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Appendix H to GM 21.A.101 Examples of documenting the proposed certification basis list

Available versions for ERULES-1963177438-4666

ED Decision 2017/024/R found in: Initial Airworthiness and Environmental Protection (748/2012) Part-21 Part-21L (Jul 2024)

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Appendix H to GM 21.A.101 Examples of documenting the proposed
certification basis list

ED Decision 2017/024/R

H.1    Example
1.

H.1.1 This optional tool may be used to establish
the applicable airworthiness and OSD certification specifications that will
become part of the type-certification basis for airworthiness or OSD certification
basis. For a significant change, the applicant must demonstrate compliance for
the change and the area affected by the change with the certification
specifications that were in effect at the date of application. However, in
some cases earlier or later certification specifications can be used, as
allowed in point [21.A.101](#_DxCrossRefBm1649096998).

H.1.2 In order to efficiently determine and agree
upon a certification basis with EASA, the following information is useful to
understand the applicant’s position:

H.1.2.1 The
scope of the change. This includes a high-level description of the physical
and functional changes and performance/functional characteristics, which are
changed as a result of the physical or functional change, and the
certification specifications for which compliance demonstration is required as
a result of the change.

H.1.2.2
The amendment level of all the applicable certification specifications at the
date of application.

H.1.2.3
The proposed certification basis, including amendment levels.

H.1.2.4
Applicants who propose a certification basis that includes amendment levels
earlier than what was in effect at the date of application should include the
exception as outlined in point [21.A.101](#_DxCrossRefBm1649096998) and their justification if needed.

H.1.3 Exceptions.

H.1.3.1 Unrelated
changes that are not significant (point [21.A.101](#_DxCrossRefBm1649096998)(b)(1)).

H.1.3.2
Not affected by the change (point [21.A.101](#_DxCrossRefBm1649096998)(b)(2)).

H.1.3.3
Compliance with the certification specification would not contribute
materially to the level of safety (point [21.A.101](#_DxCrossRefBm1649096998)(b)(3)).

H.1.3.4
Compliance with the certification specification would be impractical (point [21.A.101](#_DxCrossRefBm1649096998)(b)(3)).

H.1.4 One easy way to document the proposed
certification basis is using a tabular form as shown in Table below.

Table
H-1. Tabular Form for Documenting a Proposed Certification Basis

<table border="1" cellpadding="0" cellspacing="0">
<thead>
<tr>
<td rowspan="2" width="50">
CS
</td>
<td colspan="3" width="293">
Amendment Levels
</td>
<td rowspan="2" width="135">
Applicant Justification for
 Lower Amendment Level and Comments
</td>
<td rowspan="2" width="125">
Affected Area
</td>
</tr>
<tr>
<td width="98">
Existing TCDS Amendment
</td>
<td width="98">
Amendment at Date of Application
</td>
<td width="98">
Proposed Amendment Level
</td>
</tr>
</thead>
<tr>
<td colspan="6" width="603">
Subpart
 A — General
</td>
</tr>
<tr>
<td width="50">
</td>
<td width="98">
</td>
<td width="98">
</td>
<td width="98">
</td>
<td width="135">
</td>
<td width="125">
</td>
</tr>
<tr>
<td colspan="6" width="603">
Subpart B — Flight
</td>
</tr>
<tr>
<td width="50">
</td>
<td width="98">
</td>
<td width="98">
</td>
<td width="98">
</td>
<td width="135">
</td>
<td width="125">
</td>
</tr>
</table>

H.1.5 Best Practices.

H.1.5.1
Account for all certification specifications, even if they are not applicable.

H.1.5.2
Mark certification specifications that are not applicable as ‘N/A’.

H.1.5.3
If more than one amendment level is used depending on the area of the product,
list all areas and amendment levels at each area with proper justification.

H.1.5.4
If the justification is long, provide the justification below the table and
only place the certification specification reference and note in the comment
field.

H.1.5.5
Include airworthiness and OSD standards required by other EU regulations (e.g.
Part‑26) of affected areas.

H.2    Example
2.

Pages 129
through 135 of this Appendix contain another example for documenting a proposed
certification basis.

Title
of Design Change

Product
Name or Change to Type Certificate [XXXX]

Proposed
Certification Basis Pursuant to point 21.A.101

1.      INTRODUCTION.

1.1     REFERENCE DOCUMENTS.

<table border="1" cellpadding="0" cellspacing="0">
<tr>
<td valign="top" width="161">
Reference
</td>
<td valign="top" width="402">
Title
</td>
</tr>
<tr>
<td valign="top" width="161">
[1]
 Point 21.A.101
</td>
<td valign="top" width="402">
Designation
 of applicable certification specifications and environmental protection
 requirements
</td>
</tr>
<tr>
<td valign="top" width="161">
[2]
 GM 21.A.101-1B
</td>
<td valign="top" width="402">
Establishing
 the Certification Basis of Changed Aeronautical Products
</td>
</tr>
<tr>
<td valign="top" width="161">
[3]
 XXXX
</td>
<td valign="top" width="402">
Application
 letter
</td>
</tr>
<tr>
<td valign="top" width="161">
[4]
 Type Certificate YYYY
</td>
<td valign="top" width="402">
Product
 type-certification basis
</td>
</tr>
<tr>
<td valign="top" width="161">
[5]
 Document ZZZZ
</td>
<td valign="top" width="402">
Certification
 plan
</td>
</tr>
<tr>
<td valign="top" width="161">
[6]
</td>
<td valign="top" width="402">
</td>
</tr>
</table>

1.2     ACRONYMS.

<table border="1" cellpadding="0" cellspacing="0">
<tr>
<td valign="top" width="160">
Acronym
</td>
<td valign="top" width="402">
Meaning
</td>
</tr>
<tr>
<td valign="top" width="160">
AFM
</td>
<td valign="top" width="402">
Aircraft
 Flight Manual
</td>
</tr>
<tr>
<td valign="top" width="160">
AMC
</td>
<td valign="top" width="402">
Acceptable
 Means of Compliance
</td>
</tr>
<tr>
<td valign="top" width="160">
CRI
</td>
<td valign="top" width="402">
Certification
 Review Item
</td>
</tr>
<tr>
<td valign="top" width="160">
ELOS
</td>
<td valign="top" width="402">
Equivalent
 Level of Safety
</td>
</tr>
<tr>
<td valign="top" width="160">
ESF
</td>
<td valign="top" width="402">
Equivalent
 Safety Finding
</td>
</tr>
<tr>
<td valign="top" width="160">
GM
</td>
<td valign="top" width="402">
Guidance
 Material
</td>
</tr>
<tr>
<td valign="top" width="160">
MOC
</td>
<td valign="top" width="402">
Means
 of Compliance
</td>
</tr>
<tr>
<td valign="top" width="160">
SC
</td>
<td valign="top" width="402">
Special
 Condition
</td>
</tr>
<tr>
<td valign="top" width="160">
TC
</td>
<td valign="top" width="402">
Type
 Certificate
</td>
</tr>
</table>

1.3     PURPOSE OF THE DOCUMENT.

The purpose of this document is to propose
the certification basis applicable to [Product Design Change] in accordance
with point [21.A.101](#_DxCrossRefBm1649096998).

2.      DESIGN DEFINITION.

2.1     BASELINE PRODUCT.

The
type design to be changed, which is also known as the ‘baseline product,’ is
the Model Series\_\_\_ (this should be a specific product configuration, such as
a specific serial number or line number).

The
reference product certification basis is TCDS No. [XXXX], issued on [DATE].

2.2     DESIGN
CHANGE AND BASELINE PRODUCT COMPARISON SUMMARY.

<table border="1" cellpadding="0" cellspacing="0">
<tr>
<td valign="top" width="303">
Specification
</td>
<td valign="top" width="129">
Model
 Series X
</td>
<td valign="top" width="129">
Model
 Series Y
</td>
</tr>
<tr>
<td valign="top" width="303">
Max
 Taxi Weight — MTW (lb)
</td>
<td valign="top" width="129">
A1
</td>
<td valign="top" width="129">
A2
</td>
</tr>
<tr>
<td valign="top" width="303">
Max
 Take-off Weight — MTOW (lb)
</td>
<td valign="top" width="129">
B1
</td>
<td valign="top" width="129">
B2
</td>
</tr>
<tr>
<td valign="top" width="303">
Max
 Landing Weight — MLW (lb)
</td>
<td valign="top" width="129">
C1
</td>
<td valign="top" width="129">
C2
</td>
</tr>
<tr>
<td valign="top" width="303">
Max Zero Fuel Weight — MZFW
 (lb)
</td>
<td valign="top" width="129">
D1
</td>
<td valign="top" width="129">
D2
</td>
</tr>
<tr>
<td valign="top" width="303">
Max
 Length (ft, in)
</td>
<td valign="top" width="129">
E1
</td>
<td valign="top" width="129">
E2
</td>
</tr>
<tr>
<td valign="top" width="303">
Max
 Height (ft, in)
</td>
<td valign="top" width="129">
F1
</td>
<td valign="top" width="129">
F2
</td>
</tr>
<tr>
<td valign="top" width="303">
Wing
 Span (ft, in)
</td>
<td valign="top" width="129">
G1
</td>
<td valign="top" width="129">
G2
</td>
</tr>
<tr>
<td valign="top" width="303">
Horizontal
 Tail Span (ft, in)
</td>
<td valign="top" width="129">
H1
</td>
<td valign="top" width="129">
H2
</td>
</tr>
<tr>
<td valign="top" width="303">
Fuel
 Capacity (gal)
</td>
<td valign="top" width="129">
I1
</td>
<td valign="top" width="129">
I2
</td>
</tr>
<tr>
<td valign="top" width="303">
Total
 Cargo Volume (ft3)
</td>
<td valign="top" width="129">
J1
</td>
<td valign="top" width="129">
J2
</td>
</tr>
<tr>
<td valign="top" width="303">
Max
 Passenger Limit — one class seating (occupants)
</td>
<td valign="top" width="129">
K1
</td>
<td valign="top" width="129">
K2
</td>
</tr>
<tr>
<td valign="top" width="303">
Engine
 Types
</td>
<td valign="top" width="129">
L1 &amp; M1
</td>
<td valign="top" width="129">
L2
</td>
</tr>
<tr>
<td valign="top" width="303">
Maximum
 Engine Thrust
</td>
<td valign="top" width="129">
T1
</td>
<td valign="top" width="129">
T2
</td>
</tr>
</table>

2.3     DESCRIPTION OF DESIGN
CHANGE, GROUPING AND CLASSIFICATION.

2.3.1  SIGNIFICANT CHANGE(S).

The following group of changes is proposed
as significant based on [GM 21.A.101‑1, Appendix A, ‘[Description of
Change in Appendix A]] or [the general configuration is not retained,
principles of construction are not retained, or assumptions for certification
of the product to be changed do not remain valid].

Changes Related to [Title
of Significant Change X]:

[Title of High-Level Change
C1]

The areas of physical change are:

—
[design change xx]

—
[design change yy]

—
[design change zz]

The areas unchanged but affected by the change
are:

—
[affected area aaa]

—
[affected area bbb]

—
[affected area ccc]

[Title of High-Level Change
C2]…

2.3.2  UNRELATED
NOT-SIGNIFICANT CHANGES.

[Title of High-Level Change
D1]. [Description].

[Title of High-Level Change
D2]. [Description]…

3.      IDENTIFICATION OF APPLICABLE CERTIFICATION STANDARDS.

3.1     PROPOSED
CERTIFICATION BASIS.

Based on the effective application date,
[date], under the provisions of [21.A.101](#_DxCrossRefBm1649096998),
the applicable certification standards for the [Title of Design Change] are
proposed as follows. The proposed certification basis includes exceptions to
earlier amendments (reversions), deviations, special conditions, and
equivalent (level of) safety findings.

3.1.1  Certification
specifications effective at the date of application.

Applicable certification specifications in
effect on the date of the application are:

Example for large aeroplanes:

A.      Airworthiness:

—
CS-25,

—
CS-AWO.

B.      Operational
Suitability Data:

—
CS-CCD,

—
CS-FCD,

—
CS-MCSD (to be published),

—
CS-MMEL,

—
CS-SIMD.

C.       Environmental
Protection:

—
CS-34,

—
CS-36.

3.1.2  Point
21.A.101 exception rationale.

The completed rationale for each does not
contribute materially to the level of safety (DCMLS) or impracticality exception
is provided in this section.

Exception 1: …

Exception 2: …

3.1.3  Optional
certification standards

Applicable certification specifications in
effect on the date of the application are:

Example for large aeroplanes:

—
CS 25.803, *Emergency
evacuation*, Amendment 12,

—
CS 25.1810, *Emergency
egress assisting means and escape routes*, Amendment 17.

3.1.4  Design-related
requirements from other aviation domains.

Applicable certification specifications in
effect on the date of the application are:

Example for large aeroplanes:

—
CS‑ACNS
Communications, Navigation and Surveillance

—
Initial Issue, dated 17 December 2013,
Subpart D Sections 2/3,

—
CS‑26.

3.1.5  Proposed
Special Conditions.

<table border="1" cellpadding="0" cellspacing="0">
<tr>
<td valign="top" width="121">
Special
 Condition 
 (or TBD)
</td>
<td width="289">
Title
</td>
<td valign="top" width="113">
Effective
 Date 
 (or TBD)
</td>
</tr>
<tr>
<td valign="top" width="121">
</td>
<td valign="top" width="289">
</td>
<td valign="top" width="113">
</td>
</tr>
</table>

3.1.6  Equivalent
Safety Findings.

<table border="1" cellpadding="0" cellspacing="0">
<tr>
<td valign="top" width="121">
ELOS
 Memo No 
 (or TBD)
</td>
<td width="218">
Title
</td>
<td width="184">
Applicable
 Standard
</td>
</tr>
<tr>
<td valign="top" width="121">
</td>
<td valign="top" width="218">
</td>
<td valign="top" width="184">
</td>
</tr>
</table>

3.1.7  Deviations.

<table border="1" cellpadding="0" cellspacing="0">
<tr>
<td valign="top" width="122">
Deviation
 No 
 (or TBD)
</td>
<td width="151">
Title
</td>
<td width="137">
Applicable
 Standard
</td>
<td valign="top" width="113">
Date
 Issued 
 (or TBD)
</td>
</tr>
<tr>
<td valign="top" width="122">
</td>
<td valign="top" width="151">
</td>
<td valign="top" width="137">
</td>
<td valign="top" width="113">
</td>
</tr>
</table>

3.1.8  Elect
to comply

<table border="1" cellpadding="0" cellspacing="0">
<tr>
<td valign="top" width="121">
Elect
 to Comply No 
 (or TBD)
</td>
<td width="152">
Title
</td>
<td width="137">
Applicable
 Standard
</td>
<td valign="top" width="113">
Date
 Issued 
 (or TBD)
</td>
</tr>
<tr>
<td valign="top" width="121">
</td>
<td valign="top" width="152">
</td>
<td valign="top" width="137">
</td>
<td valign="top" width="113">
</td>
</tr>
</table>

Proposed Certification Basis

The certification basis is a complete
extract from the applicable FAA 14 CFR part [A] and it references the certification basis [B]. Column [C] identifies the
amendment level for the specific requirement on the date of application. The
changed product’s certification basis is proposed in last column [D]. References to FAR sections and amendments are kept.

Example for a Part 25 aeroplane:

<table border="1" cellpadding="0" cellspacing="0">
<tr>
<td width="87">
[A]
Requirement
</td>
<td width="95">
Title
(or
 subparagraph)
</td>
<td width="84">
[B] 
 Existing Certification Basis Amendment Level
</td>
<td width="84">
[C]
 Amendment Level on Application Date
</td>
<td width="84">
[D]
 Proposed Amendment for Changed Product
</td>
<td width="80">
Applicable
 Area
</td>
<td width="90">
Notes
</td>
</tr>
<tr>
<td rowspan="2" width="87">
25.25
</td>
<td colspan="6" width="516">
Weight limits
</td>
</tr>
<tr>
<td width="95">
</td>
<td width="84">
25-23
</td>
<td width="84">
25-63
</td>
<td width="84">
25-63
</td>
<td width="80">
Product
</td>
<td width="90">
</td>
</tr>
<tr>
<td rowspan="2" width="87">
25.33
</td>
<td colspan="6" width="516">
Propeller speed and pitch limits
</td>
</tr>
<tr>
<td width="95">
</td>
<td width="84">
N/A
</td>
<td width="84">
25-72
</td>
<td width="84">
N/A
</td>
<td width="80">
—
</td>
<td width="90">
Not
 applicable to Changed Product 
 (Jet Aircraft)
</td>
</tr>
<tr>
<td rowspan="3" width="87">
25.1309(a)
</td>
<td colspan="6" width="516">
Equipment, systems, and installations
</td>
</tr>
<tr>
<td width="95">
</td>
<td width="84">
25-41
</td>
<td width="84">
15-123
</td>
<td width="84">
25-123
</td>
<td width="80">
Changed
 and Affected Areas
</td>
<td width="90">
</td>
</tr>
<tr>
<td width="95">
</td>
<td width="84">
25-41
</td>
<td width="84">
25-123
</td>
<td width="84">
25-41
</td>
<td width="80">
Exception
 — Not Affected
</td>
<td width="90">
See
 example 1 in section 3.1.2
</td>
</tr>
<tr>
<td rowspan="2" width="87">
25.1703
</td>
<td colspan="6" width="516">
Function and installation: EWIS
</td>
</tr>
<tr>
<td width="95">
</td>
<td width="84">
N/A
</td>
<td width="84">
25-124
</td>
<td width="84">
N/A
</td>
<td width="80">
Exception
 — Product
</td>
<td width="90">
See
 example 2 in section 3.2.1
</td>
</tr>
</table>

##### Appendix H to GM 21.A.101 Examples of documenting the proposed certification basis list

*ED Decision 2017/024/R*

H.1 **Example
1.**

H.1.1 This optional tool
may be used to establish the applicable airworthiness and OSD
certification specifications that will become part of the
type-certification basis for airworthiness or OSD certification
basis. For a significant change, the applicant must demonstrate
compliance for the change and the area affected by the change with
the certification specifications that were in effect at the date of
application. However, in some cases earlier or later certification
specifications can be used, as allowed in point [21.A.101](#_DxCrossRefBm485230489).

H.1.2 In order to
efficiently determine and agree upon a certification basis with EASA,
the following information is useful to understand the applicant’s
position:

H.1.2.1 The scope of the
change. This includes a high-level description of the physical and
functional changes and performance/functional characteristics, which
are changed as a result of the physical or functional change, and the
certification specifications for which compliance demonstration is
required as a result of the change.

H.1.2.2 The amendment level of all the applicable
certification specifications at the date of application.

H.1.2.3 The proposed certification basis,
including amendment levels.

H.1.2.4 Applicants who propose a certification
basis that includes amendment levels earlier than what was in effect
at the date of application should include the exception as outlined
in point [21.A.101](#_DxCrossRefBm485230489)
and their justification if needed.

H.1.3 Exceptions.

H.1.3.1 Unrelated
changes that are not significant (point [21.A.101](#_DxCrossRefBm485230489)(b)(1)).

H.1.3.2 Not affected by the change
(point [21.A.101](#_DxCrossRefBm485230489)(b)(2)).

H.1.3.3 Compliance with the certification
specification would not contribute materially to the level of safety
(point [21.A.101](#_DxCrossRefBm485230489)(b)(3)).

H.1.3.4 Compliance with the certification
specification would be impractical (point [21.A.101](#_DxCrossRefBm485230489)(b)(3)).

H.1.4 One easy way to
document the proposed certification basis is using a tabular form as
shown in Table below.

***Table
H-1. Tabular Form for Documenting a Proposed Certification Basis***

<table bgcolor="#d9d9d9" cellpadding="7" cellspacing="0">
<col/>
<col/>
<col/>
<col/>
<col/>
<col/>
<thead>
<tr>
<td bgcolor="#808080" rowspan="2">
CS
</td>
<td bgcolor="#808080" colspan="3">
Amendment
				Levels
</td>
<td bgcolor="#808080" rowspan="2">
Applicant
				Justification for Lower Amendment Level and Comments
</td>
<td bgcolor="#808080" rowspan="2">
Affected
				Area
</td>
</tr>
<tr>
<td bgcolor="#808080">
Existing
				TCDS Amendment
</td>
<td bgcolor="#808080">
Amendment
				at Date of Application
</td>
<td bgcolor="#808080">
Proposed
				Amendment Level
</td>
</tr>
</thead>
<tbody>
<tr>
<td bgcolor="#d9d9d9" colspan="6">
Subpart
				A — General
</td>
</tr>
<tr>
<td bgcolor="#d9d9d9">
 

</td>
<td bgcolor="#d9d9d9">
 

</td>
<td bgcolor="#d9d9d9">
 

</td>
<td bgcolor="#d9d9d9">
 

</td>
<td bgcolor="#d9d9d9">
 

</td>
<td bgcolor="#d9d9d9">
 

</td>
</tr>
<tr>
<td bgcolor="#d9d9d9" colspan="6">
Subpart
				B — Flight
</td>
</tr>
<tr>
<td bgcolor="#d9d9d9">
 

</td>
<td bgcolor="#d9d9d9">
 

</td>
<td bgcolor="#d9d9d9">
 

</td>
<td bgcolor="#d9d9d9">
 

</td>
<td bgcolor="#d9d9d9">
 

</td>
<td bgcolor="#d9d9d9">
 

</td>
</tr>
</tbody>
</table>

H.1.5 Best
Practices.

H.1.5.1 Account for all certification
specifications, even if they are not applicable.

H.1.5.2 Mark certification specifications that are
not applicable as ‘N/A’.

H.1.5.3 If more than one amendment level is used
depending on the area of the product, list all areas and amendment
levels at each area with proper justification.

H.1.5.4 If the justification is long, provide the
justification below the table and only place the certification
specification reference and note in the comment field.

H.1.5.5 Include airworthiness and OSD standards
required by other EU regulations (e.g. Part‑26)
of affected areas.

H.2 **Example
2.**

Pages 129
through 135 of this Appendix contain
another example for documenting a proposed certification basis.

## Title of Design Change

**Product
Name or Change to Type Certificate [XXXX]**

**Proposed
Certification Basis Pursuant to point 21.A.101**

**1. INTRODUCTION.**

1.1 REFERENCE
DOCUMENTS.

<table bgcolor="#d9d9d9" cellpadding="7" cellspacing="0">
<col/>
<col/>
<tr valign="top">
<td bgcolor="#808080">
Reference
</td>
<td bgcolor="#808080">
Title
</td>
</tr>
<tr valign="top">
<td bgcolor="#d9d9d9">
[1]
				Point 21.A.101
</td>
<td bgcolor="#d9d9d9">
Designation
				of applicable certification specifications and environmental
				protection requirements
</td>
</tr>
<tr valign="top">
<td bgcolor="#d9d9d9">
[2]
				GM 21.A.101-1B
</td>
<td bgcolor="#d9d9d9">
Establishing
				the Certification Basis of Changed Aeronautical Products
</td>
</tr>
<tr valign="top">
<td bgcolor="#d9d9d9">
[3]
				XXXX
</td>
<td bgcolor="#d9d9d9">
Application
				letter
</td>
</tr>
<tr valign="top">
<td bgcolor="#d9d9d9">
[4]
				Type Certificate YYYY
</td>
<td bgcolor="#d9d9d9">
Product
				type-certification basis
</td>
</tr>
<tr valign="top">
<td bgcolor="#d9d9d9">
[5]
				Document ZZZZ
</td>
<td bgcolor="#d9d9d9">
Certification
				plan
</td>
</tr>
<tr valign="top">
<td bgcolor="#d9d9d9">
[6]
</td>
<td bgcolor="#d9d9d9">
 

</td>
</tr>
</table>

*<The above-referenced documents are examples. Each applicant
should reference documents appropriate to their products and
procedures.>*

1.2 ACRONYMS.

<table bgcolor="#d9d9d9" cellpadding="7" cellspacing="0">
<col/>
<col/>
<tr valign="top">
<td bgcolor="#808080">
Acronym
</td>
<td bgcolor="#808080">
Meaning
</td>
</tr>
<tr valign="top">
<td bgcolor="#d9d9d9">
AFM
</td>
<td bgcolor="#d9d9d9">
Aircraft
				Flight Manual
</td>
</tr>
<tr valign="top">
<td bgcolor="#d9d9d9">
AMC
</td>
<td bgcolor="#d9d9d9">
Acceptable
				Means of Compliance
</td>
</tr>
<tr valign="top">
<td bgcolor="#d9d9d9">
CRI
</td>
<td bgcolor="#d9d9d9">
Certification
				Review Item
</td>
</tr>
<tr valign="top">
<td bgcolor="#d9d9d9">
ELOS
</td>
<td bgcolor="#d9d9d9">
Equivalent
				Level of Safety
</td>
</tr>
<tr valign="top">
<td bgcolor="#d9d9d9">
ESF
</td>
<td bgcolor="#d9d9d9">
Equivalent
				Safety Finding
</td>
</tr>
<tr valign="top">
<td bgcolor="#d9d9d9">
GM
</td>
<td bgcolor="#d9d9d9">
Guidance
				Material
</td>
</tr>
<tr valign="top">
<td bgcolor="#d9d9d9">
MOC
</td>
<td bgcolor="#d9d9d9">
Means
				of Compliance
</td>
</tr>
<tr valign="top">
<td bgcolor="#d9d9d9">
SC
</td>
<td bgcolor="#d9d9d9">
Special
				Condition
</td>
</tr>
<tr valign="top">
<td bgcolor="#d9d9d9">
TC
</td>
<td bgcolor="#d9d9d9">
Type
				Certificate
</td>
</tr>
</table>

*<This section constitutes a representative list of acronyms.
Each applicant should provide an acronym list appropriate for their
product and document.>*

1.3 PURPOSE
OF THE DOCUMENT.

The purpose of this document is to propose the certification basis
applicable to [Product Design Change] in accordance with
point [21.A.101](#_DxCrossRefBm485230489).

*<Note that this optional document is intended to be used for
changes to type-certified products for which the change or a portion
of the change is significant at the product level pursuant
to*[*21.A.101*](#_DxCrossRefBm485230489)*.
Not significant changes being accomplished concurrently with
significant changes(s) would also be identified in this document.>*

**2. DESIGN
DEFINITION.**

2.1 BASELINE PRODUCT.

The type design to be changed, which
is also known as the ‘baseline product,’ is the Model Series\_\_\_
(this should be a specific product configuration, such as a specific
serial number or line number).

The reference product certification
basis is TCDS No. [XXXX], issued on [DATE].

2.2 DESIGN
CHANGE AND BASELINE PRODUCT COMPARISON SUMMARY.

*<Example table where the product is an aeroplane. This is a
representative set of data that may be provided by the applicant.>*

<table bgcolor="#d9d9d9" cellpadding="7" cellspacing="0">
<col/>
<col/>
<col/>
<tr valign="top">
<td bgcolor="#808080">
Specification
</td>
<td bgcolor="#808080">
Model
				Series X
</td>
<td bgcolor="#808080">
Model
				Series Y
</td>
</tr>
<tr valign="top">
<td bgcolor="#d9d9d9">
Max
				Taxi Weight — MTW (lb)
</td>
<td bgcolor="#d9d9d9">
A1
</td>
<td bgcolor="#d9d9d9">
A2
</td>
</tr>
<tr valign="top">
<td bgcolor="#d9d9d9">
Max
				Take-off Weight — MTOW (lb)
</td>
<td bgcolor="#d9d9d9">
B1
</td>
<td bgcolor="#d9d9d9">
B2
</td>
</tr>
<tr valign="top">
<td bgcolor="#d9d9d9">
Max
				Landing Weight — MLW (lb)
</td>
<td bgcolor="#d9d9d9">
C1
</td>
<td bgcolor="#d9d9d9">
C2
</td>
</tr>
<tr valign="top">
<td bgcolor="#d9d9d9">
Max
				Zero Fuel Weight — MZFW (lb)
</td>
<td bgcolor="#d9d9d9">
D1
</td>
<td bgcolor="#d9d9d9">
D2
</td>
</tr>
<tr valign="top">
<td bgcolor="#d9d9d9">
Max
				Length (ft, in)
</td>
<td bgcolor="#d9d9d9">
E1
</td>
<td bgcolor="#d9d9d9">
E2
</td>
</tr>
<tr valign="top">
<td bgcolor="#d9d9d9">
Max
				Height (ft, in)
</td>
<td bgcolor="#d9d9d9">
F1
</td>
<td bgcolor="#d9d9d9">
F2
</td>
</tr>
<tr valign="top">
<td bgcolor="#d9d9d9">
Wing
				Span (ft, in)
</td>
<td bgcolor="#d9d9d9">
G1
</td>
<td bgcolor="#d9d9d9">
G2
</td>
</tr>
<tr valign="top">
<td bgcolor="#d9d9d9">
Horizontal
				Tail Span (ft, in)
</td>
<td bgcolor="#d9d9d9">
H1
</td>
<td bgcolor="#d9d9d9">
H2
</td>
</tr>
<tr valign="top">
<td bgcolor="#d9d9d9">
Fuel
				Capacity (gal)
</td>
<td bgcolor="#d9d9d9">
I1
</td>
<td bgcolor="#d9d9d9">
I2
</td>
</tr>
<tr valign="top">
<td bgcolor="#d9d9d9">
Total
				Cargo Volume (ft3)
</td>
<td bgcolor="#d9d9d9">
J1
</td>
<td bgcolor="#d9d9d9">
J2
</td>
</tr>
<tr valign="top">
<td bgcolor="#d9d9d9">
Max
				Passenger Limit — one class seating (occupants)
</td>
<td bgcolor="#d9d9d9">
K1
</td>
<td bgcolor="#d9d9d9">
K2
</td>
</tr>
<tr valign="top">
<td bgcolor="#d9d9d9">
Engine
				Types
</td>
<td bgcolor="#d9d9d9">
L1
				&amp; M1
</td>
<td bgcolor="#d9d9d9">
L2
</td>
</tr>
<tr valign="top">
<td bgcolor="#d9d9d9">
Maximum
				Engine Thrust
</td>
<td bgcolor="#d9d9d9">
T1
</td>
<td bgcolor="#d9d9d9">
T2
</td>
</tr>
</table>

2.3 DESCRIPTION OF DESIGN CHANGE,
GROUPING AND CLASSIFICATION.

2.3.1 SIGNIFICANT CHANGE(S).

*<Describe here the stand-alone change(s) and/or change
grouping(s) that are part of the proposed changed product and are
proposed as significant. Include with each stand-alone change or
change grouping the relevant accumulated change(s) and the applicable
physical and/or functional effects. Note, the description should be
detailed enough to identify why the change or change grouping is
proposed as significant.>*

The following group of changes is proposed as significant based on
[GM 21.A.101‑1, Appendix A, ‘[Description of Change
in Appendix A]] or [the general configuration is not retained,
principles of construction are not retained, or assumptions for
certification of the product to be changed do not remain valid].

**Changes
Related to [Title of Significant Change X]:**

**[Title
of High-Level Change C1]**

The areas of physical change are:

—
[design change xx]

—
[design change yy]

—
[design change zz]

The areas unchanged but affected by the change are:

—
[affected area aaa]

—
[affected area bbb]

—
[affected area ccc]

**[Title
of High-Level Change C2]…**

2.3.2 UNRELATED NOT-SIGNIFICANT CHANGES.

*<Describe here the not significant stand-alone changes or
change groupings that are part of the modification but are unrelated
to any of the significant changes described in paragraph 2.3.1.>*

**[Title
of High-Level Change D1]**. [Description].

*<The description must be just detailed enough to serve its
purpose, which is to identify why each of those changes is not
significant and unrelated.>*

**[Title
of High-Level Change D2]**. [Description]…

**3. IDENTIFICATION
OF APPLICABLE CERTIFICATION STANDARDS.**

3.1 PROPOSED
CERTIFICATION BASIS.

Based on the effective application date, [date], under the provisions
of [21.A.101](#_DxCrossRefBm485230489),
the applicable certification standards for the [Title of Design
Change] are proposed as follows. The proposed certification basis
includes exceptions to earlier amendments (reversions), deviations,
special conditions, and equivalent (level of) safety findings.

3.1.1 Certification specifications effective at the date of
application.

Applicable certification specifications in effect on the date of the
application are:

*<List the applicable parts and amendment levels here.>*

Example for large aeroplanes:

A. Airworthiness:

—
CS-25,

—
CS-AWO.

B. Operational Suitability Data:

—
CS-CCD,

—
CS-FCD,

—
CS-MCSD (to be published),

—
CS-MMEL,

—
CS-SIMD.

C. Environmental Protection:

—
CS-34,

—
CS-36.

3.1.2 Point 21.A.101 exception rationale.

The completed rationale for each does not contribute materially to
the level of safety (DCMLS) or impracticality exception is provided
in this section.

Exception 1: …

Exception 2: …

3.1.3 Optional certification standards

Applicable certification specifications in effect on the date of the
application are:

*<List the applicable parts and amendment levels here.>*

Example for large aeroplanes:

—
CS 25.803, *Emergency evacuation*, Amendment 12,

—
CS 25.1810, *Emergency egress assisting means and escape
routes*, Amendment 17.

3.1.4 Design-related requirements from other aviation domains.

Applicable certification specifications in effect on the date of the
application are:

*<List the applicable parts and amendment levels here.>*

Example for large aeroplanes:

—
CS‑ACNS Communications, Navigation and
Surveillance

—
Initial Issue, dated 17 December 2013, Subpart D
Sections 2/3,

—
CS‑26.

3.1.5 Proposed Special Conditions.

<table bgcolor="#d9d9d9" cellpadding="7" cellspacing="0">
<col/>
<col/>
<col/>
<tr>
<td bgcolor="#808080" valign="top">
Special
					Condition 
(or TBD)
</td>
<td bgcolor="#808080">
Title
</td>
<td bgcolor="#808080" valign="top">
Effective
					Date 
(or TBD)
</td>
</tr>
<tr valign="top">
<td bgcolor="#d9d9d9">
 

</td>
<td bgcolor="#d9d9d9">
 

</td>
<td bgcolor="#d9d9d9">
 

</td>
</tr>
</table>

3.1.6 Equivalent Safety Findings.

<table bgcolor="#d9d9d9" cellpadding="7" cellspacing="0">
<col/>
<col/>
<col/>
<tr>
<td bgcolor="#808080" valign="top">
ELOS
					Memo No 
(or TBD)
</td>
<td bgcolor="#808080">
Title
</td>
<td bgcolor="#808080">
Applicable
					Standard
</td>
</tr>
<tr valign="top">
<td bgcolor="#d9d9d9">
 

</td>
<td bgcolor="#d9d9d9">
 

</td>
<td bgcolor="#d9d9d9">
 

</td>
</tr>
</table>

3.1.7 Deviations.

<table bgcolor="#d9d9d9" cellpadding="7" cellspacing="0">
<col/>
<col/>
<col/>
<col/>
<tr>
<td bgcolor="#808080" valign="top">
Deviation
					No 
(or TBD)
</td>
<td bgcolor="#808080">
Title
</td>
<td bgcolor="#808080">
Applicable
					Standard
</td>
<td bgcolor="#808080" valign="top">
Date
					Issued 
(or TBD)
</td>
</tr>
<tr valign="top">
<td bgcolor="#d9d9d9">
 

</td>
<td bgcolor="#d9d9d9">
 

</td>
<td bgcolor="#d9d9d9">
 

</td>
<td bgcolor="#d9d9d9">
 

</td>
</tr>
</table>

3.1.8 Elect to comply

<table bgcolor="#d9d9d9" cellpadding="7" cellspacing="0">
<col/>
<col/>
<col/>
<col/>
<tr>
<td bgcolor="#808080" valign="top">
Elect
					to Comply No 
(or TBD)
</td>
<td bgcolor="#808080">
Title
</td>
<td bgcolor="#808080">
Applicable
					Standard
</td>
<td bgcolor="#808080" valign="top">
Date
					Issued 
(or TBD)
</td>
</tr>
<tr valign="top">
<td bgcolor="#d9d9d9">
 

</td>
<td bgcolor="#d9d9d9">
 

</td>
<td bgcolor="#d9d9d9">
 

</td>
<td bgcolor="#d9d9d9">
 

</td>
</tr>
</table>

**Proposed Certification
Basis**

The
certification basis is a complete extract from the applicable
FAA 14 CFR part **[A]**
and it references the certification basis **[B]**.
Column **[C]**
identifies the amendment level for the specific requirement on the
date of application. The changed product’s certification basis is
proposed in last column **[D]**.
References to FAR sections and amendments are kept.

Example
for a Part 25 aeroplane:

<table bgcolor="#d9d9d9" cellpadding="7" cellspacing="0">
<col/>
<col/>
<col/>
<col/>
<col/>
<col/>
<col/>
<tr>
<td bgcolor="#808080">
[A]
Requirement
</td>
<td bgcolor="#808080">
Title
(or
			subparagraph)
</td>
<td bgcolor="#808080">
[B] 
Existing
			Certification Basis Amendment Level
</td>
<td bgcolor="#808080">
[C]
			Amendment Level on Application Date
</td>
<td bgcolor="#808080">
[D]
			Proposed Amendment for Changed Product
</td>
<td bgcolor="#808080">
Applicable
			Area
</td>
<td bgcolor="#808080">
Notes
</td>
</tr>
<tr>
<td bgcolor="#d9d9d9" rowspan="2">
25.25
</td>
<td bgcolor="#d9d9d9" colspan="6">
Weight
			limits
</td>
</tr>
<tr>
<td bgcolor="#d9d9d9">
 

</td>
<td bgcolor="#d9d9d9">
25-23
</td>
<td bgcolor="#d9d9d9">
25-63
</td>
<td bgcolor="#d9d9d9">
25-63
</td>
<td bgcolor="#d9d9d9">
Product
</td>
<td bgcolor="#d9d9d9">
 

</td>
</tr>
<tr>
<td bgcolor="#d9d9d9" rowspan="2">
25.33
</td>
<td bgcolor="#d9d9d9" colspan="6">
Propeller
			speed and pitch limits
</td>
</tr>
<tr>
<td bgcolor="#d9d9d9">
 

</td>
<td bgcolor="#d9d9d9">
N/A
</td>
<td bgcolor="#d9d9d9">
25-72
</td>
<td bgcolor="#d9d9d9">
N/A
</td>
<td bgcolor="#d9d9d9">
			—
</td>
<td bgcolor="#d9d9d9">
Not
			applicable to Changed Product 
(Jet Aircraft)
</td>
</tr>
<tr>
<td bgcolor="#d9d9d9" rowspan="3">
25.1309(a)
</td>
<td bgcolor="#d9d9d9" colspan="6">
Equipment,
			systems, and installations
</td>
</tr>
<tr>
<td bgcolor="#d9d9d9">
 

</td>
<td bgcolor="#d9d9d9">
25-41
</td>
<td bgcolor="#d9d9d9">
15-123
</td>
<td bgcolor="#d9d9d9">
25-123
</td>
<td bgcolor="#d9d9d9">
Changed
			and Affected Areas
</td>
<td bgcolor="#d9d9d9">
 

</td>
</tr>
<tr>
<td bgcolor="#d9d9d9">
 

</td>
<td bgcolor="#d9d9d9">
25-41
</td>
<td bgcolor="#d9d9d9">
25-123
</td>
<td bgcolor="#d9d9d9">
25-41
</td>
<td bgcolor="#d9d9d9">
Exception
			— Not Affected
</td>
<td bgcolor="#d9d9d9">
See
			example 1 in section 3.1.2
</td>
</tr>
<tr>
<td bgcolor="#d9d9d9" rowspan="2">
25.1703
</td>
<td bgcolor="#d9d9d9" colspan="6">
Function
			and installation: EWIS
</td>
</tr>
<tr>
<td bgcolor="#d9d9d9">
 

</td>
<td bgcolor="#d9d9d9">
N/A
</td>
<td bgcolor="#d9d9d9">
25-124
</td>
<td bgcolor="#d9d9d9">
N/A
</td>
<td bgcolor="#d9d9d9">
Exception
			— Product
</td>
<td bgcolor="#d9d9d9">
See
			example 2 in section 3.2.1
</td>
</tr>
</table>

Compare / EASA/ Incorporated Amendments/ Compare & Highlight Differences

Appendix H to GM 21.A.101 Examples of documenting the proposed certification basis list

View