Compare and highlight differences

Compare / EASA/ Incorporated Amendments/ Compare & Highlight Differences

AMC No 1 to 21.B.100(b) Level of involvement (LoI) in projects for minor changes and minor repairs

Available versions for ERULES-1963177438-15173

ED Decision 2019/018/R found in: Initial Airworthiness and Environmental Protection (748/2012) Part-21 Part-21L (Jul 2024)

From

Show details Hide details

AMC No 1 to 21.B.100(b) Level of involvement (LoI) in projects for
minor changes and minor repairs

ED Decision 2019/018/R

In contrast to [21.B.100](#_DxCrossRefBm1649096973)(a), the assessment of the LoI for
minor repair designs and minor changes is performed by EASA at the level of
the certification project.

EASA reviews the information provided by the
applicant in accordance with point [21.A.93](#_DxCrossRefBm1649096851)(b)
for novel or unusual features, the complexity of the design and/or the
compliance demonstration, as well as the criticality of the design or
technology.

An application for EASA’s approval of a
minor change implies that the applicant either does not hold a design
organisation approval (DOA) or that the change is outside the DOA holder’s
terms of approval. However, EASA takes into account the performance and
experience of the applicant with similar design changes, for which data may be
already available at EASA. The applicant may be also requested to present its
experience with similar design changes if insufficient information is
available at EASA.

By definition (see point [21.A.91](#_DxCrossRefBm1649096897)), a minor change has no
appreciable effect on the airworthiness of the product. Therefore, the
potential impact of a non-compliance with part of the certification basis
regarding the airworthiness or environmental protection aspects of the product
should, in most cases, be non-critical.

This facilitates the assessment of the
likelihood of an unidentified non-compliance.

A process similar to the one described in [AMC 21.B.100(a) and 21.A.15(b)(6)](#_DxCrossRefBm1649096977)
should be used to justify and document EASA’s LoI.

Following a first assessment of the
criticality of the described design or technology, EASA evaluates the
existence of any novel or unusual features, as well as the complexity of the
design and/or the compliance demonstration.

Depending on the results of this evaluation,
and based on the table below, EASA determines its LoI as follows:

<table border="1" cellpadding="0" cellspacing="0" width="602">
<tr>
<td colspan="2" valign="top" width="283">
</td>
<td colspan="2" valign="top" width="319">
Risk class
</td>
</tr>
<tr>
<td rowspan="2" width="109">
Non-critical
</td>
<td width="173">
Non-novel and non-complex
</td>
<td valign="top" width="160">
Class A 
</td>
<td valign="top" width="160">
Class A 
</td>
</tr>
<tr>
<td width="173">
Novel and/or complex
</td>
<td valign="top" width="160">
Class B 
</td>
<td valign="top" width="160">
Class C 
</td>
</tr>
<tr>
<td width="109">
Critical
</td>
<td width="173">
All cases
</td>
<td valign="top" width="160">
Class C 
</td>
<td valign="top" width="160">
Class C 
</td>
</tr>
<tr>
<td colspan="2" valign="top" width="283">
</td>
<td valign="top" width="160">
Level of experience: 
 high or medium
</td>
<td valign="top" width="160">
Level of experience: 
 low or unknown 
</td>
</tr>
</table>

—
Class A: EASA’s involvement is
limited to the review of the information that summarises the main results of
the compliance demonstration, without any participation in compliance
activities (witnessing of tests, audits, etc.).

—
Class B: in addition to the
LoI defined for risk Class A, EASA’s involvement is limited to the review of
those compliance elements that are related to the identified novel or unusual
features, complexity of the design and/or compliance demonstration. EASA may
exceptionally participate in the related compliance activities (by witnessing
tests, audits, etc.).

—
Class C: EASA’s involvement is
limited to the review of all the compliance documents that are related to the
identified criticality of the design or technology, if applicable, or to the
identified novel or unusual features. EASA may participate in the related
compliance activities (by witnessing tests, audits, etc.).

##### AMC No 1 to 21.B.100(b) Level of involvement (LoI) in projects for minor changes and minor repairs

*ED
Decision 2019/018/R*

In
contrast to [21.B.100](#_DxCrossRefBm485230464)(a),
the assessment of the LoI for minor repair designs and minor changes
is performed by EASA at the level of the certification project.

EASA
reviews the information provided by the applicant in accordance with
point [21.A.93](#_DxCrossRefBm485230341)(b)
for novel or unusual features, the complexity of the design and/or
the compliance demonstration, as well as the criticality of the
design or technology.

An
application for EASA’s approval of a minor change implies that the
applicant either does not hold a design organisation approval (DOA)
or that the change is outside the DOA holder’s terms of approval.
However, EASA takes into account the performance and experience of
the applicant with similar design changes, for which data may be
already available at EASA. The applicant may be also requested to
present its experience with similar design changes if insufficient
information is available at EASA.

By
definition (see point [21.A.91](#_DxCrossRefBm485230388)),
a minor change has no appreciable effect on the airworthiness of the
product. Therefore, the potential impact of a non-compliance with
part of the certification basis regarding the airworthiness or
environmental protection aspects of the product should, in most
cases, be non-critical.

This
facilitates the assessment of the likelihood of an unidentified
non-compliance.

A
process similar to the one described in
[AMC 21.B.100(a) and 21.A.15(b)(6)](#_DxCrossRefBm485230468)
should be used to justify and document EASA’s
LoI.

Following
a first assessment of the criticality of the described design or
technology, EASA evaluates the existence of any novel or unusual
features, as well as the complexity of the design and/or the
compliance demonstration.

Depending
on the results of this evaluation, and based on the table below, EASA
determines its LoI as follows:

<table bgcolor="#d9d9d9" cellpadding="7" cellspacing="0">
<col/>
<col/>
<col/>
<col/>
<tr valign="top">
<td colspan="2">
 

</td>
<td bgcolor="#d9d9d9" colspan="2">
Risk
			class
</td>
</tr>
<tr>
<td bgcolor="#d9d9d9" rowspan="2">
Non-critical
</td>
<td bgcolor="#d9d9d9">
Non-novel
			and non-complex
</td>
<td bgcolor="#16cc7f" valign="top">
Class
			A 

</td>
<td bgcolor="#16cc7f" valign="top">
Class
			A 

</td>
</tr>
<tr>
<td bgcolor="#d9d9d9">
Novel
			and/or complex
</td>
<td bgcolor="#ffe145" valign="top">
Class
			B 

</td>
<td bgcolor="#ff6b66" valign="top">
Class
			C 

</td>
</tr>
<tr>
<td bgcolor="#d9d9d9">
Critical
</td>
<td bgcolor="#d9d9d9">
All
			cases
</td>
<td bgcolor="#ff6b66" valign="top">
Class
			C 

</td>
<td bgcolor="#ff6b66" valign="top">
Class
			C 

</td>
</tr>
<tr valign="top">
<td colspan="2">
 

</td>
<td bgcolor="#d9d9d9">
Level
			of experience: 
high or medium
</td>
<td bgcolor="#d9d9d9">
Level
			of experience: 
low or unknown 

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

—
Class A: EASA’s involvement is limited to the
review of the information that summarises the main results of the
compliance demonstration, without any participation in compliance
activities (witnessing of tests, audits, etc.).

—
Class B: in addition to the LoI defined for risk
Class A, EASA’s involvement is limited to the review of those
compliance elements that are related to the identified novel or
unusual features, complexity of the design and/or compliance
demonstration. EASA may exceptionally participate in the related
compliance activities (by witnessing tests, audits, etc.).

—
Class C: EASA’s involvement is limited to the
review of all the compliance documents that are related to the
identified criticality of the design or technology, if applicable, or
to the identified novel or unusual features. EASA may participate in
the related compliance activities (by witnessing tests, audits,
etc.).

Compare / EASA/ Incorporated Amendments/ Compare & Highlight Differences

AMC No 1 to 21.B.100(b) Level of involvement (LoI) in projects for minor changes and minor repairs

View