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GM1 21.A.7(a) Scope of ICA, their publication format and typical ICA data

Available versions for ERULES-1963177438-18957

ED Decision 2021/007/R found in: Initial Airworthiness and Environmental Protection (No 748/2012) Part-21 Part-21L (Jul 2024)

Version Text

GM1 21.A.7(a) Scope of ICA, their publication format and typical
ICA data

ED Decision 2021/007/R

(a)     ICA
can be published in documents or in a manner other than the traditional
understanding of a document — for example, as a series of web pages, or
Information Technology (IT) tools, or in a publishing format linked to tasks
or data modules rather than pages.

(b)     The
design approval holder (DAH) can decide — within the framework provided by
point [21.A.7](#_DxCrossRefBm1649096932) and its acceptable
means of compliance and guidance material — to publish the ICA in the most
suitable location as part of all the information published to support the
airworthiness of an aircraft. Publications typically produced by DAHs (e.g.
for the demonstration of compliance with a certification basis established on
the basis of CS-25), and which may therefore include ICA, consist of:

—
aircraft maintenance manuals
(AMMs);

—
scheduled maintenance
requirements (e.g. MRBRs);

—
off-wing component maintenance
or overhaul manuals;

—
parts catalogues;

—
tooling manuals;

—
wiring diagram manuals;

—
weight and balance manuals;

—
electrical loads analyses;

—
extended range operations
(ETOPS) configuration maintenance programs/plans;

—
supplemental structural
inspection documentation;

—
certification maintenance
requirements;

—
Airworthiness Limitations
items;

—
ageing aircraft maintenance
requirements;

—
fuel tank safety related
limitations (e.g. critical design configuration control limitation (CDCCL));

—
electrical wiring
interconnection system instructions;

—
corrosion prevention and
control programmes;

—
troubleshooting manuals.

*Note:* The
above is only an example of the publications that may contain ICA according to
CS‑25; the list is not exhaustive, nor does it represent a minimum list of
ICA.

(c)      The
requirement for ICA is not intended to ensure that all products or articles
may be restored to an airworthy condition. A certain level of deterioration
may require a product or an article to be permanently withdrawn from service,
and restoration may not be reasonably achievable. Notwithstanding the above,
the existence of an MRBR task other than ‘Discard (DS or DIS)’ should be a
clear indication of the necessity/obligation to produce a corresponding ICA.

Certain deteriorations or levels of
deterioration may require specific instructions (e.g. inspection or
restoration) that will only be developed and provided on a case-by-case basis,
as needed, for a given product or article, and as such, will not be included
in the ICA.

In some exceptional cases, product ICA may
ultimately instruct the user to contact the DAH in order to define the
specific instructions on a case-by-case basis. This typically happens when the
definition of generic instructions covering all possible cases is not
possible. For example, following an aircraft hard landing, a detailed analysis
may have to be carried out by the DAH to determine the specific instructions
to be followed, which depends on the touchdown loads, recalculated postflight,
based on recorded flight data.