AIRBUSA330

ID: 17-153
Issue date: 2017-10-24
Source: EASA
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Flight Controls – Flight Control Primary Computer – Modification / Replacement send comment

EASA PAD No.: 17-153


Notification of a Proposal to issue
an Airworthiness Directive
PAD No.: 17-153
Issued: 24 October 2017
Note: This Proposed Airworthiness Directive (PAD) is issued by EASA, acting in accordance with
Regulation (EC) 216/2008 on behalf of the European Union, its Member States and of the
European third countries that participate in the activities of EASA under Article 66 of that
Regulation.
In accordance with the EASA Continuing Airworthiness Procedures, the Executive Director is proposing the issuance of an EASA Airworthiness Directive
(AD), applicable to the aeronautical product(s) identified below.
All interested persons may send their comments, referencing the PAD Number above, to the e-mail address specified in the ‘Remarks’ section, prior to
the consultation date indicated.


Design Approval Holder’s Name: Type/Model designation(s):
AIRBUS A330 aeroplanes

Effective Date:
[TBD - standard: 14 days after AD issue date]
TCDS Numbers: EASA.A.004
Foreign AD: Not applicable
Supersedure: None


ATA 27 – Flight Controls – Flight Control Primary Computer – Modification /
Replacement


Manufacturer(s):

Airbus (formerly Airbus Industrie)

Applicability:

Airbus A330-201, A330-202, A330-203, A330-223, A330-223F, A330-243, A330-243F, A330-301,
A330-302, A330-303, A330-321, A330-322, A330-323, A330-341, A330-342 and A330-343
aeroplanes, all manufacturer serial numbers (MSN), if equipped with Flight Control Primary
Computer (FCPC) having software standard P13/M22 (hardware 2K2), P14/M23 (hardware 2K1) or
M23 (hardware 2K0), or earlier standard.

Note 1: These software standards correspond, respectively, to Part Number (P/N)
LA2K2B100DG0000, P/N LA2K1A100DF0000 and P/N LA2K01500AF0000. All affected aeroplanes
should be equipped with this software, as required by EASA AD 2015-0124R3.

Reason:

In 2015, occurrences were reported of multiple Angle of Attack (AOA) blockages. Investigation
results indicated the need for AOA monitoring in order to better detect cases of AOA blockage.



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EASA PAD No.: 17-153

This condition, if not corrected, could, under specific circumstances, lead to undue activation of the
Alpha protection, possibly resulting in reduced control of the aeroplane.

To address this potential unsafe condition, Airbus developed new FCPC software standards for
enhanced AOA monitoring and, consequently, EASA issued
AD 2015-0124 (later revised) to require these software standard upgrades.

Since EASA AD 2015-0124R3 was issued, it was identified that, for some cases, AOA blockages were
not detected by those FCPC software standards. Consequently, new FCPC software standards, as
specified in Table 1 of this AD, have been developed (Airbus modification (mod) 206412, mod
206413 and mod 206414) to further improve the detection of AOA blockage. Airbus issued Service
Bulletin (SB) A330-27-3222 and SB A330-27-3223 to implement these mods on in-service
aeroplanes.

For the reasons described above, this AD requires a software standard upgrade of the three FCPCs,
either by modification or replacement.

Required Action(s) and Compliance Time(s):

Required as indicated, unless accomplished previously:

Note 2: Airbus SB A330-27-3222 and SB A330-27-3223 are collectively referred to as ‘the applicable
SB’ in this AD.

Note 3: For the purpose of this AD, Group 1 aeroplanes are those in pre-mod 206412, pre-mod
206413 or pre-mod 206414 configuration, as applicable. Group 2 aeroplanes are those in post-mod
(206412, 206413 or 206414) configuration.

Modification / Replacement:
(1) For Group 1 aeroplanes: Within 12 months after the effective date of this AD, modify or replace
the three FCPCs, by installing software standards as specified in Table 1 of this AD, in
accordance with the instructions of the applicable Airbus SB.

Table 1 – Software Standard Updates

Software Standard to FCPC Hardware
Applicable SB
be installed Standard(s)
P15/M24 2K2 SB A330-27-3222
P16/M25 2K1
SB A330-27-3223
M25 2K0

Aircraft Flight Manual (AFM) Change:
(2) After modification of an aeroplane as required by paragraph (1) of this AD and after
modification of an aeroplane as required by paragraph (1) or (2), as applicable, of EASA AD
2015-0134, the operational procedure ‘AFM Temporary Revision 528 Issue 1.0’, as required by
EASA AD 2014-0267-E, is no longer required and can be removed from the AFM of that
aeroplane.


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EASA PAD No.: 17-153


Credit:
(3) An aeroplane modified as required by paragraph (1) of this AD remains compliant with the
modification requirements of paragraph (1) of EASA AD 2015-0124 (any revision) for that
aeroplane.

Part Installation Prohibition:
(4) Do not install on an aeroplane any software or hardware of a version earlier than the one listed
in Table 1 of this AD, as required by paragraph (4.1) or (4.2) of this AD, as applicable.

(4.1) For Group 1 aeroplanes: After modification of the aeroplane as required by paragraph
(1) of this AD.

(4.2) For Group 2 aeroplanes: From the effective date of this AD.

Ref. Publications:

Airbus SB A330-27-3222 original issue dated 16 February 2017.

Airbus SB A330-27-3223 original issue dated 06 June 2017.

The use of later approved revisions of these documents is acceptable for compliance with the
requirements of this AD.

Remarks:
1. This Proposed AD will be closed for consultation on 21 November 2017.

2. Enquiries regarding this PAD should be referred to the EASA Safety Information Section,
Certification Directorate. E-mail: ADs@easa.europa.eu.

3. For any question concerning the technical content of the requirements in this PAD, please
contact: AIRBUS – EIAL (Airworthiness Office), E-mail: airworthiness.A330-A340@airbus.com.




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This is a partial extract of the full document - please refer to the actual report for full information.
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