EASA AD No.: 2011-0096

EASA Form 110 Page 1/2 

## EASA AIRWORTHINESS DIRECTIVE

AD No.: 2011-0096

Date: 25 May 2011

Note: This Airworthiness Directive (AD) is issued b y EASA, acting in accordance with Regulation (EC) No 216/2008 on behalf of the Europe an Community, its Member States and of the European third countries that participate in the activities of EASA under Article 66 of that Regulation. This AD is issued in accordance with EC 1702/2003, Part 21A.3B. In accordance with EC 2042/2003 Annex I, Part M.A.301, the continuing airworthiness of an aircraft shall be en sured by accomplishing any applicable ADs. Conseque ntly, no person may operate an aircraft to which an Airworthiness Directive app lies, except in accordance with the requirements of that Airworthiness Directive unless otherwise specified by the Agency [EC 2042/2 003 Annex I, Part M.A.303] or agreed with the Autho rity of the State of Registry [EC 216/2008, Article 14(4) exemption]. 

### Type Approval Holder’s Name : 

### BAE Systems (Operations) Ltd Type/Model designation(s) :
Jetstream 4100 aeroplanes

TCDS Number: EASA.A.189

Foreign AD: Not applicable

Supersedure None



### ATA 57 Wings – Wing Rear Spar – Inspection / Repair

Manufacturer(s): Jetstream Aircraft Ltd, British Ae rospace Regional Aircraft Ltd, British Aerospace (Operations) Ltd and British Aerospace (C ommercial Aircraft) Ltd.

Applicability: Jetstream 4100 aeroplanes, all models, all serial n umbers.

Reason: Four cracks were found on a wing rear spar by an operator during a fuel leak investigation. The cracks were located between ribs 6 and 7, immediately inboard of the inboard engine rib. The cracks initiated at adjacent fastener bores in the rear spar upper boom and progressed downwards, diagonally, into the rear spar web. Such cracking in the rear spar, if not detected and corrected, could propagate to a critical length, possibly affecting the structural integrity of the area and/or resulting in a fuel tank rupture, and c onsequent damage to the aeroplane and injury to its occupants. For the reasons described above, this AD requires a one-time inspection of the rear face of the wing rear spar and the accompl ishment of the associated corrective actions, depending on finding s.

Effective Date: 08 June 2011.

Required Action(s) and Compliance Time(s): Required as indicated, unless accomplished previous ly:
(1) Within 300 flight hours after the effective dat e of this AD or before next flight, in case a fuel leak is detected in the vici nity of a wing rear spar, whichever occurs first, inspect the rear face of th e wing rear spars inEASA AD No.: 2011-0096

EASA Form 110 Page 2/2 accordance with the instructions of paragraph 2.A. of BAE Systems (Operations) Ltd Alert Service Bulletin (ASB) J41-A57-029.
(2) If, during the inspection required by paragraph (1) of this AD, any cracks, corrosion or other defects are found, befor e next flight, accomplish the associated corrective action defined in Table 1 of this AD:
Table 1 Damage found: Corrective action:
within the criteria as specified in BAE Systems (Operations) Ltd Jetstream 4100 Structural Repair Manual (SRM) 57-00-00 Repair in accordance with the repair instructions of BAE Systems (Operations) Ltd Jetstream 4100 SRM 57-00-00.

exceeds the criteria as specified in BAE Systems (Operations) Ltd Jetstream 4100 SRM 57-00-00 Repair the damage in accordance with a BAE Systems approved repair scheme or contact BAE Systems (Operations) Ltd. for approved repair instructions and accomplish those instructions accordingly.

(3) Within 10 days after the inspection required by paragraph (1) of this AD, report all findings, including no defects, to B AE Systems (Operations) Ltd in accordance with the instruction s of paragraph 2.A.(7) of ASB J41-57-029.

Ref. Publications: BAE Systems (Operations) Limited Alert Service Bull etin J41-A57-029, Original issue, dated 6 May 2011. Jetstream 4100 Structural Repair Manual Revision 30 dated 15 April 2007. The use of later approved revisions of these docume nts is acceptable for compliance with the requirements of this AD.

Remarks : 1. If requested and appropriately substantiated, EA SA can approve Alternative Methods of Compliance for this AD. 2. The required actions and the risk allowance have granted the issuance of a Final AD with Request for Comments, postponing the public consultation process after publication. 3. Enquiries regarding this AD should be referred t o the Airworthiness Directives, Safety Management & Research Section, C ertification Directorate, EASA. E-mail ADs@easa.europa.eu

. 4. For any question concerning the technical conten t of the requirements in this AD, please contact: BAE Systems (Operations) Ltd, Customer Information Department, Prestwick International Airport, Ayrshire, KA9 2RW, Scotland, United Kingdom; Telephone +44 1292 675207, Facsimile +44 1 292 675704; E-mail: RApublications@baesystems.com

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