EASA AD No : 2011-0220

EASA Form 110 Page 1/2 

## EASA AIRWORTHINESS DIRECTIVE

AD No.: 2011-0220

Date: 11 November 2011

Note: This Airworthiness Directive (AD) is issued b y EASA, acting in accordance with Regulation (EC) No 216/2008 on behalf of the European Communit y, 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 AD applies, except in accordan ce with the requirements of that AD, unless otherwi se specified by the Agency [EC 2042/2003 Annex I, Part M.A.303] or agreed with the Authority of the State of Registry [EC 216/2008, A rticle 14(4) exemption]. 

### Type Approval Holder’s Name :
BAE SYSTEMS (Operations) LTD Type/Model designation(s) : 

### BAe 146 and AVRO 146-RJ aeroplanes

TCDS Number: EASA.A.182

Foreign AD: Not applicable

Supersedure: None



### ATA 29 Hydraulics – Hydraulic Fluid Containment Sys tem – Installation

Manufacturer(s): BAE Systems (Operations) Ltd, Brit ish Aerospace plc, British Aerospace (Commercial Aircraft) Ltd, British Aerospace (Opera tions) Ltd, British Aerospace Regional Aircraft Ltd, British Aerospace Regional A ircraft trading as Avro International Aerospace.
Applicability: BAe 146 and AVRO 146-RJ series aerop lanes, all models, all serial numbers, except aeroplanes not carrying passengers.
Reason: Cases of hydraulic pipe ruptures in the cen tre of the cabin of BAe 146 aeroplanes have been reported, which have resulted in the pass engers being contaminated with hydraulic fluid. The results of the investiga tions have shown that the pipe failures were caused by a combination of seam welde d pipes, bends in the pipe runs with small bend radii and fatigue damage due t o pressure variations. This condition, if not corrected, could lead to har mful or hazardous concentrations of hydraulic fluid or hydraulic vapour entering the passenger compartment, possibly resulting in injury to the occupants. For the reasons described above, this AD requires t he installation of a flexible envelope around the hydraulic pipe group where the failures have occurred to capture and contain any fluid escaping from a burst pipe and channel it below floor level into the forward cargo bay.

Effective Date: 25 November 2011

Required action(s) and Compliance Required as indicated, unless accomplished previous ly: (1) Within 4 000 flight cycles or 2 years after the effective date of this AD,EASA AD No : 2011-0220

EASA Form 110 Page 2/2 Time(s): whichever occurs first, install the hydrau lic fluid containment system in accordance with the accomplishment instructions of BAE Systems (Operations) Ltd Service Bulletin (SB) 29-048-30676 A Revision 2.
(2) Installation of the hydraulic fluid containment system before the effective date of this AD in accordance with the accomplishment in structions of BAE Systems (Operations) Ltd SB 29-048-30676A Original issue and/or Revision 1 is acceptable to comply with the requirements of th is AD.

Ref. Publications: BAE Systems (Operations) Limited Modification Servi ce Bulletin SB 29-048- 30676A Revision 2 dated 23 December 2010. The use of later approved revisions of this documen t 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. This AD was posted on 23 September 2011 as PAD 1 1-101 for consultation until 21 October 2011. The Comment Response Documen t can be found at http://ad.easa.europa.eu/

. 3. Enquiries regarding this AD should be referred t o the Safety Information Section, Executive 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 1292 67570 4; E-mail: RApublications@baesystems.com

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