EASA AD No.: 2012-0126R1 

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EASA AIRWORTHINESS DIRECTIVE 

AD No.: 2012-0126R1 

Date: 10 September 2012 

Note: This Airworthiness Directive (AD) is issued by EASA, acting in accordance with Regulation 

(EC) No 216/2008 on behalf of the European 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 ensured by accomplishing any applicable ADs. Consequently, no person may operate 

an aircraft to which an AD applies, except in accordance with the requirements of that AD, unless otherwise 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, Article 14(4) exemption]. 

Design 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 

Revision: This AD revises EASA AD 2012-0126 dated 10 July 2012. 

ATA 26 Fire Protection – Engine and Auxiliary Power Unit Automatic Fire 

Extinguishers – Inspection / Overhaul 

Manufacturer(s): BAE Systems (Operations) Ltd, British Aerospace plc, British Aerospace 

(Commercial Aircraft) Ltd, British Aerospace (Operations) Ltd, British 

Aerospace Regional Aircraft Ltd, British Aerospace Regional Aircraft trading as 

Avro International Aerospace. 

Applicability: BAe 146 and AVRO 146-RJ series aeroplanes, all models, all serial numbers. 

Reason: A fire handle on a BAe 146 aeroplane was operated on the ground as a 

precautionary measure after the throttle cable on the affected engine failed, 

due to corrosion. The extinguisher failed to discharge. 

Investigation results revealed that excess solder, which had been deposited 

during overhaul on the frangible plug of the extinguisher, prevented the 

release of the extinguishant. Prompted by this report, Kidde Graviner, the 

fire extinguisher manufacturer, identified four further extinguishers of similar 

design that had the same issue. 

This condition, if not detected and corrected, could result in the failure of a 

fire bottle to discharge, which reduces the ability of the fire protection system 

to extinguish fires in the engine or Auxiliary Power Unit (APU) fire zones, 

possibly resulting in damage to the aeroplane and injury to the occupants. 

For the reasons described above, EASA issued AD 2012-0126 to require a 

one-time inspection of the affected Part Number (P/N) 57333 engine and APU 

fire extinguishers. In addition, this AD prohibited installation of a fire 

extinguisher, unless it has passed the inspection as required by AD 2012-0126. 
EASA AD No.: 2012-0126R1 

CAP.00110-001 © European Aviation Safety Agency. All rights reserved. 2/2 

Proprietary document. Copies are not controlled. Confirm revision status through the EASA-Internet/Intranet.

Revision 1 of this AD is issued to clarify that new extinguishers P/N 57333 may 

be fitted with no additional inspection required by this AD. 

Effective Date: 

Revision 1: 17 September 2012 

Original issue: 24 July 2012 

Required Action(s) 

and Compliance 

Time(s): 

Required as indicated, unless accomplished previously: 

(1) For aeroplanes equipped with fire extinguishers manufactured by Kidde 

Graviner P/N 57333 (all dash numbers), within 12 months after the 

effective date of this AD, remove and inspect each affected fire 

extinguisher in accordance with the instructions of paragraph 2.C of BAE 

Systems (Operations) Ltd Inspection Service Bulletin (ISB) 26-078, which 

references Kidde Graviner Service Bulletin (SB) 26-080 Revision 1. 

(2) Aeroplanes, which are equipped with P/N 57333 (all dash numbers) fire 

extinguishers that have been overhauled by Kidde Graviner or Hugen, or 

have been overhauled in accordance with the instructions of Kidde 

Graviner Service Information Letter (SIL) 01-10, or have been overhauled 

in accordance with Kidde Graviner Component Maintenance Manual 

(CMM) 26-21-40 at Revision 14 or later revision, are compliant with 

requirements of paragraph (1) of this AD. 

(3) From the effective date of this AD, do not install a Kidde Graviner P/N 

57333 (all dash numbers) fire extinguisher on any aeroplane, unless it is 

new, or has passed the inspection in accordance with the instructions of 

Kidde Graviner SB 26-080 Revision 1, or it has been overhauled by Kidde 

Graviner or Hugen, or it has been overhauled in accordance with the 

instructions of Kidde Graviner SIL 01-10 or it has been overhauled in 

accordance with Kidde Graviner CMM 26-21-40 at Revision 14 or later 

revision. 

Note: For the purpose of this AD, an overhaul is considered to include the 

replacement of the operating head. Replacement of the pressure relief 

plug assembly only is not considered an overhaul. 

Ref. Publications: BAE Systems (Operations) Limited ISB.26-078 Initial Issue dated 21 

September 2011. 

Kidde Graviner SB 26-080 Revision 1 dated 27 July 2011. 

Kidde Graviner SIL 01-10 dated 29 July 2010. 

Kidde Graviner CMM 26-21-40 at Revision 14. 

The use of later approved revisions of these documents is acceptable for 

compliance with the requirements of this AD. 

Remarks : 1. If requested and appropriately substantiated, EASA can approve 

Alternative Methods of Compliance for this AD. 

2. The original issue of this AD was posted on 30 May 2012 as PAD 12-

048R1 for consultation until 27 June 2012. The Comment Response 

Document can be found at http://ad.easa.europa.eu. 

3. Enquiries regarding this AD should be referred to the Safety Information 

Section, Executive Directorate, EASA. E-mail ADs@easa.europa.eu. 

4. For any question concerning the technical content 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 675704; 

E-mail: RApublications@baesystems.com.