## EASA EASA AD No.: 2012-0270 

## AIRWORTHINESS DIRECTIVE AD N o. : 20 12-0270
Date: 20 Dece mber 2012 Note: This Ai rworth i ness Di rective (AD) is i ssued by EASA, acting in accordance with Regu latio n (EC) No 216/2008 on behalf of the European Communi ty , i ts Member States and of the European t hi rd coun tries that part ici pate i n th e activiti es of EASA under Article 66 of that Regulation. This AD is issued i n accordan ce with EU 748/2012 , Part 21A.3B
. I n accordance with EC 204212003 Annex I , Part M.A.301 , th e conti nu ing ai rworth iness of an aircraft shall be ensured by accompli sh ing any appl icable ADs. Consequently, no person may operate an a i rcraft to which an AD app lies , except i n accordance with the r'equ i rements of that AD , un less ot herwi se specified by the Agency [ EC 204212003 Annex I , Part M
.A.303) or agreed wi th the A uthority of the State of Registry [EC 216/2008, Article 14(4) exempt ion)
. 

### Design Approva l Holder's Name : Type/Model designation(s) : BRI TTEN-NORMAN AIRCRAFT Ltd
. BN2A and BN2A Mark Ill aeroplanes TCDS Number: Foreign AD: Supersedure:


### ATA28 Manufacturer(s): Applicability:
Reason:

Effective Date: EASA.A.388, CAA UK BA6 Not applicable None 

### Fuel System- Tank Filler Cap and Receptacle- In spection 

### I Replacement
Britten-Norman Aircraft Limited, B-N Group Ltd , Britten-Norman Ltd, Fairey Britten-Norman Ltd, Britten - Norman (Bembridge) Ltd, Pilatus Britten-Norman Ltd and PADC. BN2A aeroplanes, all models, all serial numbers BN2A Mark Ill and Marrk 

### 111-1 (Trislander) aeroplanes, all serial numbers Pre liminary investigations into a recent engine failure on a BN2 aeroplane have attributed the event to water contaminated fuel. The contamination is suspected to have occurred due to inadequate sealing between a post-mod NB-M-477 fuel filler cap and a pre-mod NB-M-477 fuel filler receptacle. This condition, if not detected and corrected, could lead to fuel water contamination, possibly resu lting in in-flight shut down of the engine
. For the reasons described above, this AD requires a one-time inspection of the fuel fille r cap and fuel filler receptacle to determine whether they are at the same modification state and, depending on findings, accomplishment of applicable corrective action(s). To mitigate the risk of water contamination pending the installation of matching fuel filler cap and receptacle, this AD a lso requires daily pre -flight water contamination checks. 03 January 2013

TE.CAP.OOll0 - 003 © Europea n Aviat ion Safety Agency. All rights reserved. 1/2 Proprietary d ocument. Copies are not controlled
. Confi r m rev ision stat u s through the EASA · Internet/ I ntranet.EASA AD No.: 2012-0270 Required Action (s) Required as indicated , unless accomplished previously : and Compliance (1) Within 30 days after the effective date of this AD inspect the aircraft fuel Time(s): replenishment points on the top surface of the wings and depending on findings, remove and check each of the quick release fuel filler caps, ensuring that the cap and the fue l filler receptacle are at the same modification state in accordance with the instructions of the paragraph 6 of the Britten-Norman (SB) 332. Note: To aid identification of fuel filler cap modification status , post-mod NB-M477 fuel filler caps are fitted with a quick release key (see SB 332, Figure 2) whereas the pre-mod NB-M-477 are not (see SB 332 , Figure 1). (2) If, during the inspection as required by paragraph ( 1) of th is AD, a mismatch is fo u nd, before next flight after the inspection, and thereafter during each daily pre-flight check, in addition to the normal daily checks specified by the Maintenance Schedule MS/1 (Section 2: Check 'A' Inspection), accomplish water contamination checks of the gasco lators and fuel tank sump drains , including those of the wing tip tanks, if installed. (3) If, during the inspection as required by paragraph (1) of this AD, a mismatch of fuel filler cap and fuel filler receptacle is found , within 3 months after the effective date of this AD , fit the correct quick release fuel filler cap in accordance with the instructions of paragraph 6 of the BrittenNorman SB 332. (4) After modification of an aeroplane as required by paragraph (3) of this AD, the daily pre-flight water contamination checks as specified in paragraph (2) of this AD are no longer required for that aeroplane. (5) After the effective date of this AD, do not install on an aeroplane any fuel filler cap or fuel filler receptacle, unless it has been determined that both are at the same modification state. Ref. Pub lications: Britten-Norman SB 332 Issue 1 , dated 06 December 2012. The use of later approved revisions of this document 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. Based on the required actions and the compliance time, EASA have decided to issue a Final AD with Request for Comments, postponing the pub l ic consultatio n process until after publication
. 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: Britten-Norman Aircraft Ltd, Commodore House, Mountbatten Business Centre, Millbrook Road East, Southampton S015 1HY, United Kingdom. E-mail info@bnaircraft.com
.

TE.CAP.OOll0-0 03 ©Euro pe an Aviat io n Safety Age ncy. All rights reserved. 2/2 Proprietary document
. Copies are not co ntrolled. Confirm rev ision status through the EASA·Internet/Intranet
.