EASA 

EASA AD No.: 2012-0270 

AIRWORTHINESS DIRECTIVE 

AD No.: 2012-0270 

Date: 20 December 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 EU 748/2012, Part 21A.3B. In accordance with EC 204212003 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 r'equirements of that AD, unless otherwise specified by the Agency [EC 

204212003 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: Type/Model designation(s): 

BRITTEN-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- Inspection 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 

Preliminary 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 resulting in in-flight shut down of the engine. 

For the reasons described above, this AD requires a one-time inspection of the 

fuel filler 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 also 

requires daily pre-flight water contamination checks. 

03 January 2013 

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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 fuel 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 this AD, a 

mismatch is found, 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 gascolators 

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. Publications: 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 

public consultation 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 1 HY, United Kingdom. 

E-mail info@bnaircraft.com. 

TE.CAP.OOll0-003 ©European Aviation Safety Agency. All rights reserved. 2/2 

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