# Britten-Norman Service Bulletin 332: Revision 1 - Rights: © Britten-Norman. Filed by the FAA in regulations.gov docket FAA-2013-0314; AD 2013-13-02 incorporates this document by reference. Not covered by OpenAirDocs’ CC0 dedication. - Document: [Britten-Norman Service Bulletin 332](https://openairdocs.org/service-documents/britten-norman/sb-332.md) - Title as filed: Britten Norman Service Bulletin 332 - Pages: 5 - PDF: https://openairdocs.org/files/sha256/b3/75/b3757d6fda842fd69c42b0a5d110829da74d40197a7ddb37c75cfdbf655fc43e - Page: https://openairdocs.org/service-documents/britten-norman/sb-332/file/b3757d6fda84 ## Text This text is OCR from a scan. OCR can misread letters and numbers. Each page's text from the PDF; open the PDF at a page with #page=N. ### Page 1 (OCR) SERVICE Britten-Norman N BULLETIN B-N Group Limited. BEMBRIDGE, Isle of Wight, United Kingdom PO35 5PR Models Affected Service Bulletin number All Islander BN2, BN2A and Trislander BN2A III BN2A III-I SB 332 aircraft. Issue 1 - 06/12/2012 Fuel Filler Cap Sealing 1 Compliance Statement Implement this highly recommended Service Bulletin at the earliest opportunity but within five (5) days of receipt of this Service Bulletin. 2 Introduction Preliminary investigations into a recent engine failure have attributed it 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 Service Bulletin requires the operator to perform an inspection of the aircraft fuel replenishment points on the upper surface of the wings to ensure that both the quick release fuel filler cap and the fuel filler receptacle are at the same modification state. 3 Applicability This Service Bulletin is applicable to all Islander BN2/BN2A and Trislander BN2A III/BN2A III-I aircraft. 4 Weight and Balance None. 5 Effect on Publications The Islander Aircraft Maintenance Manual (MM/1) will be amended to include an advisory Warning and an inspection procedure by normal revision action. The Trislander Aircraft Maintenance Manual (MM/2) will be amended to include an advisory Warning and an inspection procedure by normal revision action. Other publications including flight manuals are not affected by this bulletin. 06/12/2012 SB 332 Issue 1 Page 1 of 5 ### Page 2 (OCR) Service Bulletin 6 Action CAUTION Make the aircraft safe for maintenance. Place warning signs DO NOT CONNECT POWER SUPPLY and DO NOT START THE ENGINES. Put a maintenance platform adjacent to the aircraft wings. Examine the aircraft fuel replenishment points on the top surface of the wings, 4 Remove and examine each of the quick release fuel filler caps, ensure that the cap and the fuel filler receptacle are at the same modification state, Pre-mod NB-M-477 receptacle (Fig. 1) has a mainly circular flange attached to the wing skin. Post-mod NB-M-477 (Fig. 2) has a flange with a number of flat edges attached to the wing skin. If the fuel filler caps and the receptacles are at the same modification state, no further action is required. To aid identification of fuel filler cap modification status, it should be noted that Post-Mod NB-M-477 fuel filler caps are fitted with a quick-release key (see Fig. 2) whereas the Pre-Mod NB-M-477 fuel filler cap does not (see Fig. 1). If a mismatch of fuel filler cap and fuel filler receptacle is found, the correct quick release fuel filler cap must be fitted as soon as possible. To mitigate the risk of water contamination prior to fitting the correct fuel filler cap, pre-flight water contamination checks of the gascolators and fuel tank sump drains (including wing tip tanks, if fitted) must be performed in addition to the normal daily checks specified by the Maintenance Schedule MS/1 (Section 2: Check 'A' Inspection). 7 Refer to Section 8 of this Service Bulletin for the Part Numbers of both the pre- mod NB-M- 477 quick release fuel filler cap and the post-mod NB-M-477 quick release fuel filler cap and receptacle assembly. On completion of the inspection, refit the correct quick release fuel filler caps. Remove the maintenance platform and the warning signs. 10 Remove all tools, equipment and materials from the work area. Make sure the work area is clean. 11 Complete all documentation related to these actions. SB 332 06/12/2012 Page 2 of 5 Issue 1 ### Page 3 (OCR) Service Bulletin No Quick Release Key Fuel Filler Cap Bonding Peg Fuel Filler Receptacle Fig 1. Fuel Filler Cap Assembly Pre-Mod NB-M-477 06/12/2012 SB 332 Issue 1 Page 3 of 5 ### Page 4 (OCR) Service Bulletin Quick Release Key Fuel Filler Cap Fuel Filler Receptacle Bonding Peg Fig. 2 Fuel Filler Cap Assembly Post-Mod NB-M-477 SB 332 06/12/2012 Page 4 of 5 Issue 1 ### Page 5 (OCR) Service Bulletin Terminating Action This Service Bulletin is completed only after the fuel filler caps and receptacles have been confirmed to be at the same modification state, Britten-Norman Aircraft Limited expect that both port and starboard fuel filler caps and receptacles will be at the same modification standard which is recorded in the aircraft log book. 7 Manpower This Service Bulletin can be done by one person in less than 1 hour. 8 Provisioning Fuel Filler Cap Part Numbers: Pre-Mod NB-M-477 King Aircraft Filler cap and receptacle assembly C. 18563 Post-Mod NB-M-477 Shaw Aero Devices Fuel Filler Cap 416-1299 The necessary parts to install modification NB-M-477 can be obtained from Customer Services Department, B-N Group Ltd, Bembridge, Isle of Wight, PO35 5PR, United Kingdom. 9 Follow-on Action None. 10 Approval • Su Signed Date 6 " Decenhe 2012 ... BASA Approval Number EASA.21J.138 06/12/2012 SB 332 Issue 1 Page 5 of 5 --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain, except the copies of manufacturers’ service documents, which belong to their rights holders.