Airworthiness Directive · Amendment 39-17490 · Fuel
B-N Group Ltd. Airplanes
This AD applies to B-N Group Ltd. Models BN-2, BN-2A, BN2A MK. III, BN2A MK. III-2, BN2A MK. III-3, BN-2A-2, BN-2A-20, BN-2A-21, BN-2A-26, BN-2A-27, BN-2A-3, BN-2A-6, BN-2A-8, BN-2A-9, BN-2B-20, BN-2B-21, BN-2B-26, BN-2B-27, BN-2T, and BN-2T-4R airplanes, all serial numbers, certificated in any category.
We are adopting a new airworthiness directive (AD) for all B-N Group Ltd. Models BN-2, BN-2A, BN2A MK. III, BN2A MK. III-2, BN2A MK. III-3, BN-2A-2, BN-2A-20, BN-2A-21, BN-2A-26, BN-2A-27, BN-2A-3, BN-2A- 6, BN-2A-8, BN-2A-9, BN-2B-20, BN-2B-21, BN-2B-26, BN-2B-27, BN-2T, and BN-2T-4R airplanes. This AD results from mandatory continuing airworthiness information (MCAI) issued by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as inadequate sealing of the fuel filler cap (fuel tank cap) and the fuel filler receptacle (fuel tank opening), which could lead to contaminated fuel and result in in-flight shutdown of the engine. We are issuing this AD to require actions to address the unsafe condition on these products.
Unless already done, do the following actions as specified in paragraphs (f)(1) through (f)(5) of this AD:
(1) Within the next 30 days after August 1, 2013 (the effective date of this AD), inspect the aircraft fuel replenishment points on the top surface of the wings to determine that the fuel filler cap (fuel tank cap) matches the fuel filler receptacle (fuel tank opening) following the instructions of paragraph 6 of Britten-Norman Service Bulletin Number SB 332, Issue 1, dated December 6, 2012.
(2) If a mismatch of the fuel filler cap and the fuel filler receptacle is found during the inspection required by paragraph (f)(1) of this AD, within 3 calendar months after August 1, 2013 (the effective date of this AD), install the correct fuel filler cap to match the fuel filler receptacle installed on the airplane following the instructions of paragraph 6 of Britten-Norman Service Bulletin Number SB 332, Issue 1, dated December 6, 2012.
(3) If a mismatch of the fuel filler cap and the fuel filler receptacle is found during the inspection required by paragraph (f)(1) of this AD, before further flight and thereafter during each daily pre-flight check, do water contamination checks of the gascolators and fuel tank sump drains, including those of the wing tip tanks if installed. This check is in addition to the normal daily checks already required.
(4) The modification required by paragraph (f)(2) of this AD terminates the daily pre-flight water contamination checks as specified in paragraph (f)(3) of this AD.
(5) After August 1, 2013 (the effective date of this AD), do not install on any airplane a fuel filler cap that does not match the fuel filler receptacle and has the correct seal.
