Airworthiness Directive · Amendment 39-16618 · Flight controls
B-N Group Ltd. Model BN-2, BN-2A, BN-2A-2, BN-2A-3, BN-2A-6, BN-2A-8, BN-2A-9, BN-2A-20, BN-2A-21, BN-2A-26, BN-2A-27, BN-2B-20, BN-2B-21, BN-2B-26, BN-2B-27, BN-2T, and BN-2T-4R Airplanes
This AD applies to B-N Group Ltd. Models BN-2, BN-2A, BN-2A-2, BN-2A-3, BN-2A-6, BN-2A-8, BN-2A-9, BN-2A-20, BN-2A-21, BN-2A-26, BN-2A-27, 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 the products listed above. 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:
Unless already done, do the following actions:
(1) Before further flight after April 26, 2011 (the effective date of this AD), visually inspect for deformation of shape and signs of concavity the elevator tip assemblies (top and bottom surfaces) as instructed in paragraphs 6 and 9 of Britten-Norman Aircraft Limited Service Bulletin Number BN-2/SB 313, Issue 3, dated February 24, 2009. If no sign of deformity or concavity is found as a result of the inspection required by paragraph (f)(1) of this AD, no further action is required by this AD except for the requirements of paragraph (f)(3) of this AD.
(2) If signs of deformation or concavity are found, before further flight, inspect for delamination the elevator tip as instructed in paragraph 9 of Britten-Norman Aircraft Limited Service Bulletin Number BN-2/SB 313, Issue 3, dated February 24, 2009.
(i) If delamination is found as a result of any inspection required by this AD, before further flight, replace the elevator tip with a serviceable elevator tip following Britten-Norman Ltd. Drawing NB-31-235, Issue 13; Britten-Norman Ltd. Drawing NB-31-873, Issue 2; or Britten-Norman Ltd. Drawing NB-0906, Issue 3, as applicable to airplane models.
(ii) If no delamination is found as a result of any inspection required by this AD, at intervals not to exceed 50 hours time-in-service (TIS) and until accomplishment of paragraph (f)(2)(iii) of this AD, inspect for delamination the elevator tip as instructed in paragraph 9 of Britten-Norman Aircraft Limited Service Bulletin Number BN-2/SB 313, Issue 3, dated February 24, 2009.
(iii) Within 12 months after the effective date of this AD, unless already done as required by paragraph (f)(2)(i) of this AD, replace the elevator tip with a serviceable elevator tip following Britten-Norman Ltd. Drawing NB-31-235, Issue 13; Britten-Norman Ltd. Drawing NB-31-873, Issue 2; or Britten-Norman Ltd. Drawing NB-31-0906, Issue 3, as applicable to airplane models.
(3) After April 26, 2011 (the effective date of this AD), do not install elevator tips on any airplane, unless they have already been inspected in accordance with Britten-Norman Aircraft Limited Service Bulletin Number BN-2/SB 313, Issue 3, dated February 24, 2009, and determined to be free from concavity and delamination.
Note: This AD differs from the MCAI and/or service information as follows: No differences.
