Airworthiness Directive · Amendment 39-16222 · Wings
Bombardier Model DHC-8-102, DHC-8-103, DHC-8-106, DHC-8-201, and DHC-8-202 Series Airplanes
This AD applies to Bombardier Model DHC-8-102, DHC-8-103, DHC-8-106, DHC-8-201, and DHC-8-202 series airplanes; certificated in any category; serial numbers 003 through 663 inclusive.
We are adopting a new airworthiness directive (AD) for the products listed above. This AD results from mandatory continuing airworthiness information (MCAI) originated 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) For airplanes on which Bombardier Modification 8/0024 has not been done: Within 18 months after the effective date of this AD, perform a functional check of the dielectric properties of the fuel tank skin between Yw171.20 and Yw261.00 of the upper and lower wing for aluminum-loaded primer and aluminum-loaded enamel coating, in accordance with the Accomplishment Instructions of Bombardier Service Bulletin 8-57-46, Revision A, dated February 6, 2009.
(2) For airplanes on which Bombardier Modification 8/0024 has been done: Within 18 months after the effective date of this AD, perform a functional check of the dielectric properties of the fuel tank skin between Yw171.20 and Yw261.00 of the upper wing for aluminum-loaded primer and aluminum-loaded enamel coating, in accordance with the Accomplishment Instructions of Bombardier Service Bulletin 8-57-46, Revision A, dated February 6, 2009.
(3) If the functional check required by paragraph (f)(1) or (f)(2) of this AD indicates that the aluminum-loaded primer and aluminum-loaded enamel coating have been properly applied, as defined in the Accomplishment Instructions of Bombardier Service Bulletin 8-57-46, Revision A, dated February 6, 2009: Before further flight, restore the protective finish on the areas where the surface finish was removed for the functional check, in accordance with the Accomplishment Instructions of Bombardier Service Bulletin 8-57-46, Revision A, dated February 6, 2009.
(4) If the functional check required by paragraph (f)(1) or (f)(2) of this AD indicates that the aluminum-loaded primer and aluminum-loaded enamel coating have not been applied or have not been properly applied, as defined in the Accomplishment Instructions of Bombardier Service Bulletin 8-57-46, Revision A, dated February 6, 2009: Perform the actions required by paragraphs (f)(4)(i), (f)(4)(ii), and (f)(4)(iii) of this AD, in accordance with the Accomplishment Instructions of Bombardier Service Bulletin 8-57-46, Revision A, dated February 6, 2009.
(i) Before further flight, strip the affected wing skin surfaces to bare metal and apply alodine coating to those areas, in accordance with Bombardier Service Bulletin 8-57-46, Revision A, dated February 6, 2009.
(ii) Within 90 flight hours after performing the actions required by paragraph (f)(4)(i) of this AD, and thereafter at intervals not to exceed 90 flight hours: Perform a detailed visual inspection of the stripped areas for any sign of corrosion or deterioration of the protective alodine coating, and re-apply the protective alodine coating, in accordance with Bombardier Service Bulletin 8-57-46, Revision A, dated February 6, 2009.
(iii) Within 3 months after performing the actions required by paragraph (f)(1) or (f)(2) of this AD, as applicable: Paint the affected wing skin surfaces with aluminum-loaded primer and aluminum-loaded enamel coating, in accordance with Bombardier Service Bulletin 8-57-46, Revision A, dated February 6, 2009.
(5) Accomplishment of the actions required by paragraph (f)(1) or (f)(2) of this AD, as applicable, before the effective date of this AD, in accordance with Bombardier Service Bulletin 8-57-46, dated September 29, 2008, is acceptable for compliance with the corresponding requirements of this AD.
(6) Accomplishment of the actions required by paragraph (f)(1) or (f)(2) of this AD, as applicable, in accordance with AD 2008-13-09, Amendment 39-15572, is acceptable for compliance with the corresponding requirements of this AD, provided the actions are done within the applicable compliance times specified in this AD.
Note 1: This AD differs from the MCAI and/or service information as follows: No differences.
