Airworthiness Directive · Amendment 39-15389 · Lights
Bombardier Model DHC-8-102, DHC-8-103, DHC-8-106, DHC-8-201, DHC-8-202, DHC-8-301, DHC-8-311, and DHC-8-315 Airplanes, and Model DHC-8-400 Series Airplanes
This AD applies to Bombardier Model DHC-8-102, DHC-8-103, DHC-8-106, DHC-8-201, DHC-8-202, DHC-8-301, DHC-8-311, and DHC-8-315 airplanes, serial numbers 003 through 639; and Model DHC-8-400 series airplanes, serial numbers 4003, 4004, 4006, and 4008 through 4149; 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) 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:
Within 18 months after the effective date of this AD, unless already done, do the following actions.
(1) For Model DHC-8-102, DHC-8-103, DHC-8-106, DHC-8-201, DHC-8-202, DHC-8-301, DHC-8-311, and DHC-8-315 airplanes: Install Bombardier Modsum 8Q101603 to replace the affected carbon molded resistive element potentiometers with wire-wound type potentiometers for both the pilot and co-pilot utility lights, in accordance with the Accomplishment Instructions of Bombardier Service Bulletin 8-33-53, Revision A, dated March 14, 2007.
(2) For Model DHC-8-400 series airplanes: Install Bombardier Modsum 4-126381 to replace the affected carbon molded resistive element potentiometers with wire-wound type potentiometers for the pilot, co-pilot, and observer utility lights, in accordance with the Accomplishment Instructions of Bombardier Service Bulletin 84-33-10, Revision A, dated March 14, 2007.
(3) Actions done before the effective date of this AD in accordance with Bombardier Service Bulletin 8-33-53 or 84-33-10, both dated December 1, 2006, as applicable, are considered acceptable for compliance with the corresponding actions specified in this AD.
Note: This AD differs from the MCAI and/or service information as follows: No difference.
