Airworthiness Directive · Amendment 39-14529 · Bombardier Model DHC-8-301, -311, and -315 Airplanes
Bombardier Model DHC-8-301, -311, and -315 Airplanes
This AD applies to Bombardier Model DHC-8-301, -311, and -315 airplanes, certificated in any category, serial numbers 100 through 593 inclusive.
The FAA is adopting a new airworthiness directive (AD) for certain Bombardier Model DHC-8-301, -311, and -315 airplanes. This AD requires replacing the pressure control valve of the Type 1 emergency door. This AD results from reports that the pressure control valve of the Type 1 emergency door is susceptible to freezing. We are issuing this AD to ensure that the pressure control valve does not freeze and prevent the door seal from deflating, which could result in the inability to open the door in an emergency.
You are responsible for having the actions required by this AD performed within the compliance times specified, unless the actions have already been done.
Within 30 months after the effective date of this AD, replace the pressure control valve of the Type 1 emergency door by incorporating ModSum 8Q101159 in accordance with the Accomplishment Instructions of Bombardier Service Bulletin 8-52-60, Revision A, dated April 28, 2003.
Replacing the pressure control valve of the Type 1 emergency door is also acceptable for compliance with the requirements of paragraph (f) of this AD if done before the effective date of this AD in accordance the Accomplishment Instructions of Bombardier Service Bulletin 8-52-60, dated August 28, 2002.
