Airworthiness Directive · Amendment 39-18236 · Landing gear
Bombardier, Inc. Airplanes
This AD applies to Bombardier, Inc. Model DHC-8-400, -401, and -402 airplanes, certificated in any category, serial numbers (S/N) 4001 through 4419 inclusive.
We are adopting a new airworthiness directive (AD) for certain Bombardier, Inc. Model DHC-8-400, -401, and -402 airplanes. This AD was prompted by a report of a main landing gear (MLG) parking brake becoming dislodged from its mounting bracket due to an improperly installed quick release pin of the hand pump lever. This AD requires removing the hand pump lever of the parking brake from the right-hand side nacelle. We are issuing this AD to prevent an unsecured lever from migrating from its stowed position, fouling against the MLG, and subsequently puncturing the nacelle structure, which could adversely affect the safe landing of the airplane.
Within 3,000 flight hours or 18 months after the effective date of this AD, whichever occurs first: Incorporate Bombardier ModSum 4-113803 by removing the hand pump lever of the parking brake from the right-hand side nacelle, in accordance with the Accomplishment Instructions of Bombardier Service Bulletin 84-32-118, dated April 8, 2014.
Note 1 to paragraph (g) of this AD: Re-installing the hand pump lever of the parking brake to the right-hand side equipment bay (Bombardier ModSum 4-113804) may be done at the operator's discretion.
Incorporation of ModSum 4-113723 by re-locating the hand pump lever of the parking brake from the right-hand side nacelle to the right-hand side equipment bay, in accordance with the Accomplishment Instructions of Bombardier Service Bulletin 84-32-99, Revision A, dated October 2, 2012, is acceptable for compliance with the modification specified in paragraph (g) of this AD, provided the incorporation of ModSum 4-113723 is done within the compliance time specified in paragraph (g) of this AD.
