Airworthiness Directive · Amendment 39-18946 · Equipment/furnishings
Bombardier, Inc., Airplanes
This AD applies to Bombardier, Inc., Model DHC-8-401 and DHC-8-402 airplanes, certificated in any category, as identified in Bombardier Service Bulletin 84-25-169, Revision B, dated February 17, 2017.
We are adopting a new airworthiness directive (AD) for certain Bombardier, Inc., Model DHC-8-401 and DHC-8-402 airplanes. This AD was prompted by a report that a pilot was unable to move the rudder pedal due to an obstruction. This AD requires an inspection to determine if wiring shrouds are present, and modifying the wiring shrouds if necessary. We are issuing this AD to address the unsafe condition on these products.
Within 6 months after the effective date of this AD, do a one-time inspection to determine if wiring shrouds are installed, in accordance with paragraph 3.B., “Procedure,” of the Accomplishment Instructions of Bombardier Service Bulletin 84-25-169, Revision B, dated February 17, 2017.
(1) If the airplane does not have wiring shrouds installed, no further action is required by this AD.
(2) If the airplane has wiring shrouds installed, before further flight, modify the wiring shrouds in accordance with paragraph 3.B., “Procedure,” of the Accomplishment Instructions of Bombardier Service Bulletin 84-25-169, Revision B, dated February 17, 2017.
Note 1 to paragraph (g) of this AD: Installation of wiring shrouds was provided in Bombardier Modification Summary Package (ModSum) IS4Q2500035-1, Revision A, dated July 26, 2011; Revision B, dated October 10, 2013; Revision C, dated March 26, 2014; or Revision D, dated February 26, 2016; or ModSum IS4Q2500035-2, Revision A, dated July 26, 2011; Revision B, dated October 10, 2013; Revision C, dated March 26, 2014; or Revision D, dated February 26, 2016.
