Airworthiness Directive · Amendment 39-14883 · Bombardier Model DHC-8-100, -200, and -300 Series Airplanes
Bombardier Model DHC-8-100, -200, and -300 Series Airplanes
This AD applies to Bombardier Model DHC-8-100, -200 and -300 series airplanes, certificated in any category; equipped with a flight compartment door installation having part number (P/N) 82510074-(*), 82510294-(*), 82510310-001, 8Z4597-001, H85250010-(*), 82510700-(*), or 82510704-(*); except P/Ns 82510704-502 and 82510704-503.
Note 1: (*) denotes all dash numbers.
The FAA is superseding an existing airworthiness directive (AD), which applies to certain Bombardier Model DHC-8-100, -200, and - 300 series airplanes. That AD currently requires modification of the flight compartment door; repetitive inspections for wear of the flight compartment door hinges following modification; and repair or replacement of the hinges with new hinges if necessary. This new AD requires using revised procedures for modifying and inspecting the flight compartment door and reduces the applicability of the existing AD. This AD results from a determination that certain cockpit doors are no longer subject to the existing requirements. We are issuing this AD to prevent failure of the alternate release mechanism of the flight compartment door, which could delay or impede the evacuation of the flightcrew during an emergency. This failure also could result in the flightcrew not being able to assist passengers in the event of 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.
Except as required by paragraph (g) of this AD: Within 90 days after May 12, 1999 (the effective date of AD 99-08-04), modify the lower hinge assembly and main door latch (Modification 8/2337) of the flight compartment door, in accordance with Bombardier Service Bulletin S.B. 8-52-39, Revision ‘D,’ dated February 27, 1998; or Revision ‘H,’ dated September 9, 2004. After the effective date of this AD, only Revision ‘H’ may be used for accomplishing the modification.
(g) For airplanes on which the modification required by paragraph (f) of this AD was done before the effective date of this AD in accordance with Bombardier Service Bulletin S.B. 8-52-39, dated August 30, 1996; or Revision ‘A,’ dated October 31, 1996: Within 90 days after the effective date of this AD, do the modification required by paragraph (f) of this AD in accordance with Bombardier Service Bulletin 8-52-39, Revision ‘H,’ dated September 9, 2004.
Within 800 flight hours after doing the modification required by paragraph (f) or (g) of this AD, as applicable: Inspect the hinge areas around the hinge pin holes of the flight compartment door for wear in accordance with Bombardier Service Bulletin S.B. 8-52-39, Revision ‘D,’ dated February 27, 1998; or Revision ‘H,’ dated September 9, 2004. After the effective date of this AD, only Revision ‘H’ may be used for accomplishing the inspection.
(1) If no wear is detected, or if the wear is less than or equal to 0.020 inch in depth, repeat the inspection thereafter at intervals not to exceed 800 flight hours.
(2) If any wear is detected and its dimension around the hinge pin holes is less than 0.050 inch and greater than 0.020 inch in depth, prior to further flight, perform the applicable corrective actions specified in the service bulletin. Repeat the inspection thereafter at intervals not to exceed 800 flight hours.
(3) If any wear is detected and its dimension around the hinge pin holes is greater than or equal to 0.050 inch in depth, prior to further flight, replace the worn hinges with new hinges in accordance with the service bulletin. Repeat the inspection thereafter at intervals not to exceed 800 flight hours.
(i) Modifications and inspections done before the effective date of this AD in accordance with Bombardier Service Bulletin S.B. 8-52-39, Revision ‘B,’ dated July 4, 1997; Revision ‘C,’ dated August 1, 1997; Revision ‘E,’ dated May 10, 1999; Revision ‘F,’ dated February 4, 2000; or Revision ‘G,’ dated May 17, 2001; are considered acceptable for compliance with the modification and inspections required by this AD.
