Airworthiness Directive · Amendment 39-11778 · Fokker Model F27 Mark 050, 100, 200, 300, 400, 500, 600, and 700 Series Airplanes; and Model F28 Mark 0070, 0100, 1000, 2000, 3000, and 4000 Series Airplanes
Fokker Model F27 Mark 050, 100, 200, 300, 400, 500, 600, and 700 Series Airplanes; and Model F28 Mark 0070, 0100, 1000, 2000, 3000, and 4000 Series Airplanes
Model F27 Mark 050, 100, 200, 300, 400, 500, 600, and 700 series airplanes; and Model F28 Mark 0070, 0100, 1000, 2000, 3000, and 4000 series airplanes; certificated in any category; on which any Pacific Scientific Model 0108900 series flight crew shoulder harness assembly is installed.
Note 1: This AD applies to each airplane identified in the preceding applicability provision, regardless of whether it has been modified, altered, or repaired in the area subject to the requirements of this AD. For airplanes that have been modified, altered, or repaired so that the performance of the requirements of this AD is affected, the owner/operator must request approval for an alternative method of compliance in accordance with paragraph (b) of this AD. The request should include an assessment of the effect of the modification, alteration, or repair on the unsafe condition addressed by this AD; and, if the unsafe condition has not been eliminated, the request should include specific proposed actions to address it.
This amendment adopts a new airworthiness directive (AD), applicable to certain Fokker Model F27 Mark 050, 100, 200, 300, 400, 500, 600, and 700 series airplanes, and Model F28 Mark 0070, 0100, 1000, 2000, 3000, and 4000 series airplanes, that requires a one-time functional test to verify correct installation of the shoulder harnesses of the pilot's and co-pilot's seats and, if necessary, replacement of the shoulder harness assembly with a new or serviceable shoulder harness assembly. This amendment is prompted by issuance of mandatory continuing airworthiness information by a foreign civil airworthiness authority. The actions specified by this AD are intended to prevent failure of the shoulder harness, which could result in injury to the flight crew during extremely turbulent flight conditions or during emergency landing or stopping conditions.
To prevent failure of the shoulder harness, which could result in injury to the flight crew during extremely turbulent flight conditions or during emergency landing or stopping conditions, accomplish the following:
(a) Within 6 months after the effective date of this AD, perform a one-time functional test to verify correct installation of the shoulder harnesses of the pilot's and co-pilot's seats, in accordance with paragraph (a)(1), (a)(2), (a)(3), or (a)(4) of this AD, as applicable. If any shoulder harness is incorrectly installed, prior to further flight, replace the shoulder harness assembly with a new or serviceable shoulder harness assembly, in accordance with paragraph (a)(1), (a)(2), (a)(3), or (a)(4) of this AD, as applicable.
(1) For Model F27 Mark 050 series airplanes: Accomplish the actions in accordance with Fokker Service Bulletin SBF50-25-051, dated October 14, 1999.
(2) For Model F27 Mark 100, 200, 300, 400, 500, 600, and 700 series airplanes: Accomplish the actions in accordance with Fokker Service Bulletin SBF27/25-65, Revision 1, dated March 1, 2000.
(3) For Model F28 Mark 0070 and 0100 series airplanes: Accomplish the actions in accordance with Fokker Service Bulletin SBF100-25-088, dated October 14, 1999.
(4) For Model F28 Mark 1000, 2000, 3000, and 4000 series airplanes: Accomplish the actions in accordance with Fokker Service Bulletin SBF28/25-103, dated October 14, 1999.
Note 2: Accomplishment of the actions in accordance with Fokker Service Bulletin SBF27/25-65, dated October 14, 1999, is acceptable for compliance with the requirements of paragraph (a)(2) of the AD.
