Airworthiness Directive · Amendment 39-11975 · British Aerospace Model BAC 1-11 401/AK and 410/AQ Airplanes
British Aerospace Model BAC 1-11 401/AK and 410/AQ Airplanes
All Model BAC 1-11 401/AK and 410/AQ airplanes, certificated in any category.
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 (c) 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 all British Aerospace Model BAC 1-11 401/AK and 410/AQ airplanes, that requires replacement of certain landing gear brake accumulators with improved accumulators. The actions specified by this AD are intended to prevent loss of hydraulic pressure and possible structural damage to the airplane due to failure of the accumulator. This action is intended to address the identified unsafe condition.
To prevent loss of hydraulic pressure and possible structural damage to the airplane due to failure of the landing gear brake accumulator, accomplish the following:
(a) Within 10 months after the effective date of this AD, replace any Parker landing gear brake accumulator having part number (P/N) 1356-653562 with an accumulator having P/N 1356-653562M2, in accordance with British Aerospace Service Bulletin 32-PM6054, dated February 2000.
Note 2: The British Aerospace service bulletin references Parker Service Bulletin 1356-653562-32-100, dated September 23, 1999, as an additional source of service information for accomplishment of the replacement.
(b) As of the effective date of this AD, no Parker landing gear brake accumulator having P/N 1356-653562 shall be installed on any airplane.
