AD 83-05-08 R1 ACTIVE

83-05-08 R1 BRITISH AEROSPACE, AIRCRAFT GROUP, SCOTTISH DIVISION: Amendment 39-4582 as amended by Amendment 39-4724. Applies to Model HP.137 Jetstream MK-1 and Series 200 airplanes (all serial numbers) certificated in any category.

COMPLIANCE: Required as indicated, unless already accomplished.

To detect defective fuel filter bleed pipe Non-Return-Valve (NRV) Part Number (P/N) 702CD02, unless accomplished in the previous 200 hours time-in-service, within the next 20 hours time-in-service after the effective date of this AD and thereafter at intervals not to exceed 200 hours time-in-service, accomplish the following:

a) Remove, inspect, and test the fuel filter bleed pipe NRV P/N 702CD02 for correct operation in accordance with the "Action" section of Scottish Aviation Limited Jetstream SB No. 18/3 Revision 1, March 31, 1983.

NOTE: SB No. 18/3, Revision 1, specifies a detailed test procedure to verify that the valve operates as intended.

b) If a defective NRV is found, replace the valve prior to further flight.

c) The intervals between the repetitive inspections required by this AD may be adjusted up to 10 percent of the specified interval to allow accomplishing these inspections concurrent with other scheduled maintenance of the airplane.

d) The inspections required by paragraph a) of this AD are no longer required when British Aerospace Modification No. 5179 is installed.

e) Aircraft may be flown in accordance with FAR 21.197 to a location where this AD can be accomplished.

f) An equivalent method of compliance with this AD if used must be approved by the Manager, Aircraft Certification Staff, AEU-100, Europe, Africa, and Middle East Office, FAA, c/o American Embassy, 1000 Brussels, Belgium.

Amendment 39-4582 became effective on March 17, 1983.

This Amendment 39-4724 becomes effective September 23, 1983.