AD 90-07-01

90-07-01 BRITISH AEROSPACE: Amendment 39-6550. Docket No. 89-NM-229-AD.

Applicability: Model BAe 146-100A series airplanes, Serial Numbers E1002 through E1100, E1102, and E1103; Model BAe 146-200A series airplanes, Serial Numbers E2012 through E2113, E2115 and E2118; and Model BAe 146-300A series airplanes, Serial Numbers E3118 through E3123 and E3125; certificated in any category.

Compliance: Required within 30 days after the effective date of this AD, unless previously accomplished.

To prevent loss of asymmetry protection and loss of airplane controllability, accomplish the following:

A. Install a warning placard on shelf No. 5 beneath the flap computer, in accordance with British Aerospace Service Bulletin 11-36-01104A&B, dated May 10, 1989, stating:

WARNING - THIS EQUIPMENT MUST NOT BE REMOVED OR RE-RACKED IN FLIGHT

B. Install a warning placard on circuit breaker panel 131-11-00, in accordance with British Aerospace Service Bulletin 11-36-01104A&B, dated May 10, 1989, stating:

WARNING

C/BREAKERS MUST NOT BE PULLED IN FLIGHT.

C. An alternate means of compliance or adjustment of the compliance time, which provides an acceptable level of safety, may be used when approved by the Manager, Standardization Branch, ANM-113, FAA, Northwest Mountain Region.

NOTE: The request should be forwarded through an FAA Principal Maintenance Inspector (PMI), who will either concur or comment and then send it to the Manager, Standardization Branch, ANM-113.

D. Special flight permits may be issued in accordance with FAR 21.197 and 21.199 to operate airplanes to a base in order to comply with the requirements of this AD.

All persons affected by this directive who have not already received the appropriate service documents from the manufacturer may obtain copies upon request to British Aerospace, Librarian for Service Bulletins, P.O. Box 17414, Dulles International Airport, Washington, D.C. 20041. These documents may be examined at the FAA, Northwest Mountain Region, Transport Airplane Directorate, 17900 Pacific Highway South, Seattle, Washington, or the Standardization Branch, 9010 East Marginal Way South, Seattle, Washington.

This amendment (39-6550, AD 90-07-01) becomes effective on April 30, 1990.