89-20-10 BRITISH AEROSPACE: Amendment 39-6332. (Docket No. 89-NM-35-AD)
Applicability: British Aerospace Model BAe 146 series airplanes, certificated in any category.
Compliance Required as indicated, unless previously accomplished.
To prevent loss of control of the airplane on the ground, accomplish the following:
A. Within 100 landings after the effective date of this AD, or within 100 landings after the last inspection accomplished in accordance with AD 88-22-05, Amendment 39-6047, whichever occurs later, check the torque on and mark the nose wheel steering cuff ring nut, in accordance with the procedures in paragraph 2.A. of British Aerospace Service Bulletin 32-A95, Revision 1, dated December 2, 1988.
1. If the ring nut torque loading is found to be incorrect, prior to further flight, re-torque in accordance with paragraph 2.A.(2) of the service bulletin, and reinspect in accordance with paragraph 2.B. of the service bulletin within 30 days andthereafter at intervals not to exceed 300 landings.
2. If the ring nut torque loading is found to be within the limits specified in the service bulletin, repeat the inspections in accordance with paragraph 2.B. of British Aerospace Service Bulletin 32-A95, Revision 1, dated December 2, 1988, at intervals not to exceed 300 landings.
NOTE: Paragraph 2.A. of British Aerospace Service Bulletin 32-A95 refers to British Aerospace Service Bulletin 32-29 for checking the steering friction damper torque.
B. Within 2,800 landings after the effective date of this AD, modify the nose wheel steering ring nut locking means in accordance with British Aerospace Modification Service Bulletin 32-95-70409A, dated December 12, 1988. Installation of this modification constitutes terminating action for the inspection requirements of this AD.
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 PLC, 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 AD supersedes AD 88-22-05, Amendment 39-6047, which became effective on November 8, 1988.
This amendment (39-6332, AD 89-20-10) becomes effective on October 30, 1989.