AD 82-10-52 R1 ACTIVE

82-10-52 R1 LOCKHEED-CALIFORNIA COMPANY: Amendment 39-4671. Applies to Lockheed-California Model L-1011-385 series airplanes, certificated in all categories. Compliance required as indicated, unless previously accomplished.

A. To detect cracks and prevent structural failure of the Main Landing Gear (MLG) shock strut cylinder, accomplish the following:

1. For strut cylinders which have aluminum-nickel-bronze bushings installed as specified in Lockheed-California L-1011 Service Bulletin 093-32-131, Revision 3, dated October 26, 1977, or later revisions approved by the Manager, Los Angeles Aircraft Certification Office, conduct an initial inspection per Paragraphs C.1. or C.2. below within 30 calendar days after the effective date of this AD, or upon the accumulation of 7,500 flight hours time in service since the installation of the aluminum-nickel-bronze bushings, whichever is later. Thereafter, repeat the visual inspection specified in

Paragraph C.1. at intervalsnot to exceed 40 landings, or the ultrasonic inspection specified in Paragraph C.2. at intervals not to exceed 400 landings.

2. For strut cylinders not modified in accordance with Lockheed-California L-1011 Service Bulletins 093-32-211, dated October 5, 1982, or 093-32-131, Revision 3, dated October 26, 1977, or later revisions approved by the Manager, Los Angeles Aircraft Certification Office, inspect per Paragraph C.2. below, within 30 calendar days after the effective date of this AD. Thereafter, repeat the visual inspections specified in Paragraph C.1 at intervals not to exceed 40 landings, or the Ultrasonic inspection specified in Paragraph C.2. at intervals not to exceed 400 landings.

B. Operators who have already accomplished an initial inspection subsequent to April 20, 1982, in accordance with Paragraph C below, or in accordance with Lockheed-California Company Alert Service Bulletin Wire 093-32-A211, dated April 29, 1982, or in accordance with Telegraphic AD T82-10-52, have satisfied the initial inspection requirements of this amendment.

C. 1. Perform a close visual inspection for cracks at the exposed surfaces of the inboard retract actuator lug, on each MLG shock strut, per Section 2, Accomplishment Instructions, of Lockheed-California L-1011 Service Bulletin 093-32-A211, Revision 1, dated October 26, 1982, or later revisions approved by the Manager, Los Angeles Aircraft Certification Office. If there are any noticeable or suspected signs of cracks on the paint, remove both the paint and primer and reinspect the area for cracks.

2. Perform ultrasonic inspection of the inboard retract lugs of both the left and right MLG shock strut cylinder following the procedure specified in Section 2, Accomplishment Instructions, of Lockheed-California L-1011 Service Bulletin 093-32-A211, Revision 1, dated October 26, 1982, or later revisions approved by the Manager, Los Angeles Aircraft Certification Office.

D. Repair or replace the MLG shock strut cylinders found cracked before further flight, in accordance with Section 2, Accomplishment Instructions, of Lockheed-California L-1011 Service Bulletin 093-32-211, dated October 5, 1982, or later revisions approved by the Manager, Los Angeles Aircraft Certification Office.

E. Installation of stainless steel bushings in the inboard retract lugs of both the left and right MLG shock strut cylinder per Section 2, Accomplishment Instructions, of Lockheed- California L-1011 Service Bulletin 093-32-211, dated October 5, 1982, or later revisions approved by the Manager, Los Angeles Aircraft Certification Office, constitutes terminating action for the repetitive inspection requirements of Paragraphs A.1 and A.2.

F. Alternate means of compliance which provide an equivalent level of safety may be used when approved by the Manager, Los Angeles Aircraft Certification Office, FAA, Northwest Mountain Region.

G. 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 inspection requirements of this AD.

All persons affected by this directive who have not already received these documents from the manufacturer may obtain copies upon request to Lockheed-California Company, P.O. Box 551, Burbank, California 91520, Attention: Commercial Support Contracts, Dept. 63-11, U-33, B-1. These documents also may be examined at the FAA, Northwest Mountain Region, 17900 Pacific Highway South, Seattle, Washington; or 4344 Donald Douglas Drive, Long Beach, California.

This amendment becomes effective July 6, 1983, and was effective earlier to those recipients of Telegraphic AD T82-10-52, dated May 7, 1982.