AD 86-01-05

86-01-05 LOCKHEED-CALIFORNIA COMPANY: Amendment 39-5210. Applies to Lockheed Model L-1011-385 series airplanes, certificated in any category, equipped with Dynamic Controls Corporation oxygen initiator sequence timer switch(es), Part Numbers 11035-2/-3. Compliance is required as indicated, unless previously accomplished.

To prevent malfunction of the passenger oxygen system when activated, due to dormant shorted transient suppression capacitors in the oxygen initiator sequence timer switch(es), accomplish the following:

A. Within 30 days after the effective date of this AD, perform a resistance check of oxygen initiator sequence timer switch(es) in accordance with Lockheed Service Bulletin 093- 35/041, Part I, dated December 18, 1985, or later revisions approved by the Manager, Los Angeles Aircraft Certification Office, FAA, Northwest Mountain Region.

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

C. 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 information 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 the Los Angeles Aircraft Certification Office, 4344 Donald Douglas Drive, Long Beach, California.

This amendment becomes effective January 21, 1986.