AD 74-25-11

74-25-11 LOCKHEED-CALIFORNIA: Amendment 39-2042. Applies to L-1011-385-1 Series airplanes, certificated in all categories.

Compliance required as indicated.

To provide protection in the event of unknown incipient failure condition in the housing of the fire pull handle module assembly, P/N 1520324, accomplish the following:

Within 72 hours of receipt of this AD, adopt the following changes to the operator's operation manual, or its equivalent.

(1) Change the EMERGENCY OPERATING PROCEDURES section to read, in pertinent part: 'Engine Fire or Severe Damage.' Reschedule reference step "Fuel Tank Valve - Check Closed" to be accomplished as the first referenced item prior to, "If warning persists after 30 seconds, discharge second bottle." NOTE: The manufacturer is issuing a revision to the FAA- approved airplane flight manual which covers the same subject.

(2) Incorporate and comply with the following operating limitation: "Any APU operation in flight shall be with the APU auto-fire shutdown system armed and operative", until Lockheed Service Bulletin 093-26-010, Part 2E, has been accomplished for the APU fire pull handle, P/N 1520324.

This amendment is effective December 16, 1974, and was effective November 20, 1974, for all recipients of the telegram dated November 20, 1974, which contained this amendment.