AD 74-25-11
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Lockheed Martin Corporation | L-1011-385-1 | LOCKHEED-CALIFORNIA Model L-1011-385-1 Series Airplanes |
Unsafe Condition
Incipient failure condition in the housing of the fire pull handle module assembly, P/N 1520324.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Adopt changes to the operator's operation manual: (1) Reschedule 'Fuel Tank Valve - Check Closed' as the first step before 'If warning persists after 30 seconds, discharge second bottle.' (2) Incorporate an operating limitation requiring APU auto-fire shutdown system to be armed during flight APU operation until SB 093-26-010, Part 2E is accomplished for APU fire pull handle P/N 1520324.
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Compliance Time
Within 72 hours of receipt of this AD.
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Affected Aircraft
Lockheed-CALIFORNIA Model L-1011-385-1 Series airplanes, certificated in all categories.
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Federal Register Abstract
Fire Pull Handle Module Assembly
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_74-25-11.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 74-25-11 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: LOCKHEED-CALIFORNIA Model L-1011-385-1 Series Airplanes Subject: Fire Pull Handle Module Assembly Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 12/16/1974 Make: Lockheed Martin Corporation Model: L-1011-385-1 Product Type: Aircraft Product Subtype: Large Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: Updated RGL applicability to match AD applicability; CAR C-11-185 AIRWORTHINESS DIRECTIVES FINAL RULES: 74-25-11 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-2042 AD NUMBER: 74-25-11 SUBJECT HEADING: LOCKHEED-CALIFORNIA Model L-1011-385-1 Series Airplanes ACTION: SUMMARY: DATES: Effective December 16, 1974. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 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. FOOTER:
Document Text
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AD Final Rules - DRS_74-25-11.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 74-25-11 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: LOCKHEED-CALIFORNIA Model L-1011-385-1 Series Airplanes Subject: Fire Pull Handle Module Assembly Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 12/16/1974 Make: Lockheed Martin Corporation Model: L-1011-385-1 Product Type: Aircraft Product Subtype: Large Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: Updated RGL applicability to match AD applicability; CAR C-11-185 AIRWORTHINESS DIRECTIVES FINAL RULES: 74-25-11 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-2042 AD NUMBER: 74-25-11 SUBJECT HEADING: LOCKHEED-CALIFORNIA Model L-1011-385-1 Series Airplanes ACTION: SUMMARY: DATES: Effective December 16, 1974. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 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. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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