AD 79-22-05
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Lockheed Martin Corporation | L-1011-385-1 | LOCKHEED CALIFORNIA Model L-1011-385 Series Airplanes |
| aircraft | Lockheed Martin Corporation | L-1011-385-1-14 | LOCKHEED CALIFORNIA Model L-1011-385 Series Airplanes |
| aircraft | Lockheed Martin Corporation | L-1011-385-1-15 | LOCKHEED CALIFORNIA Model L-1011-385 Series Airplanes |
| aircraft | Lockheed Martin Corporation | L-1011-385-3 | LOCKHEED CALIFORNIA Model L-1011-385 Series Airplanes |
Unsafe Condition
Delamination of forward and aft outflow valve gates could cause rapid loss of cabin pressurization in flight.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect forward and aft outflow valve gates within 800 hours' time in service after the effective date, and thereafter every 800 hours' time in service until modified. Replace defective gates with parts free from bond joint separation before further flight. Modify outflow valve assemblies within 2400 hours' time in service using Hamilton Standard Service Bulletin 21-1141.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 800 hours' time in service after the effective date of this AD and thereafter at intervals not to exceed 800 hours' time in service until modified; modify within 2400 hours' time in service after the effective date.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Lockheed California Model L-1011-385 series airplanes certificated in all categories, including models L-1011-385-1, L-1011-385-1-14, L-1011-385-1-15, and L-1011-385-3.
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Forward and Aft Outflow Valve Gates
Applicability Source Text
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AD Number:
79-22-05
Document Type:
AD Final Rules
Docket Number:
Unknown
Subject Heading:
LOCKHEED CALIFORNIA Model L-1011-385 Series Airplanes
Subject:
Forward and Aft Outflow Valve Gates
Status:
Current
Citation:
This information is not available.
Citation Publish Date:
Effective Date:
12/06/1979
Make:
Lockheed Martin Corporation
Model:
L-1011-385-1 | L-1011-385-1-14 | L-1011-385-1-15 | L-1011-385-3
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Superseded AD: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:
AIRWORTHINESS DIRECTIVES FINAL RULES: 79-22-05
CITATION: This information is not available.
PAGE NUMBER:
DOCKET NUMBER: Unknown
AMENDMENT: 39-3602
AD NUMBER: 79-22-05
SUBJECT HEADING: LOCKHEED CALIFORNIA Model L-1011-385 Series Airplanes
ACTION:
SUMMARY:
DATES: Effective December 6, 1979.
ADDRESSES:
FOR FURTHER INFORMATION CONTACT:
SUPPLEMENTARY INFORMATION:
REGULATORY TEXT:
79-22-05 LOCKHEED CALIFORNIA: Amendment 39-3602. Applies to Model L- 1011-385 series airplanes certificated in all categories.
Compliance required as indicated unless already accomplished.
To prevent rapid loss of cabin pressurization in flight, accomplish the following:
(a) Within 800 hours' time in service after the effective date of this AD and thereafter at intervals not to exceed 800 hours' time in service until modified in accordance with paragraph (b) of this AD, inspect forward and aft outflow valve gates for delamination in accordance with the instructions contained in Lockheed Service Bulletin No. 093-21-157 dated May 1, 1979, Section 2B ("Full inspection of outflow valves"). Gates found defective must be removed and replaced with a part free from bond joint separation prior to further flight.
(b) Within 2400 hours' time in service after the effective date of this AD, modify the outflow valve assemblies in accordance with Hamilton Standard Service Bulletin 21-1141 dated March 28, 1979.
(c) Special flight permits may be issued in accordance with FAR 21.197 and 21.199 to operate airplanes in pressurized flight to a base for the accomplishment of inspections or modifications required by this AD. No special flight permit is required to operate the airplane unpressurized to a base for the accomplishment of inspections or modifications required by this AD.
(d) Alternative inspections, modifications or other actions which provide an equivalent level of safety may be used when approved by the Chief, Aircraft Engineering Division, FAA Western Region.
This amendment becomes effective December 6, 1979.
FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_79-22-05.html
Copy URL
Print/Save as PDF
Document Versions
Feedback
Details
AD Number:
79-22-05
Document Type:
AD Final Rules
Docket Number:
Unknown
Subject Heading:
LOCKHEED CALIFORNIA Model L-1011-385 Series Airplanes
Subject:
Forward and Aft Outflow Valve Gates
Status:
Current
Citation:
This information is not available.
Citation Publish Date:
Effective Date:
12/06/1979
Make:
Lockheed Martin Corporation
Model:
L-1011-385-1 | L-1011-385-1-14 | L-1011-385-1-15 | L-1011-385-3
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:
AIRWORTHINESS DIRECTIVES FINAL RULES: 79-22-05
CITATION: This information is not available.
PAGE NUMBER:
DOCKET NUMBER: Unknown
AMENDMENT: 39-3602
AD NUMBER: 79-22-05
SUBJECT HEADING: LOCKHEED CALIFORNIA Model L-1011-385 Series Airplanes
ACTION:
SUMMARY:
DATES: Effective December 6, 1979.
ADDRESSES:
FOR FURTHER INFORMATION CONTACT:
SUPPLEMENTARY INFORMATION:
REGULATORY TEXT:
79-22-05 LOCKHEED CALIFORNIA: Amendment 39-3602. Applies to Model L- 1011-385 series airplanes certificated in all categories.
Compliance required as indicated unless already accomplished.
To prevent rapid loss of cabin pressurization in flight, accomplish the following:
(a) Within 800 hours' time in service after the effective date of this AD and thereafter at intervals not to exceed 800 hours' time in service until modified in accordance with paragraph (b) of this AD, inspect forward and aft outflow valve gates for delamination in accordance with the instructions contained in Lockheed Service Bulletin No. 093-21-157 dated May 1, 1979, Section 2B ("Full inspection of outflow valves"). Gates found defective must be removed and replaced with a part free from bond joint separation prior to further flight.
(b) Within 2400 hours' time in service after the effective date of this AD, modify the outflow valve assemblies in accordance with Hamilton Standard Service Bulletin 21-1141 dated March 28, 1979.
(c) Special flight permits may be issued in accordance with FAR 21.197 and 21.199 to operate airplanes in pressurized flight to a base for the accomplishment of inspections or modifications required by this AD. No special flight permit is required to operate the airplane unpressurized to a base for the accomplishment of inspections or modifications required by this AD.
(d) Alternative inspections, modifications or other actions which provide an equivalent level of safety may be used when approved by the Chief, Aircraft Engineering Division, FAA Western Region.
This amendment becomes effective December 6, 1979.
FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
This site is not affiliated with or endorsed by the FAA. Always verify with official sources.
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