AD 60-04-03
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Lockheed Martin Corporation | 188A | LOCKHEED All Model L-188 Airplanes |
| aircraft | Lockheed Martin Corporation | 188C | LOCKHEED All Model L-188 Airplanes |
Unsafe Condition
Fatigue failures of front Lord engine mounts of old design in the web and fillet areas.
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Required Actions
Inspect mounts for cracks in web and fillet areas upon next arrival at maintenance facility and repeat inspections at intervals not exceeding 50 flight hours. Replace cracked mounts immediately with LM-204A-SA5/Lockheed P/N 632182-9. Replace all LM-204A-SA4 mounts with LM-204A-SA5 within 300 flight hours after first inspection but not later than March 1, 1960. Modify all spare quick engine change units with new SA5 mounts before installation.
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Compliance Time
Within the time specified: inspections must be done upon next arrival at scheduled stop with maintenance facilities, and repeated within 50 flight hours. Replacement of all LM-204A-SA4 mounts must occur within 300 flight hours after first inspection or by March 1, 1960.
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Affected Aircraft
Lockheed Martin Corporation models 188A and 188C equipped with Lord engine mounts number LM-204A-SA4.
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Federal Register Abstract
Engine Mounts
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_60-04-03.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 60-04-03 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: LOCKHEED All Model L-188 Airplanes Subject: Engine Mounts Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: Lockheed Martin Corporation Model: 188A | 188C Product Type: Aircraft Product Subtype: Large Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 60-04-03 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 60-04-03 SUBJECT HEADING: LOCKHEED All Model L-188 Airplanes ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 60-04-03 LOCKHEED: Amdt. 100 Part 507 Federal Register February 9, 1960. Applies to All Model L-188 Airplanes Equipped With Lord Engine Mounts Number LM-204A-SA4. Compliance required as indicated. As a result of two incidents of front Lord engine mount fatigue failures on units of old design the following must be accomplished: (a) Inspect mounts for cracks particularly in the web and fillet areas upon next arrival at scheduled stop where maintenance facilities are available and repeat this inspection at intervals not to exceed 50 flight hours. Any mounts with cracks must be replaced immediately with LM- 204A-SA5/Lockheed P/N 632182-9. (b) Replace all LM-204A-SA4 mounts with LM-204A-SA5 mounts within 300 flight hours after first inspection required by (a) but not later than March 1, 1960. (c) All spare quick engine change units must be modified to include the new SA5 mounts prior to installation in aircraft. (Lockheed Service Bulletin No. 228 covers this same subject.) This airworthiness directive sent by telegram to all operators of 188 aircraft on January 11, 1960. FOOTER:
Document Text
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AD Final Rules - DRS_60-04-03.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 60-04-03 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: LOCKHEED All Model L-188 Airplanes Subject: Engine Mounts Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: Lockheed Martin Corporation Model: 188A | 188C 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: 60-04-03 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 60-04-03 SUBJECT HEADING: LOCKHEED All Model L-188 Airplanes ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 60-04-03 LOCKHEED: Amdt. 100 Part 507 Federal Register February 9, 1960. Applies to All Model L-188 Airplanes Equipped With Lord Engine Mounts Number LM-204A-SA4. Compliance required as indicated. As a result of two incidents of front Lord engine mount fatigue failures on units of old design the following must be accomplished: (a) Inspect mounts for cracks particularly in the web and fillet areas upon next arrival at scheduled stop where maintenance facilities are available and repeat this inspection at intervals not to exceed 50 flight hours. Any mounts with cracks must be replaced immediately with LM- 204A-SA5/Lockheed P/N 632182-9. (b) Replace all LM-204A-SA4 mounts with LM-204A-SA5 mounts within 300 flight hours after first inspection required by (a) but not later than March 1, 1960. (c) All spare quick engine change units must be modified to include the new SA5 mounts prior to installation in aircraft. (Lockheed Service Bulletin No. 228 covers this same subject.) This airworthiness directive sent by telegram to all operators of 188 aircraft on January 11, 1960. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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