AD 61-19-03
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Lockheed Aircraft Corporation | 1049-54 | LOCKHEED Models 049, 149, 649, 749, and 1049 Series Aircraft |
| aircraft | Lockheed Aircraft Corporation | 1049B-55 (Navy R7V-1) | LOCKHEED Models 049, 149, 649, 749, and 1049 Series Aircraft |
| aircraft | Lockheed Aircraft Corporation | 1049C-55 | LOCKHEED Models 049, 149, 649, 749, and 1049 Series Aircraft |
| aircraft | Lockheed Aircraft Corporation | 1049D-55 | LOCKHEED Models 049, 149, 649, 749, and 1049 Series Aircraft |
| aircraft | Lockheed Aircraft Corporation | 1049E-55 | LOCKHEED Models 049, 149, 649, 749, and 1049 Series Aircraft |
| aircraft | Lockheed Aircraft Corporation | 1049F-55 (USAF C-121C) | LOCKHEED Models 049, 149, 649, 749, and 1049 Series Aircraft |
| aircraft | Lockheed Aircraft Corporation | 1049G-82 | LOCKHEED Models 049, 149, 649, 749, and 1049 Series Aircraft |
| aircraft | Lockheed Aircraft Corporation | 1049H-82 | LOCKHEED Models 049, 149, 649, 749, and 1049 Series Aircraft |
| aircraft | Lockheed Aircraft Corporation | 149-46 | LOCKHEED Models 049, 149, 649, 749, and 1049 Series Aircraft |
| aircraft | Lockheed Aircraft Corporation | 49-46 | LOCKHEED Models 049, 149, 649, 749, and 1049 Series Aircraft |
| aircraft | Lockheed Aircraft Corporation | 649-79 | LOCKHEED Models 049, 149, 649, 749, and 1049 Series Aircraft |
| aircraft | Lockheed Aircraft Corporation | 649A-79 | LOCKHEED Models 049, 149, 649, 749, and 1049 Series Aircraft |
| aircraft | Lockheed Aircraft Corporation | 749-79 | LOCKHEED Models 049, 149, 649, 749, and 1049 Series Aircraft |
| aircraft | Lockheed Aircraft Corporation | 749A-79 | LOCKHEED Models 049, 149, 649, 749, and 1049 Series Aircraft |
Unsafe Condition
Failure of the 5 bolts, nuts, and cotter pins in the parallelogram linkage between the elevator boost valve and boost mechanism could result in loss of elevator control.
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Required Actions
Inspect to ensure the 5 bolts, nuts, and cotter pins in the parallelogram linkage between the elevator boost valve and boost mechanism are properly secured and safetied. The inspection must be completed at the first layover or stop with qualified personnel and facilities, but not later than the next 25 hours' time in service after the effective date of this AD.
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Compliance Time
Not later than the next 25 hours' time in service after the effective date of this AD.
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Affected Aircraft
Lockheed Aircraft Corporation Models 049, 149, 649, 749, and 1049 Series Aircraft
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Federal Register Abstract
Elevator Bolt Inspection
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_61-19-03.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 61-19-03 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: LOCKHEED Models 049, 149, 649, 749, and 1049 Series Aircraft Subject: Elevator Bolt Inspection Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 09/08/1961 Make: Lockheed Aircraft Corporation Model: 1049-54 | 1049B-55 (Navy R7V-1) | 1049C-55 | 1049D-55 | 1049E-55 | 1049F-55 (USAF C-121C) | 1049G-82...Show more 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: 61-19-03 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 61-19-03 SUBJECT HEADING: LOCKHEED Models 049, 149, 649, 749, and 1049 Series Aircraft ACTION: SUMMARY: DATES: Effective September 20, 1961, for all persons except those to whom it was made effective immediately by telegram dated September 8, 1961. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 61-19-03 LOCKHEED: Amdt. 338 Part 507 Federal Register September 20, 1961. Applies to All 049, 149, 649, 749, and 1049 Series Aircraft. Compliance required as indicated. As a result of findings during investigation of a recent Lockheed Model 049 aircraft fatal accident, it is necessary to require the following corrective action. Unless already accomplished within the last 50 hours' time in service, the following special inspection is required at the first layover or stop where qualified maintenance personnel and facilities are available and the inspection can be conducted without undue delay but not to exceed the next 25 hours' time in service after the effective date of this AD. Inspect to ensure that the 5 bolts, nuts, and cotter pins in the parallelogram linkage between the elevator boost valve and boost mechanism are properly secured and safetied. This directive effective September 20, 1961, for all persons except those to whom it was made effective immediately by telegram dated September 8, 1961. FOOTER:
Document Text
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AD Final Rules - DRS_61-19-03.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 61-19-03 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: LOCKHEED Models 049, 149, 649, 749, and 1049 Series Aircraft Subject: Elevator Bolt Inspection Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 09/08/1961 Make: Lockheed Aircraft Corporation Model: 1049-54 | 1049B-55 (Navy R7V-1) | 1049C-55 | 1049D-55 | 1049E-55 | 1049F-55 (USAF C-121C) | 1049G-82...Show more 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: 61-19-03 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 61-19-03 SUBJECT HEADING: LOCKHEED Models 049, 149, 649, 749, and 1049 Series Aircraft ACTION: SUMMARY: DATES: Effective September 20, 1961, for all persons except those to whom it was made effective immediately by telegram dated September 8, 1961. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 61-19-03 LOCKHEED: Amdt. 338 Part 507 Federal Register September 20, 1961. Applies to All 049, 149, 649, 749, and 1049 Series Aircraft. Compliance required as indicated. As a result of findings during investigation of a recent Lockheed Model 049 aircraft fatal accident, it is necessary to require the following corrective action. Unless already accomplished within the last 50 hours' time in service, the following special inspection is required at the first layover or stop where qualified maintenance personnel and facilities are available and the inspection can be conducted without undue delay but not to exceed the next 25 hours' time in service after the effective date of this AD. Inspect to ensure that the 5 bolts, nuts, and cotter pins in the parallelogram linkage between the elevator boost valve and boost mechanism are properly secured and safetied. This directive effective September 20, 1961, for all persons except those to whom it was made effective immediately by telegram dated September 8, 1961. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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