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 |
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.
AI-generated summary from the source AD text. Verify against the official source before acting.
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.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Not later than the next 25 hours' time in service after the effective date of this AD.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Lockheed Aircraft Corporation Models 049, 149, 649, 749, and 1049 Series Aircraft
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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