AD 56-16-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Lockheed Aircraft Corporation | 1049-54 | LOCKHEED All Models 49, 149, 649, 749, and 1049 Series |
| aircraft | Lockheed Aircraft Corporation | 1049B-55 (Navy R7V-1) | LOCKHEED All Models 49, 149, 649, 749, and 1049 Series |
| aircraft | Lockheed Aircraft Corporation | 1049C-55 | LOCKHEED All Models 49, 149, 649, 749, and 1049 Series |
| aircraft | Lockheed Aircraft Corporation | 1049D-55 | LOCKHEED All Models 49, 149, 649, 749, and 1049 Series |
| aircraft | Lockheed Aircraft Corporation | 1049E-55 | LOCKHEED All Models 49, 149, 649, 749, and 1049 Series |
| aircraft | Lockheed Aircraft Corporation | 1049F-55 (USAF C-121C) | LOCKHEED All Models 49, 149, 649, 749, and 1049 Series |
| aircraft | Lockheed Aircraft Corporation | 1049G-82 | LOCKHEED All Models 49, 149, 649, 749, and 1049 Series |
| aircraft | Lockheed Aircraft Corporation | 1049H-82 | LOCKHEED All Models 49, 149, 649, 749, and 1049 Series |
| aircraft | Lockheed Aircraft Corporation | 149-46 | LOCKHEED All Models 49, 149, 649, 749, and 1049 Series |
| aircraft | Lockheed Aircraft Corporation | 49-46 | LOCKHEED All Models 49, 149, 649, 749, and 1049 Series |
Unsafe Condition
Fatigue failures in the side webs of the Bendix Eclipse-Pioneer Type DQ-15 Series servo disconnect mounting brackets in the primary flight control system could disable the flight control system.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect rudder and elevator servo disconnect mounting brackets by dye penetrant or equivalent method every 125 hours until item 2 is done. Discard defective brackets. Install secondary servo support brackets as soon as possible but not exceeding next overhaul period after parts are available.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
At 125-hour intervals until item 2 is accomplished. Item 2 must be done as soon as possible but not to exceed next overhaul period after parts become available.
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Affected Aircraft
Lockheed Aircraft Corporation models 49, 149, 649, 749, and 1049 Series equipped with Bendix Eclipse-Pioneer Type PB-10 Series automatic pilot installations.
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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