AD 57-16-03
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | DC-7 | Airworthiness Directives; DOUGLAS All Model DC-7 Series Aircraft |
| aircraft | The Boeing Company | DC-7B | Airworthiness Directives; DOUGLAS All Model DC-7 Series Aircraft |
| aircraft | The Boeing Company | DC-7C | Airworthiness Directives; DOUGLAS All Model DC-7 Series Aircraft |
Unsafe Condition
Fatigue failures have occurred in the elevator control tab pushrod assembly (P/N 4499117) due to tubes reamed beyond specified limits to accommodate end fittings. Other assemblies (P/Ns 2357984, 3593467, 4335618) may also have excessive reaming, leading to potential cracks.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect all specified assemblies within the next 300 flight hours for fatigue cracks or excessive reaming. Use x-ray if disassembled inspection is insufficient. Replace parts if cracks are found or reaming exceeds Douglas Service Bulletin DC-7 No. 181 limits. Visually reinspect parts within tolerance every 300 flight hours until replaced with P/N 359347.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
within the next 300 hours
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Douglas DC-7, DC-7B, DC-7C aircraft prior to Fuselage No. 697
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
This site is not affiliated with or endorsed by the FAA. Always verify with official sources.