AD 78-20-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | DC-10-10 | Airworthiness Directives; MCDONNELL DOUGLAS DC-10-10, -10F, -30, -30F, and -40 Airplanes |
| aircraft | The Boeing Company | DC-10-10F | Airworthiness Directives; MCDONNELL DOUGLAS DC-10-10, -10F, -30, -30F, and -40 Airplanes |
| aircraft | The Boeing Company | DC-10-30 | Airworthiness Directives; MCDONNELL DOUGLAS DC-10-10, -10F, -30, -30F, and -40 Airplanes |
| aircraft | The Boeing Company | DC-10-30F (KC-10A, KDC-10) | Airworthiness Directives; MCDONNELL DOUGLAS DC-10-10, -10F, -30, -30F, and -40 Airplanes |
| aircraft | The Boeing Company | DC-10-40 | Airworthiness Directives; MCDONNELL DOUGLAS DC-10-10, -10F, -30, -30F, and -40 Airplanes |
Unsafe Condition
Damage to the horizontal stabilizer attachment structure due to stabilizer drive chain failures.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect horizontal stabilizer drive chains for integrity and engagement every 90 hours' time in service. Inspect side links for fractures or damage every 1200 hours' time in service, replacing chains if damage is found. Replace specific chain part numbers with SK14869-120 or SK14869-220 within 4,000 hours' time in service.
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Compliance Time
Within 90 hours' time in service after the effective date of this AD and thereafter at intervals not to exceed 90 hours' time in service; within the next 400 hours' time in service after the effective date and thereafter at intervals not to exceed 1200 hours' time in service; within the next 4,000 hours' time in service after the effective date.
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Affected Aircraft
MCDONNELL DOUGLAS DC-10-10, -10F, -30, -30F, and -40 airplanes with Part No. SK12280-120, SK12280A120, SK12280-220, or SK12280A220 horizontal stabilizer drive chain with 6,000 or more hours' time in service on the chain.
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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