AD 78-01-15
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | DC-8-11 | Airworthiness Directives; MCDONNELL DOUGLAS DC-8 Series Airplanes |
| aircraft | The Boeing Company | DC-8-12 | Airworthiness Directives; MCDONNELL DOUGLAS DC-8 Series Airplanes |
| aircraft | The Boeing Company | DC-8-21 | Airworthiness Directives; MCDONNELL DOUGLAS DC-8 Series Airplanes |
| aircraft | The Boeing Company | DC-8-31 | Airworthiness Directives; MCDONNELL DOUGLAS DC-8 Series Airplanes |
| aircraft | The Boeing Company | DC-8-32 | Airworthiness Directives; MCDONNELL DOUGLAS DC-8 Series Airplanes |
| aircraft | The Boeing Company | DC-8-33 | Airworthiness Directives; MCDONNELL DOUGLAS DC-8 Series Airplanes |
| aircraft | The Boeing Company | DC-8-41 | Airworthiness Directives; MCDONNELL DOUGLAS DC-8 Series Airplanes |
| aircraft | The Boeing Company | DC-8-42 | Airworthiness Directives; MCDONNELL DOUGLAS DC-8 Series Airplanes |
| aircraft | The Boeing Company | DC-8-43 | Airworthiness Directives; MCDONNELL DOUGLAS DC-8 Series Airplanes |
| aircraft | The Boeing Company | DC-8-51 | Airworthiness Directives; MCDONNELL DOUGLAS DC-8 Series Airplanes |
Unsafe Condition
Failure of the elevator geared tab crank arms and jamming of the elevator surface.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Within 12 months after the effective date, modify the elevator leading edge cutouts and covers, modify and reidentify the elevator geared tab links, modify rod ends as required, and chamfer the horizontal stabilizer box fittings. Within 18 months after the effective date, install an elevator position indicator system. Within 30 days after the effective date, install a placard or update the Operations Manual and check list as specified.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within the next 12 months after the effective date of this AD, unless already accomplished
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Affected Aircraft
MCDONNELL DOUGLAS Model DC-8 Series airplanes certificated in all categories.
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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