AD 64-08-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | DC-8-11 | Airworthiness Directives; DOUGLAS All Models DC-8 and DC-8F Series Aircraft |
| aircraft | The Boeing Company | DC-8-12 | Airworthiness Directives; DOUGLAS All Models DC-8 and DC-8F Series Aircraft |
| aircraft | The Boeing Company | DC-8-21 | Airworthiness Directives; DOUGLAS All Models DC-8 and DC-8F Series Aircraft |
| aircraft | The Boeing Company | DC-8-31 | Airworthiness Directives; DOUGLAS All Models DC-8 and DC-8F Series Aircraft |
| aircraft | The Boeing Company | DC-8-32 | Airworthiness Directives; DOUGLAS All Models DC-8 and DC-8F Series Aircraft |
| aircraft | The Boeing Company | DC-8-33 | Airworthiness Directives; DOUGLAS All Models DC-8 and DC-8F Series Aircraft |
| aircraft | The Boeing Company | DC-8-41 | Airworthiness Directives; DOUGLAS All Models DC-8 and DC-8F Series Aircraft |
| aircraft | The Boeing Company | DC-8-42 | Airworthiness Directives; DOUGLAS All Models DC-8 and DC-8F Series Aircraft |
| aircraft | The Boeing Company | DC-8-43 | Airworthiness Directives; DOUGLAS All Models DC-8 and DC-8F Series Aircraft |
| aircraft | The Boeing Company | DC-8-51 | Airworthiness Directives; DOUGLAS All Models DC-8 and DC-8F Series Aircraft |
Unsafe Condition
Excessive torquing of pilot and static line fittings of the pitch trim compensator and the use of a nonreinforced hose can result in the twisting or bending of the pitot and/or static lines and the possible loss of required instruments.
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Required Actions
Within 300 hours time in service after the effective date, inspect all aircraft for bending or twisting of pitot and static lines associated with the pitch trim compensator per Douglas Service Letter CL-78-1966/DEG8-34-15-0. Replace damaged lines before further flight. Each time fittings are removed, loosened, or retightened, inspect lines again. Additionally, within 1,500 hours' time in service, modify the pitch trim compensator system with reinforced lines per Douglas Service Bulletin No. 34-51 or FAA-approved equivalent.
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Compliance Time
within 300 hours time in service after the effective date of this AD
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Affected Aircraft
DOUGLAS All Models DC-8 and DC-8F Series Aircraft including DC-8-11, DC-8-12, DC-8-21, DC-8-31, DC-8-32, DC-8-33, DC-8-41, DC-8-42, DC-8-43, DC-8-51, etc.
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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