AD 74-08-06
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | DC-10-10 | Airworthiness Directives; DOUGLAS DC-10, Series 10, 30, and 40 Airplanes |
| aircraft | The Boeing Company | DC-10-10F | Airworthiness Directives; DOUGLAS DC-10, Series 10, 30, and 40 Airplanes |
| aircraft | The Boeing Company | DC-10-30 | Airworthiness Directives; DOUGLAS DC-10, Series 10, 30, and 40 Airplanes |
| aircraft | The Boeing Company | DC-10-30F (KC-10A, KDC-10) | Airworthiness Directives; DOUGLAS DC-10, Series 10, 30, and 40 Airplanes |
| aircraft | The Boeing Company | DC-10-40 | Airworthiness Directives; DOUGLAS DC-10, Series 10, 30, and 40 Airplanes |
Unsafe Condition
Failure to actuate the landing gear alternate freefall system caused by jamming of the landing gear control valve slide, Part No. AYG7043-1, in the sleeve, Part No. AYG 7039-1.
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Required Actions
Check the bypass control crank for freedom of movement daily and after each use of the alternate gear extension handle. If the crank is not freely movable, free it with downward force or replace the landing gear control valve (Part No. AYG7050) before flight. Install a stop on the valve per specified service bulletins within 1500 hours in service. Conduct a stop clearance inspection within 24 hours if the stop is already installed, and perform Phase II if clearance is ≤0.050 inch.
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Compliance Time
Within the next 1500 hours in service after the effective date of this AD, 24 hours after the effective date, and before further flight as required.
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Affected Aircraft
Douglas DC-10, Series 10, 30, and 40 airplanes with factory serial numbers as indicated in Douglas Alert Service Bulletin No. A32-82, dated May 13, 1974, or later FAA-approved revisions.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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