AD 74-05-04
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | DC-10-10 | Airworthiness Directives; MCDONNELL DOUGLAS DC-10-10 Series Airplanes |
| aircraft | The Boeing Company | DC-10-10F | Airworthiness Directives; MCDONNELL DOUGLAS DC-10-10 Series Airplanes |
Unsafe Condition
The inoperative placard on the yaw damper test function may mask a failure of the yaw computer Part No. 1954094-6, leading to potential loss of yaw damper functionality and degraded aircraft stability.
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Required Actions
Inspect DC-10-10 airplanes to determine if yaw computer Part No. 1954094-6 is installed. Remove the inoperative placard from the yaw damper test function on the overhead test panel. Install specified placards on the 'YAW DAMP TEST FAIL' lights and the overhead yaw damper panel. Revise the Airplane Flight Manual to include limitations and test procedures for the yaw damper system.
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Compliance Time
within 300 hours additional time in service after the effective date of this airworthiness directive, unless previously accomplished
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Affected Aircraft
Douglas Aircraft Company DC-10-10 series airplanes
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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