AD 95-12-27
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | 747-400 Series | Airworthiness Directives; Boeing Model 747-400 Series Airplanes |
| aircraft | The Boeing Company | 747-400D Series | Airworthiness Directives; Boeing Model 747-400 Series Airplanes |
| aircraft | The Boeing Company | 747-400F Series | Airworthiness Directives; Boeing Model 747-400 Series Airplanes |
Unsafe Condition
A wiring error in the flap control unit (FCU) input wiring could lead to loss of control of all flap operations, resulting in an all-flaps-up landing.
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Required Actions
Revise the input wiring for the flap control unit (FCU) in accordance with Boeing Service Bulletin 747-27A2346, Revision 1 or 2. Perform an additional systems test for the trailing edge flap wiring within 120 days after the effective date of this AD.
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Compliance Time
Within 30 days after August 10, 1994 (for line numbers 696-1019, 1021-1026) or within 30 days after the effective date of this AD (for line numbers 1020, 1027-1036). The systems test must be done within 120 days after the effective date of this AD for all applicable line numbers.
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Affected Aircraft
Boeing Model 747-400 series airplanes with line numbers 696 through 1036 inclusive, including 747-400D and 747-400F series.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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