AD 2012-21-08
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Boeing | Company | Airworthiness Directives; The Boeing Company Airplanes |
Unsafe Condition
Erroneous output from a single radio altimeter channel, which resulted in premature autothrottle retard during approach, could lead to premature autothrottle landing flare retard and the loss of automatic speed control, and consequent loss of control of the airplane.
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Required Actions
Inspect the part numbers of the operational program software (OPS) of the flight control computers (FCCs). Perform corrective actions if necessary, including installing FCC software part number 2274-COL-AC1-07 or later versions approved by the Boeing Commercial Airplanes Organization Designation Authorization (ODA) after May 18, 2012.
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Compliance Time
Within 3 months after the effective date of this AD (November 27, 2012).
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Affected Aircraft
The Boeing Company Model 737-600, -700, -700C, -800, and -900 series airplanes.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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