AD 2025-06-12
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Boeing | Company | Airworthiness Directives; The Boeing Company Airplanes |
Unsafe Condition
a glideslope (G/S) beam anomaly during an instrument landing system (ILS) approach, which resulted in a higher-than-expected descent rate during the final segment of an ILS approach, and misleading flight director guidance that the flightcrew might follow after disconnecting the autopilot, without reference to the other available information and flight deck indications.
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Required Actions
installing new autopilot flight director computer (AFDC) operational program software (OPS) and doing a software configuration check, as specified in Boeing Alert Requirements Bulletin 777-22A0046 RB, dated October 25, 2022.
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Compliance Time
within the compliance times specified in paragraph 3., "Compliance," of Boeing Alert Requirements Bulletin 777-22A0046 RB, dated October 25, 2022
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Affected Aircraft
The Boeing Company Model 777-200, -200LR, -300, -300ER, and 777F series airplanes, certificated in any category, as identified in Boeing Alert Requirements Bulletin 777-22A0046 RB, dated October 25, 2022.
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Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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