AD 2025-02-07
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Boeing | Company | Airworthiness Directives; The Boeing Company Airplanes |
Unsafe Condition
Loss of GPS data and degraded GPS positional accuracy, which during a high-precision approach with this GPS error, could result in controlled flight into terrain. UTC calculation errors could result in simultaneous MMR resets on multiple airplanes, increased air traffic control workload, and consequent reduction in airplane separation and potential for mid-air collision.
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Required Actions
Revise the existing airplane flight manual (AFM) to include a limitation prohibiting operations requiring less than 0.3 required navigational performance (RNP) within a specified area for airplanes having a certain multimode receiver (MMR) with certain software installed. Install certain MMR operational software (OPS).
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Compliance Time
Within 12 months of the effective date of this AD.
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Affected Aircraft
The Boeing Company Model MD-11, MD-11F, and 717-200 airplanes; all Model 737-8 and 737-9 airplanes; all Model 737-600, -700, -700C, -800, -900, and -900ER series airplanes; certain Model 747-400 and 747-400F series airplanes; certain Model 757 and 767 airplanes; and all Model 777 airplanes, equipped with Collins GLU-2100 MMR, having P/N 822-2532-100, with a software version earlier than COL4C-0087-0003.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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