AD 2020-03-20
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Boeing | Company | Airworthiness Directives; The Boeing Company Airplanes |
Unsafe Condition
The loss of GPS data or degraded GPS positional accuracy while using a certain MMR with certain software installed, which could result in controlled flight into terrain.
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Required Actions
Revising the existing airplane flight manual to include a limitation to prohibit operations that require less than 0.3 RNP within a specified area for airplanes having a certain MMR with certain software installed.
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Compliance Time
Before further flight
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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.
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Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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