AD 96-07-09
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | 747-400 Series | Airworthiness Directives; Boeing Model 747-400, 757, and 767 Series Airplanes |
| aircraft | The Boeing Company | 747-400D Series | Airworthiness Directives; Boeing Model 747-400, 757, and 767 Series Airplanes |
| aircraft | The Boeing Company | 747-400F Series | Airworthiness Directives; Boeing Model 747-400, 757, and 767 Series Airplanes |
| aircraft | The Boeing Company | 757-200 Series | Airworthiness Directives; Boeing Model 747-400, 757, and 767 Series Airplanes |
| aircraft | The Boeing Company | 757-200CB Series | Airworthiness Directives; Boeing Model 747-400, 757, and 767 Series Airplanes |
| aircraft | The Boeing Company | 757-200PF Series | Airworthiness Directives; Boeing Model 747-400, 757, and 767 Series Airplanes |
| aircraft | The Boeing Company | 757-300 Series | Airworthiness Directives; Boeing Model 747-400, 757, and 767 Series Airplanes |
| aircraft | The Boeing Company | 767-200 Series | Airworthiness Directives; Boeing Model 747-400, 757, and 767 Series Airplanes |
| aircraft | The Boeing Company | 767-300 Series | Airworthiness Directives; Boeing Model 747-400, 757, and 767 Series Airplanes |
| aircraft | The Boeing Company | 767-300F Series | Airworthiness Directives; Boeing Model 747-400, 757, and 767 Series Airplanes |
Unsafe Condition
The current EICAS computers do not provide an appropriate indication to the flight crew of an impending engine fuel filter bypass condition, which could result in the flight crew being unaware of a severely contaminated airplane fuel system and the associated increased potential for engine power loss.
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Required Actions
Revise the Airplane Flight Manual to advise flight crews to monitor EICAS for 'status' level messages about impending engine fuel filter bypass, and install upgraded EICAS computers that provide 'advisory' level messages for such bypass conditions.
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Compliance Time
before further flight
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Affected Aircraft
Boeing Model 747-400, 757, and 767 series airplanes
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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