AD 97-02-19
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | 757-200 Series | Airworthiness Directives; Boeing Model 757 and 767 Series Airplanes |
| aircraft | The Boeing Company | 757-200CB Series | Airworthiness Directives; Boeing Model 757 and 767 Series Airplanes |
| aircraft | The Boeing Company | 757-200PF Series | Airworthiness Directives; Boeing Model 757 and 767 Series Airplanes |
| aircraft | The Boeing Company | 757-300 Series | Airworthiness Directives; Boeing Model 757 and 767 Series Airplanes |
| aircraft | The Boeing Company | 767-200 Series | Airworthiness Directives; Boeing Model 757 and 767 Series Airplanes |
| aircraft | The Boeing Company | 767-300 Series | Airworthiness Directives; Boeing Model 757 and 767 Series Airplanes |
| aircraft | The Boeing Company | 767-300F Series | Airworthiness Directives; Boeing Model 757 and 767 Series Airplanes |
Unsafe Condition
Uncommanded advancement of the throttle levers due to a high impedance connection to the excitation phase of the servo motor associated with the thrust management computer (TMC).
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Required Actions
Replace the thrust management computer (TMC) with a new TMC. The replacement must be performed in accordance with the manufacturer's service bulletins, which include instructions for locating and replacing the TMC.
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Compliance Time
Within 18 months from the effective date of this AD (March 4, 1997).
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Affected Aircraft
Boeing Model 757 series airplanes (line positions 001 through 716) and Model 767 series airplanes (line positions 001 through 556, 558 through 587, and 589 through 615).
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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