AD 2001-21-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Honeywell | International Inc | Airworthiness Directives; Honeywell International Inc. (formerly AlliedSignal Inc. and Garrett Turbine Engine Company) TPE331-8, -10N, and -12B Turboprop Engines |
| engine | Garrett | Turbine | Airworthiness Directives; Honeywell International Inc. (formerly AlliedSignal Inc. and Garrett Turbine Engine Company) TPE331-8, -10N, and -12B Turboprop Engines |
Unsafe Condition
Uncommanded torque increase to 150% within 5 seconds of initial torque acceleration, leading to asymmetric thrust and potential loss of control.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Revise the Emergency and Normal Procedures section of the applicable Airplane Flight Manual (AFM) within 30 days after the effective date of the AD. The revisions must include procedures to minimize asymmetric thrust resulting from uncommanded power increases.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 30 days after the effective date of the AD.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Honeywell International Inc. TPE331-8, -10N, and -12B turboprop engines with electronic engine controls (EEC) part numbers 2101322-1, -4, -11, -12, -13, -14, -15, or -16 installed, specifically affecting Cessna Aircraft Company Model 441 Conquest airplanes with serial numbers 441-0001 and higher.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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