AD 2000-08-22
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | MD | Various | Airworthiness Directives; MD Helicopters Inc. Model 369D, 369E, 500N, and 600N Helicopters |
Unsafe Condition
Erroneous turbine outlet temperature (TOT) readings and incorrect wiring harness terminal lugs on the thermocouple wiring, which could lead to an erroneous TOT indication, damage to critical engine components, loss of engine power, and a subsequent forced landing.
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Required Actions
Inspect and verify the calibration of the TOT indicating system, inspect TOT wire harness terminal lugs, connector pins, and sockets for correct material and installation, retest the TOT indicating system, and replace any unairworthy parts with airworthy parts. Repetitive testing of the TOT indicating system is required at intervals not to exceed 300 hours time-in-service.
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Compliance Time
Within the next 50 hours time-in-service or on or before June 15, 2000, whichever occurs earlier.
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Affected Aircraft
MD Helicopters Inc. Model 369D, 369E, 500N, and 600N helicopters with analog/digital TOT indicators installed, part number 369D24513-1 or 9A3420.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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