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Airworthiness Directive

AD 97-25-09: Allison Engine Company Model 250-C40B Turboshaft Engines

Airworthiness Directives; Allison Engine Company Model 250-C40B Turboshaft Engines

Effective
Dec 23, 1997
Published
Dec 8, 1997
Registered aircraft
1

Models this AD may apply to

AI-extracted — verify against original

Matched from the AD's applicability section. Applicability must be confirmed by a mechanic against the aircraft's records.

Engines

  • ALLISON 250-C40B
  • Serial numbers per Allison Alert Commercial Engine Bulletin (CEB) No. A-72-5009, dated May 21, 1997. Only with: Engines, gearboxes, and gears identified by serial number in Allison Alert CEB No. A-72-5009.
  • Only with: Engines, gearboxes, and gears identified by serial number in Allison Alert CEB No. A-72-5009.

Applicability

From the AD text
Allison Engine Company Model 250-C40B turboshaft engines, with engines, gearboxes, and gears identified by serial number (S/N) in Allison Alert Commercial Engine Bulletin (CEB) No. A-72-5009, dated May 21, 1997. The 250-C40B engine is installed on and limited to the twin-engine Bell Helicopter Textron 430 series helicopters.

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