Commonwealth legislation

AD/TFE 731/6 - High Pressure Rotor and Nozzle Assembly Bolt - Replacement

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Commonwealth

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legislative instrument

Plain English Summary

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This AD requires owners/operators of specified AlliedSignal (Garrett/AiResearch) TFE731-2 engines to replace the high‑pressure rotor/nozzle assembly bolts at the next "hot end" inspection after 30 Sept 1980—or sooner if that area is exposed—per AiResearch Service Bulletin No. 72‑3138. Operators bear parts, labour and downtime costs; the goal is to prevent bolt‑fragment damage to the curvic coupling and HP turbine rotor.

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AD/TFE 731/6 - High Pressure Rotor and Nozzle Assembly Bolt - Replacement

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COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 106 CIVIL AVIATION SAFETY AUTHORITY

SCHEDULE OF AIRWORTHINESS DIRECTIVES

View image in the official source AlliedSignal (Garrett/AiResearch) Turbine Engines - TFE731 Series

AD/TFE731/6 High Pressure Rotor and Nozzle Assembly Bolt - Replacement

Applicability: TFE731-2-1C; TFE731-2-2B; TFE731-2-2J; TFE731-2-2L.

Document: AiResearch SB No. 72-3138, or AD/AIR-T/38.

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Compliance: During the next hot end inspection completed after 30 September 1980 or during the next unscheduled exposure of the area, whichever occurs first.

Background: This Directive is issued to reduce the possibility of damaging the curvic coupling and the forward side of the H.P. turbine rotor by pieces of failed bolts.

Source text

Sourced from the Federal Register of Legislation (legislation.gov.au), CC BY 4.0.