Commonwealth legislation

AD/PA-31/4 Amdt 1 - Elevator Torque Tube - Inspection

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Jurisdiction

Commonwealth

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legislative instrument

Plain English Summary

3/10 complexity

This AD applies to Piper PA‑31 series aeroplanes (unless modified per Section 11 of Piper SB No. 284) and mandates removal of the elevator torque tube, dismantling of the horn/brackets, stripping the finish and non‑destructive inspection (dye penetrant or magnetic particle) for cracking at intervals not exceeding 100 hours TIS. It affects owners/operators who bear costs, downtime and must have NDT capability; it’s intended to detect torque‑tube cracking and preserve safety.

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AD/PA-31/4 Amdt 1 - Elevator Torque Tube - Inspection

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COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY

SCHEDULE OF AIRWORTHINESS DIRECTIVES

View image in the official source Piper PA-31 Series Aeroplanes

AD/PA-31/4

Amdt 1

Elevator Torque Tube - Inspection 12/68

Applicability: All models not modified in accordance with Section 11 of Piper SB No. 284.

Requirement: Remove the elevator torque tube assembly from the aircraft and dismantle the horn assembly P/N 40006-00 and brackets P/N 40066-00 from the tube. Remove the finish from the tube and inspect for cracking using dye penetrant or magnetic particle methods.

Compliance: At intervals not exceeding 100 hours time in service.

Source text

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