Commonwealth legislation

AD/BELL 47/89 - Flight Control Systems - Hydraulic Servo to Swashplate Control Plate Attachment Bolts

In ForceCTH

Jurisdiction

Commonwealth

Collection

legislative instrument

Plain English Summary

2/10 complexity

Operators and owners of Bell Helicopter Textron 47G/J/K aircraft must comply with Bell Alert Service Bulletin 47-83-8 by 31 December 1983 to inspect and correct a reported flight‑control bolt mismatch (AN bolts installed where BHTI standard bolts are required). The directive affects operators, maintenance organisations and the regulator, shifts inspection/repair costs and downtime to owners, and enforces a manufacturer‑specified technical fix to mitigate bolt‑failure risk.

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AD/BELL 47/89 - Flight Control Systems - Hydraulic Servo to Swashplate Control Plate Attachment Bolts

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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 Bell Helicopter Textron 47 (All Variants) Series Helicopters

AD/BELL 47/89 Flight Control Systems - Hydraulic Servo to

Swashplate Control Plate Attachment Bolts

Applicability: All 47G, J and K series aircraft. Document: Bell Alert Service Bulletin 47-83-8. Compliance: By 31 December 1983.

10/83

Background: There have been two reported failures on AN Standard bolts, installed in the above flight control application where BHTI standard bolts should have been used.

Source text

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