Commonwealth legislation

AD/HILLER 12/9 Amdt 1 - Horizontal Stabiliser Spar - Inspection

In ForceCTH

Jurisdiction

Commonwealth

Collection

legislative instrument

Plain English Summary

3/10 complexity

This AD mandates removal and inspection of the horizontal stabiliser on Hiller UH‑12/A/B/C helicopters to check the stabiliser spar tube around attachment bolt holes for cracking, using a lens of at least 8× magnification, and repeating the inspection every 300 hours TIS. Owners/operators must carry out and fund the work; the AD sets the inspection requirement and interval but leaves inspection technique, who performs/signs off, corrective actions, and recordkeeping to operator procedures.

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AD/HILLER 12/9 Amdt 1 - Horizontal Stabiliser Spar - 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 Hiller UH-12 Series Helicopters

AD/HILLER 12/9

Amdt 1

Horizontal Stabiliser Spar - Inspection 3/78

Applicability: All models UH-12, UH-12A, UH-12B and UH-12C.

Requirement: Remove the horizontal stabiliser, and with the aid of a lens of not less than 8X power, inspect the spar tube for cracking in the vicinity of the stabiliser attachment bolt holes.

Compliance: At intervals not exceeding 300 hours’ time in service.

Source text

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