Commonwealth legislation

AD/BELL 212/49 - Tail Rotor Driveshaft Hangar Bearings

In ForceCTH

Jurisdiction

Commonwealth

Collection

legislative instrument

Plain English Summary

3/10 complexity

Mandates a daily pre‑flight inspection of tail‑rotor driveshaft hangar bearings on Bell 212 helicopters fitted with specified part and serial‑number bearings, carried out per Bell Alert Service Bulletin 212‑91‑69 Rev A. Compliance was required for the first flight after 27 November 1991. The rule affects Bell 212 operators who must absorb inspection time, recordkeeping and any replacement costs. The action was prompted by a fatal accident indicating a possible production‑batch defect.

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AD/BELL 212/49 - Tail Rotor Driveshaft Hangar Bearings

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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 212 Series Helicopters

AD/BELL 212/49 Tail Rotor Driveshaft Hangar Bearings 1/92

Applicability: All models fitted with tail rotor driveshaft bearings.

P/N 204-040-623-003 with a S/N prefix of either “T” or “N” prior to N4000 and all - 005 bearings with a S/N prefix of either “T” or “N”.

Requirement: Action in accordance with Bell Alert Service Bulletin 212-91-69 Revision A.

Note: FAA Priority Letter AD 91-24-16 refers.

Compliance: Daily before first flight of the day after 27 November 1991.

Background: A daily inspection of the tail rotor driveshaft bearings has been found necessary following a fatal accident which revealed the possibility of a production batch problem with these bearings.

Source text

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