Commonwealth legislation

AD/BELL 412/27 - Tailboom Upper Longeron

In ForceCTH

Jurisdiction

Commonwealth

Collection

legislative instrument

Plain English Summary

3/10 complexity

Requires operators of specified Bell 412 helicopters (listed serial numbers) to carry out the actions in Bell Alert Service Bulletin No. 412‑90‑49: an initial access/inspection and a follow‑up structural modification. The initial action must be done by 30 November 1990, then inspections recur every 300 flight hours. The directive responds to reports of cracked upper longeron splices. Aircraft owners/operators pay for and arrange the work; the Civil Aviation Safety Authority requires and enforces compliance.

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AD/BELL 412/27 - Tailboom Upper Longeron

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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 412 Series Helicopters

AD/BELL 412/27 Tailboom Upper Longeron 12/90

Applicability: Model 412 with serial numbers:

33001 through 33211

34001 through 34013

36001 through 36013

Requirement: 1. Action in accordance with Part 1 of Bell Alert Service Bulletin No 412-90-49.

Action in accordance with Part II of Bell Alert Service Bulletin No 412-90-49. Compliance: 1. Prior to 30 November 1990.
At intervals not exceeding 300 hours time in service after incorporation of Requirement 1.

Background: Incidents of cracked longeron splices have created a requirement for additional access to inspect upper longeron splices, and modification action to increase structural integrity.

Source text

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