Commonwealth legislation

AD/AC/49 - Wing Main Spar - Inspection

RepealedCTH

This Act has been repealed and is no longer in force. It is retained for historical reference.

Jurisdiction

Commonwealth

Collection

legislative instrument

Plain English Summary

2/10 complexity

What this is: A mandatory safety instruction (called an Airworthiness Directive) requiring a specific structural inspection on certain aircraft.

Who it affects: Owners and operators of Twin Commander Model 690 aircraft with serial numbers 11001 through 11021 (specific Gulfstream/Rockwell/Aero Commander planes).

What it requires: An inspection of the wing main spar (the primary structural beam supporting the wing) must be carried out within 100 hours of flight time after 31 May 1973.

Why it matters: The wing main spar is critical to keeping the wing attached to the aircraft. This directive addresses a discovered defect or fatigue issue that could lead to structural failure if not checked.

Technical details: The actual inspection procedure is contained in Aero Commander Service Letter No. 253, which operators must follow to comply.

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AD/AC/49 - Wing Main 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 Twin Commander (Gulfstream/Rockwell/ Aerocommander 500, 600 and 700) Series Aeroplanes

AD/AC/49 Wing Main Spar - Inspection 5/73

Applicability: Model 690 with S/Nos. 11001 to 11021. Compliance: Within 100 hours’ time in service after 31 May 1973. Document: Aero Commander SL No. 253.

Source text

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