Commonwealth legislation

AD/AC-112/9 - Wing Structure - Rib - 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This Act has been repealed and is no longer in force. It is retained for historical reference.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

This Airworthiness Directive is a legally-binding safety instruction issued by the Civil Aviation Safety Authority (CASA).

What it does: Mandates repetitive inspections of the wing structure ribs (the internal supports inside the wings) on specific Gulfstream (Rockwell) 112 series aircraft.

Who it affects: Owners and operators of Gulfstream/Rockwell Model 112 aircraft with serial numbers 3 through 470 (typically small private or training aircraft under 5,700 kg).

What must be done:

Initial inspection: Within 100 hours of flying time after 30 September 1978
Ongoing inspections: Every 100 hours of flying time thereafter
When it stops: Once the aircraft is modified according to Part II of manufacturer's Service Bulletin SB-112-59

Why it matters: Fatigue cracks had been discovered in wing ribs of these aircraft. Without inspection, structural failure could occur, potentially causing loss of the aircraft and life. This rule ensures potential cracks are found before they become dangerous.

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Current sections

Direct links to the current provisions in AD/AC-112/9 - Wing Structure - Rib - Inspection.

AD/AC-112/9 - Wing Structure - Rib - 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 Gulfstream (Rockwell) 112 Series Aeroplanes

AD/AC-112/9 Wing Structure - Rib - Inspection 8/78

Applicability: All model 112 with S/Nos. 3 to 470. Document: Rockwell International SB No. SB-112-59.

Compliance: Initially inspect within 100 hours’ time in service after 30 September 1978 and thereafter at intervals not exceeding 100 hours’ time in service until modified in accordance with Part II of SB-112-59.

Source text

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