Commonwealth legislation

AD/BEA 121/28 - Wing to Fuselage Main Spar Attachment Fitting

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legislative instrument

Plain English Summary

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This airworthiness directive requires owners/operators of Beagle B121 Pup Series 2 and 3 aircraft to carry out high‑frequency eddy‑current inspections of the wing‑to‑fuselage main spar attachment fitting, following Jetstream Alert Service Bulletin B121/100 and using role‑factor adjustments in Jetstream SB B121/76. The manufacturer’s fatigue calculations prompted the directive; operators pay for the inspections, must follow the specified thresholds and intervals, and schedule inspections to remain compliant with the directive.

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AD/BEA 121/28 - Wing to Fuselage Main Spar Attachment Fitting

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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 Beagle B121 (Pup) Series Aeroplanes

AD/BEA 121/28 Wing to Fuselage Main Spar Attachment Fitting 9/95

Applicability: All Beagle B121 Pup Series 2 and Series 3 aircraft.

Requirement: Perform a high frequency eddy current inspection of the wing to fuselage main spar attachment fitting in accordance with Jetstream Alert Service Bulletin (ASB) B121/100.

Note: CAA(UK) AD 007-01-95 refers.

Compliance: Inspect at the thresholds and intervals specified in Jetstream ASB B121/100 as adjusted by the role factors assigned by Jetstream SB B121/76.

Background: Fatigue calculations by the manufacturer have indicated that additional inspections are required on the wing to fuselage main spar attachment fitting.

Source text

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