Commonwealth legislation

AD/F50/61 - Aileron Trim Screwjack Capscrews

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Commonwealth

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legislative instrument

Plain English Summary

3/10 complexity

Requires operators of Fokker F50 (F27 Mk 050) aeroplanes fitted with Morse Controls aileron trim screwjacks (P/N 189255, S/N 53/88–112/90) to carry out the corrective actions specified in RLD AD 93-066 (A). It responds to detected capscrew failures caused by incorrect treatment; failure could allow uncontrolled trim/balance-tab movement (flutter). This matters to aircraft owners and maintenance organisations because it mandates inspection/rectification to prevent a flight‑safety hazard.

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AD/F50/61 - Aileron Trim Screwjack Capscrews

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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 Fokker F50 (F27 Mk 50) Series Aeroplanes

AD/F50/61 Aileron Trim Screwjack Capscrews 8/93

Applicability: Model F27 Mk 050, all serial numbers, if equipped with Morse Controls Ltd. Aileron Trim Screwjacks, P/N 189255, serial numbers 53/88 through 112/90.

Requirement: Action in accordance with the technical requirements of RLD AD 93-066 (A).

Note: Fokker SB F50-27-038 and Morse Controls Ltd SB 27-10-189255-A Issue 1 refer.

Compliance: As specified in the Requirement Document.

Background: A number of failed capscrews have been detected during a shop inspection. Subsequent investigation showed that these failures were due to an incorrect treatment. Failure of all capscrews could result in uncontrolled movement of the trim/balance tab, i.e. flutter.

Source text

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