Commonwealth legislation

AD/SWSA226/52 - Elevator Gust Lock

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Commonwealth

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legislative instrument

Plain English Summary

2/10 complexity

This AD requires owners/operators and maintenance organisations of certain Fairchild SA‑226/SA‑227 aeroplanes to modify how the elevator gust lock is fitted or used by complying with one of two Fairchild Service Bulletins. It addresses reports of plunger freezing/corrosion that can cause uncommanded in‑flight gust‑lock engagement, reducing elevator control. Operators bear the cost and scheduling burden to complete the mandated SB work.

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AD/SWSA226/52 - Elevator Gust Lock

COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY

SCHEDULE OF AIRWORTHINESS DIRECTIVES

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Fairchild (Swearingen) SA226 and SA227 Series Aeroplanes

AD/SWSA226/52 Elevator Gust Lock 7/86 DM

Applicability: All models SA-226 and SA-227 referenced in the Requirement Documents. Requirement: Action in accordance with:

Fairchild Aircraft Corporation S.B. 226-27-041 Revised 18 February 1986, or

2. Fairchild Aircraft Corporation S.B. 227-27-016 Revised 18 February 1986.

Note: FAA AD 86-10-08 Amdt 39-5315 refers.

Compliance: Prior to 31 July 1986.

Background: There have been several reports overseas of in-flight engagements of the elevator gustlock. The gustlock plunger assembly is subject to freezing or corrosion due to exposure to the environment. This condition may cause the lock to stick in the intermediate engage position and result in uncommanded in-flight engagement. This Directive provides for an alternate method of gust locking the elevator.

Source text

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

1 AD/SWSA226/52 - Elevator Gust Lock