Commonwealth legislation

AD/SWSA226/62 - Propeller Blade Separation

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Commonwealth

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legislative instrument

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This Airworthiness Directive requires operators of Swearingen SA226‑TC/AT aeroplanes fitted with Hartzell HC‑B3TN‑5C (T10282) propellers and certain STC‑modified Garrett TPE331 engines to carry out inspections in accordance with Hartzell Service Bulletin No. 161A. Inspections must be done before Certificate of Airworthiness issue or STC incorporation, before installation if not done within the prior 500 hours, and repeated at intervals not exceeding 500 hours. Blades marked T10282N are exempt. The measure responds to increased engine torque raising the risk that scratches, marks or corrosion can cause fatigue and blade separation.

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AD/SWSA226/62 - Propeller Blade Separation

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/SWSA226/62 Propeller Blade Separation 9/91

Applicability: Hartzell model HC-B3TN-5C ( )/T10282 installed on Swearingen SA226-TC or SA226-AT aircraft, with Garrett TPE 331-1OUA engines, which have been modified by Airesearch Aviation Company STC SA344GL or either Par Air or Superior Aircraft Inc STC SA 4872SW.

Requirement: Action in accordance with Hartzell Service Bulletin No 161A.

Note 1: FAA AD 86-05-12 and 88-24-15 refer.

Note 2: Propellers fitted with T10282N blades are exempt from the requirements of this directive.

Compliance: Prior to issue of a Certificate of Airworthiness or upon incorporation of Airesearch Aviation Company STC SA 344GL-D or Par Air or Superior Aircraft Inc STC SA 4872SW. Re-inspect at intervals not exceeding 500 hours time in service.

Before installation on an aircraft unless previously accomplished within the preceding 500 hours time in service.

Background: Due to increased torque of which the subject engines are capable, the significance of scratches, scrapes, tool marks and/or corrosion pits in the pilot tube bore area is increased to the degree that fatigue failure causing blade separation is possible. The repetitive inspection now required on all S/No blades is now not required for a specific P/N blade due to its improved design characteristics.

This Directive is raised to incorporate the propeller inspection in the aircraft series.

Source text

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

1 AD/SWSA226/62 - Propeller Blade Separation