AD/SWSA226/62 - Propeller Blade Separation

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

SCHEDULE OF AIRWORTHINESS DIRECTIVES

Fairchild (Swearingen) SA226 and SA227 Series Aeroplanes

AD/SWSA226/62 Propeller Blade Separation 9/91

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.

Action in accordance with Hartzell Service Bulletin No 161A.

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

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

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.

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.