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Fri, Oct 07, 2011

AD: Dowty Propellers (GE)

AD NUMBER: 2011-19-02

MANUFACTURER: Dowty Propellers Type R212/4-30-4/22 and R251/4-30-4/49 Propeller Assemblies
SUBJECT: Airworthiness Directive 2011-19-02
ACTION: Final rule.

SUMMARY: This AD results from mandatory continuing airworthiness information (MCAI) issued by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as:

Reports have been received from a small number of HS.748 operators of finding cracks in the propeller hub port buttress threads of R212 and R251 propellers. The affected hubs had accumulated in excess of 6,000 flight hours. This condition, if not detected and corrected, could lead to propeller blade separation, possibly resulting in damage to the aeroplane and/or injury to persons on the ground.

The FAA is issuing this AD to prevent propeller hub failure due to cracks in the hub, which could result in damage to the airplane.

DATES: This AD becomes effective November 9, 2011



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