Airworthiness Directives; Dowty Propellers Type R321/4-82-F/8, R324/4-82-F/9, R333/4-82-F/12, and R334/4-82-F/13 Propeller Assemblies
airworthiness · Rule · Final rule; request for comments. · Published 2005-12-12 · Effective 2005-12-27 · 70 FR 73364
Document
Document number
05-23826
Federal Register citation
70 FR 73364
Type
Rule
Action
Final rule; request for comments.
Category
airworthiness
Manufacturer
Dowty
Publication date
2005-12-12
Effective date
2005-12-27
FAA docket
Docket No. 2001-NE-50-AD
Abstract
The FAA is superseding an existing airworthiness directive (AD) for Dowty Propellers Type R321/4-82-F/8, R324/4-82-F/9, R333/4-82- F/12, and R334/4-82-F/13 propeller assemblies. That AD currently requires initial and repetitive ultrasonic inspections of propeller hubs, part number (P/N) 660709201. This AD requires the same initial and repetitive ultrasonic inspections, but makes some needed corrections. This AD results from comments received on AD 2005-20-12. We are issuing this AD to prevent propeller hub failure due to cracks in the hub, which could result in loss of control of the airplane.