Airworthiness Directive · Amendment 39-14822 · Dowty Propellers R321/4-82-F/8; R324/4-82-F/9; R333/4-82-F/12; and R334/4-82-F/13 Propellers
Dowty Propellers R321/4-82-F/8; R324/4-82-F/9; R333/4-82-F/12; and R334/4-82-F/13 Propellers
This AD applies to Dowty Propellers R321/4-82-F/8; R324/4-82-F/9; R333/4-82-F/12; and R334/4-82-F/13 propellers, if blades are installed with serial numbers (SNs) A156121 through A156132; A156137 through A156160; A156165 through A156168; A156177 through A156184; A156194; and A156196 through A156200. These propellers are known to be installed on, but not limited to CASA 212; M7 Aerospace (formerly Fairchild; Swearingen) SA227TT, SA227AT, and SA227AC; and BAE Systems (formerly British Aerospace) Jetstream 3100 and 3200 series airplanes.
We are adopting a new airworthiness directive (AD) for the products listed above. 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:
Unless already done, do the following actions.
(1) Before next flight after the effective date of this directive, identify the propeller blades that have a SN listed in the applicability section of this directive and inspect the affected blades in accordance with the instructions contained in Dowty Propellers Alert Service Bulletin (ASB) No. 61-A1133, dated October 17, 2006, and ASB No. 61-A1134, dated October 17, 2006, as applicable.
(2) When discrepancies are found, before further flight the counterweight attachment hole must be re-machined. Contact Dowty Propellers for advice on re-machining the holes.
(3) After the effective date of this directive, no person may install one of the listed SN propeller blades on an aircraft unless the blade has been inspected and, if necessary, reworked in accordance with the requirements of this directive.
None.
The aircraft, engines and makers this AD names, by the model designations in its text. A model listed here may still be outside the AD's serial ranges.
Propellers
