Service difficulty report · Retainer · Cndair CL2156B11415

Difficulty date
February 17, 2005
Submitted
April 1, 2005
Operation
General aviation
Make and model
Cndair CL2156B11415
Aircraft time
1,688 hours
Engine
Pwa PW123
Propeller
Hamstd 14SF*
Part
Retainer
Part number
7827402
Condition
Loose
Location
Actuator
Component
Actuator · Hamstd
Component part number
7901803
Stage of operation
IN
How discovered
V
Nature of condition
W
Precautionary procedure
K

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

(CAN) RETAINER, UNIVERSAL WAS FOUND WITH RELATIVE MOTION BETWEEN RETAINER AND RING, IPL 5-270C. CRIMPS (DIMPLES) HAD WORN OFF OF ONE OF FOUR DIMPLES ALMOST COMPLETELY, HALF THE DIAMETER OF TWO OTHERS. REPAIR 9-1 DETAILS INSTRUCTIONS FOR REPLACEMENT OF THE RETAINER. THE INSPECTION FOR RELATIVE MOTION BETWEEN THE RETAINER AND RING IS LISTED AS A (DCC), DESIGN CRITICAL CHARACTERISTICS, WHICH THERE IS NO MOVEMENT ALLOWED IAW THE REPAIR. THE RETAINER IS PART OF THE PITCH LOCK VALVE ASSEMBLY OF THE ACTUATOR. IF THE RETAINER WERE TO COME OFF OF BLADE ANGLE. IT COULD ALSO ALLOW THE PIVOT PINS IPL 5-260C TO COME OUT THE RING, WHICH COULD CAUSE A TOTAL LOSS OF CONTROL OF PITCH CHANGE FOR THE PROPELLER.