Service difficulty report · Cam

Difficulty date
August 21, 2019
Submitted
August 21, 2019
Operation
General aviation
Engine
Cont E225*
Part
Cam
Part number
ES1040016710
Condition
Cracked
Location
Magneto
Component
Magneto · Cont · S6LN21
Component part number
105136547
Stage of operation
IN
How discovered
9
Nature of condition
O
Precautionary procedure
K

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

What was found

DURING THE OVERHAUL OF THE MAGNETO IMPULSE CAM ASSEMBLY WAS REPLACED. THE TORQUE OF 200 INCH LBS. WAS USED TO INSTALL THE IMPULSE ASSEMBLY. THE UNIT WAS THEN TEST RUN AND TESTED GOOD. UPON RECHECK OF THE TORQUE IT WAS FOUND TO NOT HAVE ANY. UPON INSPECTION THE CAM ASSEMBLY WAS FOUND CRACKED AT THE KEYWAY LOCATION. THIS ES10-400167-10 CAM SHOULD NOT HAVE FAILED AT THIS TORQUE. THE MANUAL CALLS OUT 190-300 INCH LBS. TORQUE AS THE LIMITS THAT YOU NEED TO WORK WITHIN. THIS WAS A NEW PART OUT OF THE BOX!!