Service difficulty report · Control Cable · Piper PA28181

Difficulty date
December 13, 2014
Submitted
December 15, 2014
Operation
General aviation
Aircraft
N297PA
Make and model
Piper PA28181
Aircraft serial
2843506
Aircraft time
14,587 hours
Engine
Lyc O360A4M
Propeller
Snsnch 76EM8S5
Part
Control Cable
Part number
455352
Condition
Separated
Location
Mixture
Stage of operation
IN
How discovered
V
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 A ROUTINE ENGINE INSPECTION, A TECH NOTED THE RUBBER BOOT COVERING THE SWAGE ON THE END OF THE MIXTURE CONTROL CABLE WAS BROKEN APART; HE WROTE UP THE CABLE AND BEGAN TO REMOVE IT. AS HE WAS PULLING THE CABLE OUT OF THE FIREWALL, THE SWAGE CAME OPEN AND REVEALED THAT THE CABLE WAS WORN TO THE POINT IT WAS COMPLETELY SEPARATED. IF THE WEAR WOULD HAVE PROGRESSED FURTHER, THE CABLE WOULD HAVE INTERNALLY SEPARATED COMPLETELY AND COULD HAVE CAUSED A LOSS OF MIXTURE CONTROL. BECAUSE THE CABLE IS COMPLETELY COVERED BY THE OUTER SLEEVE, THERE IS NO WAY TO VISUALLY INSPECT FOR WEAR UNLESS THE CABLE END SWAGE IS PULLED APART, WHICH DESTROYS THE CABLE. THE MFG DOES NOT RECOMMEND A SERVICE LIMIT FOR ENGINE CONTROL CABLES.

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