Service difficulty report · Control Cable · Grob G120A

Difficulty date
July 9, 2010
Submitted
January 4, 2011
Operation
General aviation
Make and model
Grob G120A
Aircraft time
1,711 hours
Engine
Lyc AEIO540D4D5
Propeller
Hartzl HCC3YR
Part
Control Cable
Part number
120A6121
Condition
Chafed
Location
Propeller
Part time
2,044 hours
Stage of operation
TX
How discovered
O
Nature of condition
F
Precautionary procedure
O

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

What was found

(CAN) ON A PRE START CHECK, THE PILOT NOTED THE PROP LEVER NOT FUNCTIONING PROPERLY. THE CABLES ARE KNOWN BY MX TO START CHAFING AND BINDING INTERNALLY JUST FWD OF THE PROP CONTROL LEVER CABLE HSG ATTACH POINT TO THE ACFT STRUCTURE. SOME CABLE HSG ARE SECURED IN THE CENTER CONSOLE AREA AT AN ANGLE WHICH ACCELERATES THE WEAR OF THE INTERNAL WIRE WITHIN THE CABLE HSG. THE WEAR CAN DETERIORATE TO A POINT WHERE THE CABLE BEGINS TO BECOME MORE DIFFICULT TO MOVE. WITH EXPERIENCE, MX WILL KNOW WHEN TO REPLACE THE CABLE PRIOR TO FAILURE.

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