Service difficulty report · Pulley · Tecnam P2006T

Difficulty date
June 8, 2020
Submitted
June 8, 2020
Operation
General aviation
Aircraft
N968GV
Make and model
Tecnam P2006T
Aircraft serial
247
Aircraft time
890 hours
Engine
Rotax ROTAX912S
Part
Pulley
Part number
2621056000
Part serial
247
Condition
Abnormal
Location
Ailerons
Part time
890 hours
Component
Aileron Control · Tecnam
Component part number
2691500000
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

AILERON CONTROL CABLES HAVE MULTIPLE BROKEN STRANDS WHERE THEY TRAVEL OVER METAL PULLEYS. THESE CABLES WHERE REPLACED 92 HOURS AGO, AND HAVE BREAKS IN THE SAME LOCATIONS. THE CABLES RUN OVER FOUR METAL PULLEYS, TWO ON THE RIGHT AND LEFT. THERE IS A 3:1 MISMATCH IN THE PULLEY CHANNEL SIZE AND THE CABLE DIAMETER, I BELIEVE THIS CONDITION TO BE CAUSING FAILURE OF THE CABLE AS IT IS FLATTENED OUT ON THE METAL PULLEY.