Service difficulty report · Wire Harness · Gulstm GIV

Difficulty date
May 3, 2023
Submitted
October 20, 2023
Operation
General aviation
Aircraft
N222GY
Make and model
Gulstm GIV
Aircraft serial
1142
Part
Wire Harness
Condition
Failed
Location
Spoilers
Component
Position Sensor · FAILED
Component part number
75M91502
Stage of operation
NR
How discovered
9
Nature of condition
O
Precautionary procedure
O

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

What was found

THE SENSOR IS ATTACHED TO THE SPOILER AT THE HINGE POINT AND ROTATES WITH THE SPOILER WHEN IT IS DEPLOYED. THE SENSOR SHAFT IS CONNECTED AND INDEXED TO THE WING AND REMAINS STATIONARY DURING DEPLOYMENT. THE 3 WIRES THAT CONNECT THE SENSOR MUST TWIST WITH THE SENSOR ON EACH DEPLOY CYCLE, CAUSING STRESS ON THE WIRE HARNESS. THE WIRE WORK HARDEN AND BREAK. ALL 4 SPOILER WIRE HARNESS HAVE BROKEN.