Service difficulty report · O-Ring · Aerosp ATR42300

Difficulty date
July 14, 2020
Submitted
August 21, 2020
Operation
Air carrier
Aircraft
N918FX
Make and model
Aerosp ATR42300
Aircraft serial
262
Aircraft time
29,147 hours, 37,393 cycles
Engine
Pwa PW120
Propeller
Hamstd 14SF5
Part
O-Ring
Condition
Leaking
Location
Prop Control
Component
Controller · Hamstd
Component part number
78249051
Stage of operation
CR
How discovered
O
Nature of condition
R
Precautionary procedure
E, A

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

What was found

DURING CRUISE RT TORQUE UNCOMMENCED TORQUE INDICATED 120%, ACCOMPANIED AIRPLANE ASSEMETRY. MAINTENANCE FOUND PROPELLER CONTROL UNIT O-RING LEAKING AT REDUCTION GEAR BOX. REPLACED O-RING OPERATIONALLY CHECKS GOOD. PER PRATT & WHITNEY MM 05-50-00 OVERTORQUE WAS IN "AREA A", REQUIRING NO FURTHER MAINTENANCE ACTION.

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