Service difficulty report · Gearbox · Snias AS350B3

Difficulty date
September 24, 2020
Submitted
September 25, 2020
Operation
Air carrier
Aircraft
N530H
Make and model
Snias AS350B3
Aircraft serial
4553
Aircraft time
7,570 hours, 14,846 cycles
Engine
Tmeca ARRIEL2B1
Engine time
3,629 hours, 11,941 cycles
Part
Gearbox
Part number
350A33020007
Part serial
MA2429
Condition
Making Metal
Location
Tail Rotor
Part time
3,915 hours, 2,776 cycles
Stage of operation
CR
How discovered
O
Nature of condition
J
Precautionary procedure
A

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

What was found

PILOT REPORTED A TAIL ROTOR CHIP LIGHT DURING CRUISE FLIGHT. IT FLICKERED AT FIRST, AND AFTER ABOUT 30 SECONDS CAME ON SOLID. THE PILOT IMMEDIATELY DIVERTED TO THE CLOSEST AIRPORT. ONCE SAFELY ON THE GROUND, HE CONTACTED MAINTENANCE. THE MECHANIC ARRIVED AND INSPECTED THE CHIP DETECTOR, AND FOUND A FEW METAL SHAVINGS. HE THEN CLEANED THE CHIP DETECTOR, AND FLUSHED THE TAIL ROTOR GEARBOX TWICE. AFTER DRAINING, THE TRG OIL STILL HAD FERROUS AND NON-FERROUS MATERIAL. NOTIFIED AIRBUS TECH REP AND RMD. ORDERED A TRGB AOG. THIS AIRCRAFT REMAINS OUT OF SERVIC AT THIS TIME, WHILE THE TRGB IS REPLACED.