Service difficulty report · Turbine · Snias AS350B

Difficulty date
June 14, 2000
Submitted
June 23, 2000
Operation
General aviation
Make and model
Snias AS350B
Aircraft time
5,787 hours
Engine
Tmeca ARRIEL1B
Part
Turbine
Part number
M031070
Condition
Failed
Location
Fuel Inject
Part time
59,300 hours, 95,010 cycles
Component
Turbine Section
Stage of operation
TO
How discovered
V
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

(CAN) DURING START PROCEDURE STARTER WAS UNABLE TO MOTOR ENGINE. AFTER INSPECTING ENGINE FOR F.O.D. AND REMOVING COMPONENTS ON THE ACCESSORY GEARBOX,, ENGINE WAS DISMANTLED TO ISOLATE THE LOCK UP. LOCK UP WAS FOUND TO BE IN THE GAS PRODUCER ASSEMBLY (M024M03). ASSEMBLY WAS SENT TO REPAIR CENTER WHERE IT WAS FOUND TO BE FUEL COKING ON THE LABYRINTH SEALS OF THE CENTRIFUGAL INJECTION WHEEL.