Service difficulty report · Tach Box · Snias AS350B

Difficulty date
March 4, 1996
Submitted
March 26, 2000
Operation
Air carrier
Make and model
Snias AS350B
Engine
Tmeca ARRIEL1B
Part
Tach Box
Part number
0177555170
Condition
Shorted
Location
Engine
Stage of operation
HO
Nature of condition
J, R
Precautionary procedure
B

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

What was found

(CAN) SENSOR BOX THAT ACTIVATES ENGINE BLEED VALVE FAILED IN FLIGHT. FAILURE CAUSES BLEED VALVE TO REMAIN OPEN CAUSING REDUCED AVAILABLE ENGINE POWER. FAILURE WAS ACCOMPANIED BY BURNING ELECTRICAL SMELL.