Service difficulty report · Tube · Snias AS350B2

Difficulty date
March 26, 2012
Submitted
March 29, 2012
Operation
Air carrier
Aircraft
N577AM
Make and model
Snias AS350B2
Aircraft serial
4425
Aircraft time
1,234 hours, 3,260 cycles
Engine
Tmeca ARRIEL1D1
Engine time
1,234 hours, 3,260 cycles
Part
Tube
Part number
0301008030
Condition
Sheared
Location
Lt Engine
Part time
1,234 hours, 3,260 cycles
Stage of operation
TX
How discovered
O
Nature of condition
K
Precautionary procedure
O

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

What was found

PILOT ATTEMTED START PROCEDURE WITH NO SUCCESSFUL LIGHT OFF. FUEL WAS FOUND ON THE ENGINE DECK, DOWN THE DECK DRAIN TUBES, AND ON PORTIONS OF THE LT SIDE OF THE ENGINE. FOUND THAT THE LT INJECTOR TUBE WAS SHEARD FLUSH WITH THE END OF THE FLARE SUPPORT, .1250 IN PAST THE FACE OF THE B-NUT ON THE UPPER SIDE OF ASSY ON THE TUBE. ON INTIAL INSPECTION OF THE BREAK IN THE UPPER SECTION OF THE TUBE, REMAINING PART OF THE LINE WAS APPROX 5 MM OFF CENTER FROM WHERE THE SHEAR POINT IS, INDICATING THE LINE WAS UNDER SLIGHT TENSION. AFTER THE TUBE WAS REMOVED, INSPECTED THE LOWER SECTION OF THE TUBE AND FOUND SMALL DETENTS AND RUB MARKS AROUND THE OUTSIDE OF THE LINE MATCHING UP PERFECTLY WITH THE INNER SIDE OF THE FLARE SUPPORT. MEASURMENT AROUND THESE MARKS WHERE AT 0.2325", AT THE POINT OF WEAR MARKS RECORDED 0.2310