Service difficulty report · Combust Chamber · Bell 206B

Difficulty date
April 12, 2004
Submitted
April 26, 2004
Operation
Air carrier
Aircraft
N5005N
Make and model
Bell 206B
Aircraft serial
1931
Engine
Allsn 250C20
Part
Combust Chamber
Part number
6870992
Part serial
17579
Condition
Cracked
Location
Engine
Part time
7,664 hours
Stage of operation
NR
How discovered
9
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

NOTICE HIT TOT ON A NORMALLY COOL RUNNING TURBINE, OVER A PERIOD OF A FEW FLIGHTS TOT CLIMBED MORE. PERFORMED NORMAL BARFIELD TOT TESTING AND BLEED VALVE CLOSURE TESTS, THEN DID THE HAND FEEL TEST DURING START AND IDLE AND FOUND AIR LEAKAGE AT LEFT AFT AIR TUBE AREA. FOUND CRACK IN REINFORCED AIMPIT AREA OF COMBUSTION CASE. NO DAMAGE TO LINER AND GOOD PATTERN FROM FUEL NOZZLE. ORDERED COMBUSTION CASE FOR REPLACEMENT.

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