Service difficulty report · Nozzle · Bell 206L

Difficulty date
September 16, 2014
Submitted
March 12, 2015
Operation
General aviation
Make and model
Bell 206L
Aircraft time
24,661 hours
Engine
Allsn 250C20R
Part
Nozzle
Part number
23031968AL
Condition
Cracked
Location
Turbine Section
Stage of operation
IN
How discovered
9
Nature of condition
O
Precautionary procedure
K

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

What was found

(CAN) TURBINE MODULE SENT IN FOR O/H. DURING PART INSPECTION AFTER UNIT DISASSEMBLY THE NOZZLE WAS SCRAPPED FOR OUTER BAND CRACKS AS WELL AS FILLET CRACK AT THE VANE AREAS. THE DIAPHRAGM WAS ALSO DISCOVERED CRACKED THRU AT ABOUT 80 PERCENT OF THE UNITS CIRCUMFERENCE. THIS TYPE OF CRACKING ON THE DIAPHRAGM IS NOT TYPICAL DAMAGE SEEN DURING O/H INSPECTION.

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