Service difficulty report · Turbine Wheel · Hughes 369E

Difficulty date
August 23, 2002
Submitted
October 10, 2002
Operation
Air carrier
Aircraft
N142MK
Make and model
Hughes 369E
Aircraft serial
0187E
Engine
Allsn 250C20B
Part
Turbine Wheel
Part number
6898735
Part serial
CAT20838F
Condition
Cracked
Location
Engine
Stage of operation
IN
How discovered
V
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

NR 1 LOCKUP WAS FOUND, HEAVY RUB OF THE 29-34 AIR SEAL OF THE 2ND STAGE TURBINE NOZZLE AND SEAL KNIVES OF THE 1ST STAGE TURBINE WHEEL. 1ST STAGE TURBINE WHEEL FOUND CRACKED IF NOT FOUND WOULD HAVE BEEN CATASTROPHIC, TURBINE WHEEL WOULD OF EXITED THE ENGINE.

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