SDR HEEA080428

Service difficulty report · Turbine Wheel · Skrsky S76A

Difficulty date
July 9, 2002
Submitted
July 22, 2002
Operation
Air carrier
Aircraft
N3122H
Make and model
Skrsky S76A
Aircraft serial
760233
Aircraft time
11,407 hours
Engine
Allsn 250C30S
Engine time
14,961 hours
Part
Turbine Wheel
Part number
23053299
Part serial
X146744
Condition
Damaged
Location
Engine
Part time
620 hours, 2,489 cycles
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

ENGINE REMOVED DUE TO NOISY TURBINE AND CRACKED EXHAUST COLLECTOR. UPON INSPECTION OF TURBINE PARTS NOTED SULFIDATION ON ALL 1ST STAGE WHEEL BLADES. BLADES TRAILING EDGES WERE BROKEN OFF DUE TO SULFIDATION. SCRAPPED AND REPLACED WITH SERVICEABLE PART.