Service difficulty report · Turbine Wheel · Emb EMB110P1

Difficulty date
November 24, 2015
Submitted
November 25, 2015
Operation
Air carrier
Aircraft
N117WA
Make and model
Emb EMB110P1
Aircraft serial
110388
Aircraft time
27,242 hours, 39,909 cycles
Engine
Pwa PT6A34
Engine time
22,686 hours, 29,044 cycles
Propeller
Hartzl HCB3TN3
Part
Turbine Wheel
Part number
3026812
Part serial
7X007
Condition
Disintegrated
Location
Rt Engine
Part time
19,418 cycles
Stage of operation
CR
How discovered
O
Nature of condition
Z
Precautionary procedure
E, A

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

What was found

THE PILOT REPORTED THAT IN CRUISE, APPROX 20 MINUTES AFTER TAKEOFF, THE RT ENG SURGED MORE THAN ONCE & HE ELECTED TO SHUT IT DOWN. HE THEN DECLARED AN EMER & DIVERTED, MAKING A SUCCESSFUL LANDING. A VISUAL INSPECTION WITH BORESCOPE BY MX PERSONNEL REVEALED MOST, IF NOT ALL, BLADES DISINTEGRATED ON BOTH THE COMPRESSOR & POWER TURBINES. SOME DAMAGE IN THE FORM OF NICKS & CURLED TOES IS VISIBLE ON THE SECOND STAGE COMPRESSOR BLADES ALSO. TURBINE BLADES DO NOT APPEAR TO HAVE SEPARATED AT THE FIR TREE ROOTS. THERE IS SOME RESIDUAL OIL ON THE INSIDE BOTTOM OF THE POWER SECTION. THIS WAS THE FIRST FLIGHT AFTER A RT HOT SECTION INSPECTION. THE SIGNIFICANCE OF THIS IS NOT YET KNOWN.

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