Service difficulty report · Lock Tab · Skrsky S64E

Difficulty date
October 3, 2013
Submitted
October 3, 2013
Operation
General aviation
Aircraft
N957AC
Make and model
Skrsky S64E
Aircraft serial
64065
Aircraft time
29,841 hours, 16,641 cycles
Engine
Pwa JFTD12A4A
Engine time
9,893 hours
Part
Lock Tab
Part number
819858
Part serial
NONE
Condition
Broken
Location
3rd Stage Disk
Part time
2,375 hours
Component
Compressor · Pwa · JFTD12A4A
Component part number
JFTD12A4A
Stage of operation
FF
How discovered
V
Nature of condition
M
Precautionary procedure
A

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

What was found

DURING TEARDOWN OF THE COMPRESSOR CORE THERE WAS EXTENSIVE DAMAGE TO BLADES AND VANES FROM THE 3RD STAGE AFT. THE DAMAGE OCCURED WHEN THE AFT END OF A 3RD STAGE TABLOCK BROKE ALLOWING THE 3RD STAGE BLADE TO MOVE AFT CONTACTING THE 4TH STAGE STATOR. THE BLADE THEN BROKE OFF NEAR THE ROOT AND DEBRIS WENT AFT THROUGH THE COMPRESSOR.