Service difficulty report · Compressor · Boeing 747230B

Difficulty date
June 16, 2000
Submitted
July 28, 2000
Operation
Air carrier
Make and model
Boeing 747230B
Engine
Ge CF650E2
Part
Compressor
Part number
1703M38G02
Part serial
GWNBK322
Condition
Cracked
Location
Engine
Part time
4,435 hours
Component
Hpcr Module · Ge
Component part number
3R
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

AFTER ENG AND MODULE DISASSEMBLY, ENG SHOP INSP GROUP FOUND DEBLADED HPC11-14TH SPOOL-SHAFT A VISIBLE CRACK. A SEPARATED PIECE OF 12TH STAGE DOVETAIL PRESSURE SURFACE EDGE (REAR SIDE) APPROX 1.5 INCHES LONG CIRCUMFERENTIALLY STARTING FROM A CRACK. PART PARAMETERS, SPOOL-SHAFT INSTALLED NEW 3-31-99 WITH ZERO TIME. FIRST RUN SPOOL-SHAFT HAD ACCUMULATED SINCE INSTALL, TT 4,435 HRS AND 824 CYCLES. ON 4-20-00, ENG CHANGE TAKEN PLACE. REASON FOR ENG MAINTENANCE WAS HIGH OIL CONSUMPTION. DURING ENGINE DISASSEMBLY, SOME BIRD DEBRIS WAS FOUND IN THE LPC. (X)