Service difficulty report · Seal · Boeing 777*

Difficulty date
April 11, 2005
Submitted
April 26, 2005
Operation
General aviation
Make and model
Boeing 777*
Aircraft serial
PPVRC2
Engine
Ge GE9090B
Part
Seal
Part number
1847M96P02
Part serial
GWN00JE0
Condition
Cracked
Location
Hpt Rotor
Part time
11,868 hours
Component
Hpt Rotor · Ge
Component part number
1975M57601
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

MDR/001/05: DURING ENG O/H, 2 CRACKS WERE NOTED ING THE HPT INTERSTAGE SEAL. CRACKS ARE ABOUT 45 DEGREES APART AND APPEAR TO ORIGINATE IN THE FWD ARM, OUTER DIAMETER. BOTH CRACKS ARE THROUGH FORWARD RETAINER AND CATENARY. 1 PASSES THROUGH BOTH SEAL TEETH AND THE OTHER HAS STARTED DOWN THE SEAL WEB. (K)