What was found
NR 1 ENGINE, FUEL IS LEAKING AT TURBINE CASE SEAM FROM INSIDE OF ENGINE AT ENGINE CASE SEAM "M" AND "N". RAN NR 1 ENGINE AND FOUND NO LEAKS AT TURBINE CASE SEAMS, DID FIND LEAK AT NR 1 ENG DIVERTER VALVE.
- Difficulty date
- March 9, 2012
- Submitted
- March 15, 2012
- Operation
- Air carrier
- Aircraft
- N128UA
- Make and model
- Boeing 747422
- Aircraft serial
- 30023
- Aircraft time
- 48,088 hours, 5,693 cycles
- Engine
- Pwa PW4056
- System (JASC)
- 7320 · Fuel Controlling System
- Part
- Valve
- Part number
- 7883662
- Part serial
- 25066
- Condition
- Leaking
- Location
- Nr 1 Engine
- Stage of operation
- IN
- How discovered
- O
- Nature of condition
- K
- Precautionary procedure
- K
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.