What was found
DURING CLIMB, HAD A SURGE ON THE NR 4 ENGINE WITH N1 AND N2 ROLL BACK AC YAW AND SPIKE IN EGT TO AP PROX 740. CREW REPORTS ENGINE DID NOT RECOVER AND THEY SHUTDOWN THE ENGINE. R & R THE NR 4 ENGINE.
- Difficulty date
- October 12, 2016
- Submitted
- October 12, 2016
- Operation
- Air carrier
- Aircraft
- N116UA
- Make and model
- Boeing 747422
- Aircraft serial
- 26908
- Aircraft time
- 70,937 hours, 7,960 cycles
- Engine
- Pwa PW4056
- System (JASC)
- 7200 · Engine (Turbine/Turboprop)
- Part
- Engine
- Condition
- Power Loss
- Location
- Nr 4
- Stage of operation
- CL
- How discovered
- O
- Nature of condition
- R, Y, J
- Precautionary procedure
- A
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.