# SDR CALA2016101200756

- Type: Service difficulty report (as reported; unverified)
- 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)](https://openairdocs.org/jasc/7200)
- Part: Engine
- Condition: Power Loss
- Location: Nr 4
- Stage of operation: CL
- How discovered: O
- Nature of condition: R, Y, J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2016101200756

## Discrepancy

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.

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