# SDR ASAA12511388

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 11, 2012
- Submitted: April 13, 2012
- Operation: Air carrier
- Aircraft: [N559AS](https://openairdocs.org/aircraft/N559AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35178
- Aircraft time: 21,143 hours, 6,415 cycles
- Engine: Cfmint CFM567B27
- Engine time: 14,967 hours, 4,817 cycles
- System (JASC): [7200 · Engine (Turbine/Turboprop)](https://openairdocs.org/jasc/7200)
- Part: Engine
- Part number: UNKNOWN
- Condition: Malfunctioned
- Location: Nr 2
- Stage of operation: IN
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA12511388

## Discrepancy

AFTER 5 MINUTES AT 80 PERCENT, NR 2 ENGINE N1 EXPERIENCED LOTC N2 PEAKED AT 109% WITH ASSOCIATED MAINTENANCE MESSAGE 73-20332.  REMOVED NR 2 ENGINE PER T/C 78471000.  INSTALLED NR 2 ENGINE PER T/C 78471001 REF. W/O 159978.

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