# SDR ASAA2017091621954

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 16, 2017
- Submitted: September 20, 2017
- Operation: Air carrier
- Aircraft: [N471AS](https://openairdocs.org/aircraft/N471AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 41703
- Aircraft time: 11,911 hours, 3,940 cycles
- System (JASC): [7722 · Engine EGT/TIT Indicating System](https://openairdocs.org/jasc/7722)
- Part: Probe
- Condition: Out Of Limits
- Location: Nr 1 Engine Egt
- Stage of operation: IN
- How discovered: O
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2017091621954

## Discrepancy

WHILE PERFORMING MAINTENANCE, FOUND FAULT MESSAGE 77-10841 FOR THE TOP RIGHT EGT SIGNAL OUT OF RANGE, ECONOMIC ON NR 1 ENGINE,  ACFT GROUNDED.  REMOVED AND REPLACED NR 1 ENGINE S1 T495.5 PROBE IAW AMM 77-21-01. OPS TESTED NORMAL.

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