# SDR ASAA2018031523887

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 15, 2018
- Submitted: March 15, 2018
- Operation: Air carrier
- Aircraft: [N469AS](https://openairdocs.org/aircraft/N469AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 41702
- Aircraft time: 14,366 hours, 4,769 cycles
- Engine: Cfmint CFM567B27E
- System (JASC): [7720 · Engine Temperature Indicating System](https://openairdocs.org/jasc/7720)
- Part: Probe
- Condition: Dirty
- Location: Egt
- Stage of operation: NR
- How discovered: O
- Nature of condition: N
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2018031523887

## Discrepancy

DIAGNOSTICS REPORTED NR 2 ENGINE TREND DATA SHOWS A SHIFT IN EGT HOT DAY MARGIN ALL OTHER PARAMETERS NORMAL.  EGT INDICATION ERRORS ARE SUSPECTED.  ACFT GROUNDED.  PERFORMED A NR 2 ENGINE BITE. FOUND ECONOMIC FAULT 77-10842 ON RECENT FAULTS AND FAULT HISTORY.  FOUND THE T49.5 S1 DASHED OUT UNDER INPUT MONITORING.  PERFORMED AN EGT AND TEMP PROBE CLEANING. S1 READINGS RESTORED IAW AMM 77-21-00.

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