# SDR ASAA2017062021140

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 20, 2017
- Submitted: June 21, 2017
- Operation: Air carrier
- Aircraft: [N579AS](https://openairdocs.org/aircraft/N579AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35187
- Aircraft time: 39,221 hours, 11,687 cycles
- Engine: Cfmint CFM567B27
- System (JASC): [7720 · Engine Temperature Indicating System](https://openairdocs.org/jasc/7720)
- Part: Probe
- Part number: TC29602
- Condition: Out Of Tolerance
- Location: Nr 1 Engine
- 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/ASAA2017062021140

## Discrepancy

ACCOMPLISHED T/C 78273000, FOUND ECONOMIC FAULT CODE 77-20871 THE TOP LEFT EGT OUT OF RANGE NR 1 ENGINE.  ACFT GROUNDED. FOUND T49.5 S4 PROBE RESISTANCE VALUE OUT OF RANGE. REMOVED & REPLACED T49.5 S4 PROBE. OPS CHECK GOOD, REF B737-800 FIM 77-21 TASK 804, AMM 77-21-01, AND IPC 77-21-01-01.

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