# SDR CALA2026070817615

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 6, 2026
- Submitted: July 8, 2026
- Operation: Air carrier
- Aircraft: [N23708](https://openairdocs.org/aircraft/N23708), registered now
- Make and model: Boeing 737724
- Aircraft serial: 28769
- Aircraft time: 85,305 hours, 31,581 cycles
- Engine: Cfmint CFM567B242
- System (JASC): [7722 · Engine EGT/TIT Indicating System](https://openairdocs.org/jasc/7722)
- Part: Probe
- Part number: TC29603
- Part serial: 298
- Condition: Faulted
- Location: Nr 1 Egt
- Part time: 69,173 hours, 39,721 cycles
- Stage of operation: CL
- How discovered: O
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2026070817615

## Discrepancy

EGT ON NR 1 ENG SHOWED 954 AND IN YELLOW AT CLIMB THRUST CLIMB THRUST PERFORMED FIM 71-06 TASK 804, NO RED BOX AROUND DIGITAL EGT INDICATION. PERFORMED EEC BITE PROCEDURE 73-00 TASK 801 AND FOUND FAULT MSSG 77-20861 (BOTTOM LEFT EGT OUT OF RANGE). INPUT MONITORING FOR T495 T495S3 CH B IS SHOWING A SIGNIFICANTLY HIGHER TEMP THAN S1. IAW FIM 77-21 TASK 803, PERF. ENG. 1 EGT CLEANING AND INSPECTION. NO DEFECTS NOTED. AFTER CLEANING, EGT FOR S3 SENSOR RETURNED INTO ACCEPTABLE RANGE. DUE TO HISTORY, AS PRECAUTION, R & R ENG. 1 S3 EGT PROBE IAW AMM 77-21-01. OPS CHECK GOOD. 5 MIN.  ALL ENG. 1 TEMPS REMAINED IN ACCEPTABLE RANGE.

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