# SDR CALA2023031300731

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 13, 2023
- Submitted: March 13, 2023
- Operation: Air carrier
- Aircraft: [N76515](https://openairdocs.org/aircraft/N76515), registered now
- Make and model: Boeing 737-8
- Registry model: [Boeing 737-8](https://openairdocs.org/model/boeing-737-8) (OpenAirDocs)
- Aircraft serial: 31623
- Aircraft time: 46,776 hours, 16,392 cycles
- System (JASC): [7700 · Engine Indicating System](https://openairdocs.org/jasc/7700)
- Part: Probe
- Part number: NA
- Condition: Unknown
- Location: Eng #1
- Stage of operation: CR
- How discovered: O
- Nature of condition: O
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2023031300731

## Discrepancy

ENGINE 1 HIGH EGT NUMEROUS TIMES ERRATIC INDICATIONS EGT SIGNAL OUT OF RANGE. MAYBE REFER TO LOGPAGE 4027334 EGC. REPORT FROM CREW: #1 ENG BACK TO IDLE. NOT SHUT DOWN. HIGHEST UPLOAD PIC OF T49.5 SENSOR READINGS, S4 IS READING DASHES. EGT WAS AROUND 850 AND DROPPED. NO EXCEEDANCES FOR ENG #1. PERFORMED EEC BITE PROCEDURE PER FIM 73-00-00-810-801. FOUND MSG # 77-20861 BOTTOM LEFT EGT OUT OF RANGE. MSG # 77-20871 TOP LEFT. CHANGED ENG#1 S3 EGT PROBE. CHANGED ENG#1 S4 EGT PROBE. BOTH OPS TEST GOOD. J10 HARNESS ENG#1 AND ENG#1 CJ10 HARNESS BOTH TEST PASSED. OK TO CONTINUE.

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