# SDR CALA2026031714625

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 13, 2026
- Submitted: March 17, 2026
- Operation: Air carrier
- Aircraft: [N77261](https://openairdocs.org/aircraft/N77261), registered now
- Make and model: Boeing 737824
- Aircraft serial: 31582
- Aircraft time: 77,486 hours, 27,091 cycles
- System (JASC): [7720 · Engine Temperature Indicating System](https://openairdocs.org/jasc/7720)
- Part: Thermocouple
- Part number: TC29603
- Part serial: YC571772B
- Condition: Faulted
- Location: Nr 2 Engine
- Part time: 37,773 hours, 13,539 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/CALA2026031714625

## Discrepancy

EGT ON CLMB OUT IN YELOW SAW 928 W/ A/T ON.  PULLED THROTTLE BAC K TO NORMAL.A/T ON GOES TO928R & R CJ 10 HARNESS REF AMM 73-21-06-400-803-F00 INSTALLATION. REQUIRES FADEC SYSTEM TEST. IDT TASK, INSPECTED INSTALLATION E2 CJ10 HARNESS ROUTING AND SECURITY REF GMM 09-10-05.  REQ'S FADEC SYS TEST. BEFORE INSTALLATION NO RECENT FAULTS: ON ENG 1 & ENG 2. FOUND FAULT ON ENG 2 FAULT HISTORY: LONG TIME FAULT AND ECONOMIC FAULT HAVE #77-20862 BOTTOM LEFT EGT SIGNAL OUT OF RANGE, & FAULT #77-20872 TOP LEFT EGT SIGNAL OUT OF RANGE,   R&R #2 ENGINE BOTTOM LEFT T49.5 PROBE (T495S3) PER AMM 77-21-01. REQUIRES T49.5 PROBE INSTALLATION TEST PER AMM 77-21-01 PAR H.

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