# SDR 2005UALA00257

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 21, 2005
- Submitted: March 29, 2005
- Operation: Air carrier
- Aircraft: [N341UA](https://openairdocs.org/aircraft/N341UA), registered now
- Make and model: Boeing 737322
- Aircraft serial: 24245
- Aircraft time: 48,429 hours, 26,061 cycles
- Engine: Ge CFM56*
- System (JASC): [2613 · Overheat Detection](https://openairdocs.org/jasc/2613)
- Part: Overheat Loop
- Condition: Malfunctioned
- Location: Nr 2 Engine
- Stage of operation: CL
- How discovered: O
- Nature of condition: M, J
- Precautionary procedure: E, A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2005UALA00257

## Discrepancy

RETURNED TO ORD DUE TO NR 2 ENGINE OVERHEATED AND SHUTDOWN.  CREW REPORTED NR 2 ENGINE OVERHEAT INDICATION AT CLIMB.  CREW SHUT DOWN NR 2 ENGINE PER QRC.  PERFORMED TROUBLESHOOTING OF THE OVERHEAT DETECTION SYSTEM.  FOUND NR 2 ENGINE CORE DETECTOR M1122, LOOPS A & B WITH LOW RESISTANCE SHORT TO GROUND.  REMOVED AND REPLACED OVERHEAT DETECTOR CORE LOOPS A & B.  ENGINE OVERHEAT DETECTION SYSTEM TESTED NORMAL.

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