# SDR ASAA2018013123352

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 31, 2018
- Submitted: February 12, 2018
- Operation: Air carrier
- Aircraft: [N570AS](https://openairdocs.org/aircraft/N570AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35185
- Aircraft time: 41,751 hours, 12,375 cycles
- System (JASC): [2613 · Overheat Detection](https://openairdocs.org/jasc/2613)
- Part: Wire Harness
- Part number: 32502740306060
- Condition: Broken
- Location: Nr 1 Overheat Lo
- Stage of operation: NR
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2018013123352

## Discrepancy

NR 1 ENGINE OVERHEAT DETECTOR LOOP B,  NOT TESTING CORRECTLY.  FAULT LIGHT ILLUMINATED.  ACFT GROUNDED.   FOUND BROKEN TERMINATION AND CHAFING ON UPPER LEFT DETECTOR NR 2 WIRING. REPLACED THE NR 1 ENGINE FAN HARNESS,  UPPER & LOWER FAN FIRE DETECTORS, AND ORE HARNESS IAW AMM 26-11-02/401. OPS CHECKED GOOD IAW AMM 26-11-00-710-801.

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