# SDR ASAA2023031342385

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 13, 2023
- Submitted: March 17, 2023
- Operation: Air carrier
- Aircraft: [N486AS](https://openairdocs.org/aircraft/N486AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 44107
- Aircraft time: 27,792 hours, 8,733 cycles
- System (JASC): [2610 · Detection System](https://openairdocs.org/jasc/2610)
- Part: Unknown
- Condition: Unknown
- Location: Unknown
- Stage of operation: NR
- How discovered: V
- Nature of condition: J
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2023031342385

## Discrepancy

ENG #1 OVERHEAT CAUTION LIGHT DOES ILLUMINATE DURING OVHT/FIRE TEST WITH SWITCH IN NORMAL POSITION. LOOP A TESTS OK. GROUNDED - YES.  ON INITIAL EVALUATION RETURNED ENGINE 1 LOOP SELECTOR TO NORMAL POSITION. OPERATIONAL TEST OF FIRE DETECTION SYSTEM GOOD. ACCOMPLISHED BITE TEST OF FIRE DETECTION MODULE, NO FAULTS DISPLAYED. AS PRECAUTION, ACCOMPLISHED B737-900 FIM 26-10 TASK 805, CLEANED AND TORQUE CHECKED LOOP B TERMINAL LUGS AND ACCOMPLISHED GVI OF DETECTORS. OPS CK OF FIRE DETECTION SYSTEM GOOD. NO DEFECTS NOTED.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.