# SDR ASAA2020072722941

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 22, 2020
- Submitted: July 27, 2020
- Operation: Air carrier
- Aircraft: [N584AS](https://openairdocs.org/aircraft/N584AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35682
- Aircraft time: 48,020 hours, 14,202 cycles
- System (JASC): [2697 · Fire Protection System Wiring](https://openairdocs.org/jasc/2697)
- Part: Connector
- Condition: Corroded
- Location: B Fire Loop
- Stage of operation: IN
- How discovered: C
- Nature of condition: L
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2020072722941

## Discrepancy

NR 2 ENGINE B SIDE FIRE LOOP WILL NOT TEST.  GROUNDED - YES.  PERFORMED FIM 26-10, TASK 810.  BITE CHECK SHOWS FAULTED ENGINE 2 LOOP B LOW DETECTOR RESISTANCE.  CLEANED CONNECTIONS.  PERFORMED RESISTANCE CHECK ON ALL FIRE LOOPS ALL RESISTANCE WITHIN LIMITS.  FOUND OIL CONTAMINATION ON B LOOP ENG FAN LWR LOOP B TERMINAL,  CLEANED TERMINAL AND POST, AND SECURED. FOUND CORROSION ON THE ENG CORE LEFT LOOP B,  REMOVED CORROSION AND SECURED. ALL TESTS PASSED. FAULT NO LONGER ACTIVE.

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