# SDR ASAA2021011933899

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 19, 2021
- Submitted: January 21, 2021
- Operation: Air carrier
- Aircraft: [N409AS](https://openairdocs.org/aircraft/N409AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 41733
- Aircraft time: 29,189 hours, 9,441 cycles
- System (JASC): [2697 · Fire Protection System Wiring](https://openairdocs.org/jasc/2697)
- Part: Connector
- Condition: Dirty
- Location: 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/ASAA2021011933899

## Discrepancy

DURING LL1 FOUND ENGINE 1 FIRE LOOP B SHOWS FAULT.  GROUNDED-YES.  CLEANED CONNECTORS OF FIRE DETECTION HARNESSES MW0325, MW0326 CHECKED ALL CONNECTIONS.  ACCOMPLISHED GVI OF FIRE LOOPS OPERATIONS CHECK NORMAL, REF B737-900 AMM 26-11-00.

---
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.