# SDR EISA99172

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 24, 1999
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: [N721RW](https://openairdocs.org/aircraft/N721RW), registered now
- Make and model: Boeing 727-2M7
- Registry model: [Boeing 727-2M7](https://openairdocs.org/model/boeing-727-2m7) (OpenAirDocs)
- Aircraft serial: 21200
- System (JASC): [2611 · Smoke Detection](https://openairdocs.org/jasc/2611)
- Part: Smoke Detector
- Part number: 774001
- Condition: Failed
- Location: Cargo Bay
- Component: 5360112
- Stage of operation: CL
- Nature of condition: N
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/EISA99172

## Discrepancy

ONCE DURING CLIMB AND ONCE DURING DESCENT, NR 4 SMOKE DETECTOR LIGHT ILLUMINATED BRIEFLY, NO SMOKE OBSERVED.  REMOVED AND REPLACED NR 4 SMOKE DETECTOR.  OPS CHECK NORMAL IAW MM 26-17-1.  (M)

---
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.