# SDR 99ZZZM111

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 5, 1998
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: N356QS
- Make and model: Boeing 727-21
- Registry model: [Boeing 727-21](https://openairdocs.org/model/boeing-727-21) (OpenAirDocs)
- Aircraft serial: 19258
- System (JASC): [2612 · Fire Detection](https://openairdocs.org/jasc/2612)
- Part: Power Supply
- Part number: 1014A
- Condition: Failed
- Location: Apu Bay
- Stage of operation: CL
- Nature of condition: N
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/99ZZZM111

## Discrepancy

FLT 216 - DAY-HSV - HAD AN AIR TURN BACK.  FIRE WARNING BELL WENT OFF AT 9,000 FT, NO FIRE WARNING LIGHTS.  REMOVED AND REPLACED APU FIRE DETECTION POWER SUPPLY.  (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.