# SDR DALA2019030401403

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 28, 2019
- Submitted: March 4, 2019
- Operation: Air carrier
- Aircraft: N935DN
- Make and model: Doug MD-90-30
- Registry model: [Doug MD-90-30](https://openairdocs.org/model/mcdonnell-douglas-md-90-30) (OpenAirDocs)
- Aircraft serial: 53460
- Aircraft time: 46,946 hours, 29,507 cycles
- System (JASC): [2612 · Fire Detection](https://openairdocs.org/jasc/2612)
- Part: Amplifier
- Condition: Defective
- Location: Fire Warning
- Stage of operation: UK
- How discovered: O
- Nature of condition: N
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DALA2019030401403

## Discrepancy

SHIP 9235 - DIV - DUE TO L ENG FIRE DET FAULT EOAP MESSAGE ACCOMPANIED BY A B LOOP LIGHT ON THE OVERHEAD FIRE PANEL. SELECTED A LOOP AND LIGHT EXTINGUISHED. CORRECTIVE ACTION: VISUALLY INSPECTED ALL FIRE LOOPS AND ASSOCIATED CONNECTION AND WIRING. NO VISIBLE DEFECTS NOTED. REPLACED LT ENG. FIRE DETECTOR AMPLIFIER. PLACED LT ENGINE B LOOP ON MEL 26-11-01. CORRECTIVE ACTION : FOUND 18K OHMS ON PIN2 OF P1-8088. REPLACED WIRE ASSEMBLY 9U001B/R18. (LP# 5224076)

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