# SDR LR7A2020100902643

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 9, 2020
- Submitted: October 12, 2020
- Operation: Air carrier
- Aircraft: [N403LC](https://openairdocs.org/aircraft/N403LC), registered now
- Make and model: Lkheed 382G44K30
- Aircraft serial: 4590
- Aircraft time: 67,061 hours, 33,804 cycles
- System (JASC): [2612 · Fire Detection](https://openairdocs.org/jasc/2612)
- Part: Control Box
- Part number: 892541100
- Part serial: LJW599583
- Condition: Malfunctioned
- Location: Fire Detection
- Stage of operation: CL
- How discovered: O
- Nature of condition: N
- Precautionary procedure: F, A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/LR7A2020100902643

## Discrepancy

APU FIRE INDICATION ON CLIMB OUT.  APU WAS NOT RUNNING.  PULLED 'T' HANDLE, ISOLATED BLEED AIR, DISCHARGED BOTH FIRE BOTTLES.  INDICATION PERSISTED; DECLARED EMERGENCY AND RETURNED TO PABR.  REMOVED AND REPLACED FIRE DETECTION CONTROL BOX, IAW SMP581 CHAPTER 26-10.  OPERATION CHECK GOOD.

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