# SDR BONA2026072126001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 21, 2026
- Submitted: July 21, 2026
- Operation: Air carrier
- Aircraft: [N103EZ](https://openairdocs.org/aircraft/N103EZ), registered now
- Make and model: Lear 45LEAR
- Aircraft serial: 45418
- Aircraft time: 4,719 hours, 4,373 cycles
- Engine: Hnywl TFE73120BR
- Engine time: 4,676 hours, 4,335 cycles
- System (JASC): [2612 · Fire Detection](https://openairdocs.org/jasc/2612)
- Part: Fire Warning
- Condition: False Activation
- Location: Zone 400
- Stage of operation: CL
- 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/BONA2026072126001

## Discrepancy

DURING CLIMBOUT AT MID 20 THOUSANDS ALTITUDE, L ENG FIRE WARNING ACTIVATED.  CREW REDUCED ENGINE POWER TO IDLE AND WARNING EXTINGUISHED.  CREW RETURNED FOR LANDING WITH NO FURTHER ABNORMAL INDICATIONS.  CAUSE OF FIRE WARNING IS UNKNOWN AT THIS TIME.

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