# SDR 4TXA202512120001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 9, 2025
- Submitted: December 12, 2025
- Operation: Air carrier
- Aircraft: [N804TJ](https://openairdocs.org/aircraft/N804TJ), registered now
- Make and model: Boeing 737401
- Aircraft serial: 23988
- Aircraft time: 76,338 hours, 60,368 cycles
- System (JASC): [2910 · Hydraulic System, Main](https://openairdocs.org/jasc/2910)
- Part: Hydraulic System
- Condition: Leaking
- Location: Zone 400
- Stage of operation: CL
- How discovered: O
- Nature of condition: K, J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/4TXA202512120001

## Discrepancy

DURING TAKE-OFF FO NOTICED HYDRAULIC SYSTEM A "LOW PRESSURE" LIGHT ILLUMINATED. THEN CHECKED SYSTEM A HYDRAULIC QUANTITY WHICH WAS FOUND TO BE AT 0. PILOTS IMMEDIATELY DECLARED EMERGENCY.

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