# SDR AALA202207067325

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 3, 2022
- Submitted: July 6, 2022
- Operation: Air carrier
- Aircraft: [N323SG](https://openairdocs.org/aircraft/N323SG), registered now
- Make and model: Boeing 737
- Aircraft serial: 44474
- Aircraft time: 4,168 hours, 1,619 cycles
- System (JASC): [2934 · Hydraulic Quantity Sensor](https://openairdocs.org/jasc/2934)
- Part: Transmitter
- Part number: 202190101
- Condition: Faulty
- Location: Zone 100 - Fuse
- Part time: 4,168 hours, 1,619 cycles
- Stage of operation: CR
- How discovered: V
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202207067325

## Discrepancy

AIRCRAFT WAS GROUNDED: IN FLIGHT, HYDRAULIC SYSTEM A PRESSURE DROPPED FROM 87% TO 58% SLOWLY OVER 1 HOUR AND 50 MINUTES. FLIGHT DECLARED AN EMERGENCY AND DIVERTED TO CUN, LANDING SAFELY. REPLACED HYDRAULIC SYSTEM A FLUID QUANTITY TRANSMITTER PER AMM 29-33-12. ACCOMPLISHED SATISFACTORY OPERATIONAL CHECK.

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