# SDR UIEA2022012800079

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 27, 2022
- Submitted: January 31, 2022
- Operation: Air carrier
- Aircraft: [N471MC](https://openairdocs.org/aircraft/N471MC), registered now
- Make and model: Boeing 747412
- Aircraft serial: 26557
- Aircraft time: 85,135 hours, 13,784 cycles
- System (JASC): [2930 · Hydraulic Indicating System](https://openairdocs.org/jasc/2930)
- Part: Transmitter
- Part number: FP0207A
- Part serial: 1046BA
- Condition: None
- Stage of operation: CL
- How discovered: V
- Nature of condition: N
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UIEA2022012800079

## Discrepancy

HYDRAULIC SYSTEM #4 RESERVOIR QUANTITY INDICATION GRADUALLY DECREASED IN FLIGHT.(<P>RETURNED TO DEPARTURE AIRPORT. REMOVED AND REPLACED # 4 HYD QTY TRANSMITTER PER AMM 29-33-01. NO LEAKS NOTED. HYD QTY SHOW NORMAL 1.05.</P>)

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