# SDR UIEA2021061901384

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 19, 2021
- Submitted: June 22, 2021
- Operation: Air carrier
- Aircraft: [N477MC](https://openairdocs.org/aircraft/N477MC), registered now
- Make and model: Boeing 747-47UF
- Registry model: [Boeing 747-47UF](https://openairdocs.org/model/boeing-747-47uf) (OpenAirDocs)
- Aircraft serial: 29255
- Aircraft time: 91,400 hours, 16,143 cycles
- System (JASC): [2910 · Hydraulic System, Main](https://openairdocs.org/jasc/2910)
- Part: Shutoff Valve
- Part number: AV16E1305
- Part serial: T17228C
- Condition: Failed
- Location: Rt Wing Hyd Sys
- Stage of operation: CL
- How discovered: O
- Nature of condition: J
- Precautionary procedure: J, A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UIEA2021061901384

## Discrepancy

FLT CONTROL VALVES CAUTION MESSAGE.  REMOVED AND REPLACED FLIGHT CONTROL HYD SHUT-OFF MODULE, OPS CHECK OF ALL FLIGHT CONTROL SHUT OFF VALVES GOOD PER AMM 27-13-00 AND 27-23-00.   REPLACED THE NR 1 WING HYD SHUT OFF VALVE PER AMM 27-13-01.

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