# SDR UIEA2020052901157

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 29, 2020
- Submitted: May 29, 2020
- Operation: Air carrier
- Aircraft: [N412MC](https://openairdocs.org/aircraft/N412MC), registered now
- Make and model: Boeing 747-47UF
- Registry model: [Boeing 747-47UF](https://openairdocs.org/model/boeing-747-47uf) (OpenAirDocs)
- Aircraft serial: 30559
- Aircraft time: 81,204 hours, 13,167 cycles
- System (JASC): [2910 · Hydraulic System, Main](https://openairdocs.org/jasc/2910)
- Part: Hydraulic Line
- Part number: BACH8A18EE0380B
- Condition: Leaking
- Location: Lt Wlg
- Stage of operation: CL
- How discovered: O
- Nature of condition: K
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UIEA2020052901157

## Discrepancy

HYD QTY 4 WENT TO ZERO ON GEAR RETRACTION.  FOUND HYD LINE LEAKING.  LT WLG EXT ACT LINE REMOVED AND REPLACED.  LEAK CHECK SATISFACTORY IAW AMM 32-32-01.

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