# SDR 2005UALA00835

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 15, 2005
- Submitted: August 23, 2005
- Operation: Air carrier
- Aircraft: N196UA
- Make and model: Boeing 747422
- Aircraft serial: 28715
- Aircraft time: 33,726 hours, 4,260 cycles
- Engine: Pwa PW4056
- System (JASC): [2910 · Hydraulic System, Main](https://openairdocs.org/jasc/2910)
- Part: Hydraulic System
- Condition: Malfunctioned
- Location: Nr 4
- Stage of operation: CL
- How discovered: 9
- Nature of condition: K, J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2005UALA00835

## Discrepancy

RETURNED TO SFO UNDER AMBER ALERT DUE TO NR 4 HYDRAULIC SYSTEM PROBLEM .

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