# SDR 0600186716

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 20, 2006
- Submitted: January 23, 2006
- Operation: Air carrier
- Aircraft: N616US
- Make and model: Boeing 747251F
- Aircraft serial: 21120
- Aircraft time: 100,838 hours, 24,774 cycles
- System (JASC): [2720 · Rudder Control System](https://openairdocs.org/jasc/2720)
- Part: Actuator
- Part number: 382200021
- Part serial: 906
- Condition: Failed
- Location: Rudder
- Stage of operation: CL
- How discovered: O
- Nature of condition: K, J
- Precautionary procedure: J, A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/0600186716

## Discrepancy

AFTER TAKEOFF NR 3 HYDRAULIC SYSTEM QUANTITY WENT TO NEAR ZERO.  AIRCRAFT DUMPED 150,000 LBS OF FUEL AND RETURNED TO ANC, AND LANDED WITHOUT INCIDENT.  ANC MAINTENANCE REMOVED AND REPLACED RUDDER ACTUATOR, AND NR 3 ENG HYDRAULIC PUMP.  OPERATIONAL CHECKED OK, AIRCRAFT RETURNED TO SERVICE.

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