What was found
DURING CRUISE, LOST NR 1 HYDRAULIC SYSTEM. DUMPED 20,000 LBS OF FUEL. RETURNED TO MSP AND LANDING WAS UNEVENTFUL. MAINTENANCE REMOVED AND REPLACED NR 1 EDP AND A CRACKED PRESSURE LINE. LEAK AND PRESSURE CHECKS OK.
- Difficulty date
- May 15, 2008
- Submitted
- May 19, 2008
- Operation
- Air carrier
- Aircraft
- N662US
- Make and model
- Boeing 747451
- Aircraft serial
- 23720
- Aircraft time
- 80,498 hours, 10,328 cycles
- System (JASC)
- 2910 · Hydraulic System, Main
- Part
- Line
- Condition
- Cracked
- Location
- Hyd System
- Stage of operation
- CR
- How discovered
- O
- Nature of condition
- K, J
- Precautionary procedure
- J, A
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.