Service difficulty report · Pump · Boeing 747251B

Difficulty date
June 26, 2007
Submitted
June 28, 2007
Operation
Air carrier
Aircraft
N631NW
Make and model
Boeing 747251B
Aircraft serial
23111
Aircraft time
85,687 hours, 12,857 cycles
Part
Pump
Condition
Failed
Location
Nr 1 Hyd System
Stage of operation
CL
How discovered
O
Nature of condition
K, J
Precautionary procedure
H

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

AFTER TAKEOFF NR 1 HYDRAULIC QUANTITY WENT TO ZERO. FLIGHT CONTINUED ON TO ANC AND LANDING WAS UNEVENTFUL. MAINTENANCE REMOVED AND REPLACED ENGINE DRIVEN PUMP (EDP) AND AIR DRIVEN PUMP FLEX HOSE. OPERATIONAL CHECKED GOOD AND AIRCRAFT RETURNED TO SERVICE.