Service difficulty report · Hose · Boeing 747428

Difficulty date
March 25, 2018
Submitted
March 28, 2018
Operation
Air carrier
Aircraft
N952CA
Make and model
Boeing 747428
Aircraft serial
25238
Aircraft time
94,813 hours, 14,165 cycles
Engine
Ge CF680C2B1F
Part
Hose
Part number
9741735
Condition
Leaking
Location
Hyd System
Part time
94,813 hours, 14,165 cycles
Stage of operation
AP
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

DURING DECENT TO APPROACH, THE NR 1 HYDRAULIC SYSTEM FAILED DUE TO FLUID LEAK. FOUND THE NR 1 HYDRAULIC SYSTEM AIR DRIVEN DEMAND HYDRAULIC PUMP PRESSURE HOSE LEAKING. REMOVED AND REPLACED THE HYDRUALIC PRESSURE HOSE IIAW MM 29-11-17, 29-11-23, AND 20-11-05. PERFORMED A SATISFACTORY OPS AND LEAK CHECK.