Service difficulty report · Line · Boeing 747422

Difficulty date
June 20, 2000
Submitted
October 4, 2000
Operation
Air carrier
Aircraft
N183UA
Make and model
Boeing 747422
Aircraft serial
25379
Aircraft time
39,844 hours, 4,784 cycles
Engine
Pwa PW4056
Part
Line
Part number
272U4200103
Condition
Leaking
Location
Hydraulic System
Part time
39,844 hours
Stage of operation
UK
How discovered
O
Nature of condition
B, K, J
Precautionary procedure
O

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

What was found

STRONG HYDRAULIC SMELL IN THE COCKPIT. *S/D* SMELL DUE TO HYDRAULIC LEAK OF HYD SYSTEM NR 1 TUBE LOCATED IN FWD PIT AT AFT SIDE OF STA 900, STRINGER 28L. PIN HOLE DEVELOPED DUE TO CHAFING UNDER CLAMP. ACCOMPLISHED TUBE RINGLOCK REPAIR. LEAK CHECK ACCOMPLISHED ON REPAIR AREA, NO LEAKS. AIRCRAFT RETURNED TO SERVICE.