Service difficulty report · Line · Boeing 75728A

Difficulty date
December 3, 1999
Submitted
January 19, 2001
Operation
Air carrier
Make and model
Boeing 75728A
Aircraft time
35,819 hours
Engine
Rroyce RB211535E437
Part
Line
Part number
312N510146
Condition
Loose
Location
Hyd System
Component
Pump Assembly · Vickers · 3508807
Stage of operation
CR
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

(CAN) DURING CRUISE LH HYD QTY DECREASED TO ZERO QTY PRESSURE LIGHT ON AND SYS DEACTIVATED. FOUND PRESSURE LINE JUST BEFORE FILTER MODULE AND BRACKET BROKEN. LINE TIGHTENED. PUMP SEIZED AND REPLACED. UNDER INVESTIGATION. PMUP WENT DRY AND THEN FAILED, UNIT FROZE DUE TO METAL CONTAMINATION, DAMAGED PACKINGS AND BACKUP SEALS.

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