Service difficulty report · Selector Valve · Boeing 757232

Difficulty date
November 27, 2006
Submitted
December 7, 2006
Operation
Air carrier
Aircraft
N637DL
Make and model
Boeing 757232
Aircraft serial
23760
Aircraft time
62,633 hours, 29,596 cycles
Part
Selector Valve
Part number
273N30027
Part serial
MX636505
Condition
Bypassing
Location
Lt Hyd System
Stage of operation
AP
How discovered
O
Nature of condition
G
Precautionary procedure
O

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

What was found

MULTIPLE LEFT HYDRAULIC SYSTEM MALFUNCTIONS. NOSE GEAR NOT EXTENDING IN NORMAL MODE. ALT OK. LEFT HYDRAULIC SYSTEM OVERHEAT INDICATION ALSO. FOUND LANDING GEAR SELECTOR VLV BYPASSING. ALSO, ACMP AND EDPCASE RETURN FILTERS WITH DEBRIS. REPLACED ACMP, EDP AND ALL ASSOCIATED FILTERS.