Service difficulty report · Bypass Valve · Boeing 727225

Difficulty date
October 24, 2008
Submitted
April 6, 2009
Operation
Air carrier
Aircraft
N464FE
Make and model
Boeing 727225
Aircraft serial
21288
Aircraft time
52,885 hours, 37,731 cycles
Part
Bypass Valve
Part number
AV13J5144
Part serial
J06397
Condition
Leaking
Location
Hyd System
Part time
9,284 hours, 8,061 cycles
Stage of operation
DE
How discovered
O
Nature of condition
K
Precautionary procedure
O

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

What was found

DURING DESCENT A HYDRAULIC SYSTEM LOST ALL QTY. COMPLIED WITH QRH LOSS OF ALL HYDRAULIC SYSTEM A ALT FLAPS AND MANUAL GEAR EXT SYST A ENG 1 AND 2 FLAP SHUTOFF SWITCHES CLOSED FOR MORE THAN 5 MIN WITH ENGINES RUNNING. REMOVED AND REPLACED RT FLAP BYPASS VALVE PER MM 27-51-151-4. ALSO, REPLACED A SYS CASE DRAIN FILTERS PER MM 29-11-041-2.