Service difficulty report · Bypass Valve · Boeing 757222

Difficulty date
July 22, 2010
Submitted
July 23, 2010
Operation
Air carrier
Aircraft
N552UA
Make and model
Boeing 757222
Aircraft serial
26641
Aircraft time
70,684 hours, 20,339 cycles
Engine
Pwa PW2037
Part
Bypass Valve
Part number
340545
Part serial
5573
Condition
Failed
Location
Le Slat
Stage of operation
NR
How discovered
O
Nature of condition
J
Precautionary procedure
O

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

What was found

L/E SLATS INOP IN ALTERNATE, L/E SLATS DISAGREE EICAS MESSAGE. TROUBLESHOT SYSTEM PER MM. NEEDS BYPASS VALVE V10059. VALVE REPLACED. ACP OP TEST PER MM, CHECKS OKAY. ACP'D OP TEST OF FLAP SLAT. ALT DRIVE SYS PER JIC, OP CHECK OKAY.