Service difficulty report · Control Valve · Boeing 737890

Difficulty date
January 24, 2012
Submitted
January 26, 2012
Operation
Air carrier
Aircraft
N594AS
Make and model
Boeing 737890
Aircraft serial
35191
Aircraft time
14,695 hours, 4,595 cycles
Part
Control Valve
Part number
3989083
Part serial
2078
Condition
Malfunctioned
Location
Ac Bay
Part time
57,797 hours, 27,842 cycles
Stage of operation
CL
How discovered
O
Nature of condition
J
Precautionary procedure
K

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

What was found

PASSING APPROXIMATELY 2000FT AFTER TAKEOFF AT ANC THE RIGHT PACK LIGHT ILLUMINATED THE PACK QRH CHECKLIST WAS ACCOMPLISHED THE PACK LIGHT EXTINGUISHED WHEN THE MASTER CAUTION SYSTEM WAS RESET. PERFORMED BITE CHECK OF BOX FOUND RIGHT TCU FAULT LIGHT ILLUMINATED REF FIM 21 62 TASK 801. REPLACED RT PACK TEMP CONTROL VALVE. REF MM 21 51 10 000 801 AND 21 51 10 400 801. BITE TEST TASK 21 61 00 700 806 008. CONFIRMED NO FAULTS. AIRCRAFT OK FOR CONTINUED SERVICE.