Service difficulty report · Wire · Boeing 777222

Difficulty date
August 22, 2010
Submitted
August 23, 2010
Operation
Air carrier
Aircraft
N773UA
Make and model
Boeing 777222
Aircraft serial
26929
Aircraft time
61,320 hours, 12,113 cycles
Engine
Pwa PW4077
Part
Wire
Part number
W5413100118
Condition
Damaged
Location
Sequence Valve
Component
Sequence Valve
Component part number
3910032104
Stage of operation
NR
How discovered
9
Nature of condition
O
Precautionary procedure
O

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

What was found

NLG DOORS WILL NOT CLOSE. REPLACED NLG DOOR SAFETY VALVE, NO HELP. REPLACED NLG DOOR SEAL BYPASS VALVE, NO HELP. REPLACED NLG. OPERATED SEQUENCE VALVE, NO HELP. REPLACED NLG DOOR ACT, NO HELP. REPLACED 2ND NLG SAFETY VALVE, NO HELP. ALSO REPLACED PRESSURE SWITCH. FOUND WIRE AT D2205J PIN 17, W5413-1001-18 CORRODED APPROX 1 INCH FROM CONNECTOR, FOUND PROBLEM USING TEST LIGHT AS LOAD. REPINED NR17 OF D2205J AND REPAIRED WIRE. ACCOMPLISHED INSTALLATION TESTS FOR R & R VALVES. DOOR OP CHECKED NORMAL. NO LEAKS NOTED.