Service difficulty report · Relay · Boeing 777222

Difficulty date
September 30, 2013
Submitted
October 4, 2013
Operation
Air carrier
Aircraft
N229UA
Make and model
Boeing 777222
Aircraft serial
30557
Aircraft time
49,489 hours, 5,976 cycles
Engine
Pwa PW40903
Part
Relay
Condition
Faulty
Location
Nitrogen System
Stage of operation
NR
How discovered
O
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

THE NITROGEN GENERATING SYSTEM DETECTS A FAULT SUCH AS LOW SYSTEM FLOW RATES OR HIGH OR LOW TEMPERATURE CONTROL RESULTING IN DEGRADED PERFORMANCE. NITROGEN GENERATING SYSTEM SHUTS DOWN BUT WILL AUTOMATICALLY RESET ONCE ON THE GROUND. REPLACED NITROGEN GENERATING SYSTEM RAM AIR ACTUATOR RELAY IAW FIM TASK 47-31 825.