SDR ASAA2016040616267

Service difficulty report · Resolver · Boeing 737890

Difficulty date: April 6, 2016
Submitted: April 11, 2016
Operation: Air carrier
Aircraft: N581AS
Make and model: Boeing 737890
Aircraft serial: 35188
Aircraft time: 34,362 hours, 10,400 cycles
System (JASC): 4960 · APU Controls
Part: Resolver
Condition: Failed
Stage of operation: CR
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

CSS FAIL MSG RECEIVED. ACFT GROUNDED. APU MAINTENANCE HISTORY HAS FAULT CODE 49031175, FCU RESOLVER CIRCUIT SHOWS BAD, LOGGED 18 TIMES IN THE LAST 20 STARTS. OLDEST BEING 158 STARTS AGO STARTING ON MAR 09, 2016. FAULT HISTORY, MAINT MESSAGE 49-31016, OVERTEMPERATURE SHUTDOWN, 6 STARTS OLD. CURRENT STATUS, NO FAILURES FOUND.