Service difficulty report · Control Unit · Boeing 737990ER

Difficulty date
January 25, 2018
Submitted
January 26, 2018
Operation
Air carrier
Aircraft
N492AS
Make and model
Boeing 737990ER
Aircraft serial
44110
Aircraft time
8,577 hours, 2,924 cycles
Part
Control Unit
Part number
115195219
Part serial
115195251031
Condition
Failed
Location
Standby Power
Part time
8,795 hours, 2,899 cycles
Stage of operation
TX
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

WHILE TRANSFERRING BETWEEN APU AND EXT PWR BUSSES, ELEC ANNUNCIATOR ON P5-5 PANEL CAME ON. SPCU INOPERATIVE SHOWS, WILL NOT RESET. ACFT GROUNDED. REMOVED & REPLACED THE STANDBY POWER CONTROL UNIT IAW AMM 24-34-11. OPS NORMAL .