SDR AALA202007209015

Service difficulty report · Inverter · Boeing 737823

Difficulty date: July 18, 2020
Submitted: July 22, 2020
Operation: Air carrier
Aircraft: N940NN
Make and model: Boeing 737823
Aircraft serial: 33323
Aircraft time: 20,794 hours, 7,971 cycles
System (JASC): 2422 · AC Inverter
Part: Inverter
Condition: Defective
Location: Battery
Stage of operation: CL
How discovered: O
Nature of condition: J
Precautionary procedure: A

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

What was found

AIRCRAFT WAS GROUNDED: PASSING 13,500 BAT DISCHARGE LIGHT ILLUMINATED . AN EMERGENCY WAS DECLARED AND THE AIRCRAFT RETURNED TO ORF WHERE IT LANDED SAFELY WITHOUT FURTHER INCIDENT.REPLACED BATTERY CHARGER PER AMM 24-31-21,REPLACED STATIC INVERTER PER AMM 24-34-21,(AALA202007209015) REPLACED BATTERY PER AMM 24-31-11, AND REPLACED STANDBY POWER CONTOL UNIT(SPCU) PER AMM 24-34-11. A SATISFACTORY OPERATIONAL CHECK OF ALL REPLACED ITEMS WAS ACCOMPLISHED.