B737 first officer reported an electrical anomaly and APU malfunction that resulted in a normal land...

Attributes
ACN	1539026
Time
Date	201805
Local Time Of Day	1201-1800
Place
Locale Reference	ZZZ.ARTCC
State Reference	US
Environment
Flight Conditions	VMC
Aircraft 1
Make Model Name	B737 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	Descent
Flight Plan	IFR
Component
Aircraft Component	DC Rectifier
Person 1
Function	Pilot Flying First Officer
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 50 Flight Crew Total 9468 Flight Crew Type 1752
Events
Anomaly	Aircraft Equipment Problem Critical

Narrative:

In the descent [when] we saw what looked like an interruption in the electrical system followed by many annunciations illuminating indicating failures. The TR1 light was illuminated and we ran the checklist for that failure. We did start the APU but it would not come on line in the air or on the ground. The ground power would also not come on line on the ground. It appeared that we had lost at a minimum a bus. We landed safely.

Original NASA ASRS Text

Title: B737 First Officer reported an electrical anomaly and APU malfunction that resulted in a normal landing.

Narrative: In the descent [when] we saw what looked like an interruption in the electrical system followed by many annunciations illuminating indicating failures. The TR1 light was illuminated and we ran the checklist for that failure. We did start the APU but it would not come on line in the air or on the ground. The ground power would also not come on line on the ground. It appeared that we had lost at a minimum a bus. We landed safely.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.

B737 first officer reported an electrical anomaly and APU malfunction that resulted in a normal landing.