L-1011 Trainer Installation: Battery and Standby DC Power Transfer

L-1011 Trainer - Battery ON Indicator

The Lockheed L-1011 power system has a very high degree of redundancy and fail over capabilities. Looking at the L-1011 schematics and talking to people who flew and worked on the L-1011 all say that it was really hard loosing power on the L-1011 due to the very well designed AC and DC power distribution systems on-board.

First thing we did today was to connect the Battery ON/OFF switch on the S/O Console as well as the associated annunciator. Here is an excerpt from Delta's L-1011 Pilot Reference Manual explaining the Battery switch as well as the associated annunciator:

from: Delta Airlines L-1011 Pilot's Reference Manual p.Electrical.20

L-1011 Trainer - Battery Flow Indicator

There are also a number of Standby and Essential Bus Fault indicators. While we did not complete the build out for this system fully, we have as of today implemented the DC power fail over systems. Below is a short video illustrating how the DC fail over systems work:

from Delta Airline L-1011 Pilot's Reference Manual page.Electrical-16

L-1011 Trainer - BUS 3 Failure and Essential AC Failure