L-1011 Trainer Installation: Oil Quantity and Datalink Display Power-Up

L-1011 Trainer - Oil Quantity Instrument Power-Up

Powered up some additional engine components on the FE station today and worked on the 400Hz power feed to the main instrument panel. In the image above you see the engine number 2 and engine number 3 oil quantity indicators perform the built in self test (BITE). 

From. Delta L-1011 Pilot's Reference.

The Data Link panel only initialized to a test screen and a configuration screen that allows for the brightness adjustment of the display. Until the display will be fed ARINC 429 data via the V1 Avionics SIM42911 interface there will not be much other data on the display. However, it is now powered from the 400Hz power source and will be ready for action as soon as we start setting up the computers.

L-1011 Trainer - Data Link Display

L-1011 Trainer - Data Link Power-Up

Avionics Bending: Engine Oil Quantity Indicator

L-1011 Engine Oil Quantity

The Engine Oil Quantity used on the Lockheed L-1011 is a General Electric 8DJ173 LWD1 and is a relatively simple instrument. It takes 115V 400Hz power. The instrument has a BITE test button on the lower left front. The test switch drives the indicator needle to 10.5 Quart. You can see operation of the instrument in the short demonstration video below.

On the real aircraft the instrument acts as the power source for the oil quantity probe. The instrument outputs 6.5VDC which can then be run through a digital 10K potentiometer to simulate the oil level probe. 

Below is the schematic and pinout for the Instrument from the L-1011 Training manual:

Engine Oil Quantity - Pinout and Schematic