L-1011 Trainer Installation: EVAC Signal, FE Station Indicator Test

L1011 Trainer - FE Station Indicator Lights

Wow, today was a very productive day working on the Lockheed L-1011 trainer at the Museum. Today we completed the following work items:

1. Power up the indicator lights for the Fuel Jettison Panel 
2. Power up the indicator lights for the Engine Fuel Panel 
3. Powered the Brake Temperature gauge
4. Build and connected the Indicator Test Relay circuit for the FE Station
5. Installed and connected the L-1011 Evacuation Signal Panel
6. Jim installed some additional DIN rains into the overhead panel that will hold the future Interbus components

So lets start with the EVACUATION SIGNAL panel. The panel is used to initiate ground evacuation of the aircraft. The EVAC signal can be triggered from either the flight station (this is the panel we installed today) or from a Flight Attendant station (this will not be implemented in the simulator). The EVAC signal is pretty loud and would sounds from multiple stations throughout the aircraft.

L-1011 Trainer: Overhead Panel - Evacuation Signal

Below is a short video that shows the operation of the EVAC signal ad the "Horn Silence" momentary switch. You might want to turn your volume down a little on your computer before you play the video because the EVAC signal is pretty loud. By the way ... the signal is a 

Here is the schematic and pinout for the L-1011 Evacuation Signal panel:

L-1011 EVAC Panel Schematic from Delta L-1011 Training Manual

Besides the installation and power-up of the EVAC panel we also continued the indicator light buildout of the FE Station. Today we powered the Fuel Jettison panel indicators as well as the Engine Fuel panel indicators (see the two images below).

L-1011 Trainer: Fuel Jettison Indicator Lights

L-1011 Trainer: Engine Fuel Indicator Lights

The 5VDC instrument lighting buildout is also moving forward, while a bit slower due to the fact that we are waiting on additional 5VDC 20A as well as two 5VDC 40A power units to arrive. Below is the Brake Temperature indicator that we powered today. The indicator is a vertical tape instrument that shows two (left and right) selected brake assemblies at a time.

L-1011 Trainer: FE Station - Break Temperature Indicator

Lastly I build the indicator test circuit for the FE station. The test circuit turns on all indicator lights with a "TEST" switch on the FE Light Panel. The indicator test is implemented using a 24VDC relay.

L-1011 Trainer: FE Lights Indicator TEST Switch

The short video below show the operation of the FE Indicator Test circuit.

Avionics Bending: Evacuation Signal Panel - Pinout

The evacuation signal panel is located on the pilots overhead panel. It is coupled to a number of evacuation signal stations throughout the aircraft. If you have one of these and you power it up ... be forewarned, they are very loud.

The instrument is made by Pacific Electro Dynamics, Inc. in Bellevue, Washington and has a part number of 247-1. Below is the schematic for the panel that also shows the combination of the master panel (pictured above) an the panels distributed throughout the cabin:

Here is the summary of the pinout for the Emergency Evacuation Signaling Panel made by Pacific Electro Dynamics, Inc part number 247-1:

Connector	Pin	Function
Sort	Sort	Sort

J1	10	Command Switch Light (+24V)
J1	03	Command Switch Light (GND)
J1	06	Power Input 26VDC
J1	05	Remote Command Switch (A)
J1	04	Remote Command Switch (B)
J1	11	EVAC Light Test (GND)
J1	07	EVAC Light Test (+24V)
J1	01	Light Plate (+5V)
J1	02	Light Plate (GND)

Original Flight Hardware: Emergency Evacuation Singal Panel

The Lockheed L-1011 has several evacuation panels throughout the cabin. There is actually one at every station throughout the cabin. The one location in the flight station is part of the overhead panel. The switch elements can be described as follows:

• HORN CUTOUT ... this is a momentary push-button switch provided to silence the evacuation signal intermittent horn on its respective panel.
• EVACUATION LIGHT ... Flashes 90 times per minute when evacuation command switch is pushed IN.
• SPEAKER HORN ... Sounds intermittently 90 times per minute when the command switch is IN on any of the 10 evacuation signal panels. Horn is silenced with horn cutout switch.
• EVACUATION COMMAND SWITCH ... This is a guarded switch-light provided to activate the evacuation signal.

Panel Location