1.43 Stopped in Tunnels
A. Engine or Train Stopped in Tunnels
When an engine is stopped in a tunnel and cannot move promptly, crew members must:
1. Shut down diesel engine at once.
2. Shut down Waukesha or similar type engines.
3. Make a full service brake application.
4. Apply hand brakes to prevent movement in case the air brakes leak off.

b. Passenger Train Stopped in Tunnel or Deep Snow.

Crew members of a passenger train stopped in tunnel or deep snow must:

1. Shut off any circulating systems including:
A. Air Conditioning.
B. Ice Machines.
C. Generators.

2. Shut air intake shutters.

3. Turn off blower fans.

C. Notification if Stopped in Tunnel or Deep Snow.

The train dispatcher should be notified immediately so that proper arrangements can be made to protect persons and equipment.

D. When These Requirements Will Not Apply

These requirements will not apply if air currents carry the exhaust gases away from the train. Safety of passengers and crew members must be the first consideration.