The cab signal apparatus will be considered failed if any of the following conditions occur:
1. The audible indicator fails to sound when the cab signal changes to a more restrictive aspect.
2. The audible indicator continues to sound even though the cab signal change was acknowledged and the speed of the train was reduced to the speed required by the cab signal indication.
3. The cab signal fails to conform to two (2) fixed signal locations in succession.
4. Damage or fault occurs to any part of the cab signal apparatus.
5. When approaching a fixed signal displaying Approach or more favorable aspect in CSS territory without fixed automatic block signals, the cab signal displays Restricting and fails to conform after passing the fixed signal.
6. When approaching
a fixed signal displaying Stop and Proceed, Restricting, or Stop Signal,
and the cab signal displays an aspect more favorable than Approach.
EXCEPTION: This
procedure does not apply when the fixed signal being approached is imperfectly
displayed.
EXPLANATION:
Rule 555 lists
the conditions that determine a cab signal failure has occurred.
Once concluding that a cab signal failure has taken place enroute, the failing equipment will be governed by Rule 554. Remember, under no circumstances may the failing equipment be operated with cab signal indication (even if the Engineer later sees cab signal conformity with fixed signal indication), until the engine has been repaired, tested again, and found to be functioning as intended.
Rule Review
Rule 555, Criteria for determining cab signal apparatus failure:
The cab signals will be considered as having failed when:
1. The audible indicator fails to sound
when the cab signal changes to a more restrictive aspect.
2. The audible indicator continues to
sound after a cab signal change has been acknowledged and acted upon.
3. The cab signal fails to conform at
two (2) fixed signals in succession.
4. All the above.
If a cab signal displaying "restricting" fails to conform to a fixed signal of "approach" or better or damage occurs to any part of the cab signal apparatus:
1. The engineer must panic.
2. The cab signal apparatus has failed.
3. The train must be stopped.
4. The train must be reduced to restricted
speed.
When approaching a fixed signal displaying approach or better in CSS territory without fixed automatic signals, the cab signal displays Restricting and fails to conform after passing the fixed signal:
1. The engineer will become confused.
2. The engineer must consider the cab
signals failed.
3. The engineer must consider the wisdom
of eliminating wayside signals.
4. The engineer will take his pension.
When approaching a fixed signal displaying stop and proceed, Restricting, or a Stop Signal and the cab signal displays an aspect more favorable than approach:
1. The engineer must immediately stop the
train and not move until the cab signals are repaired.
2. The engineer must curse the mechanical
department.
3. The engineer must call the conductor
up to the cab to witness the crash.
4. The engineer must consider the cab
signals failed.
The criteria for determining a failed cab signal do not apply:
1. When the engineer is asleep.
2. The engineer passes the signal and
doesn't comply.
3. No management is on board the train.
4. The fixed signal is imperfectly displayed.