TM-9-2350-358-BD

HOWITZER, MEDIUM, SELF-PROPELLED, 155MM; M109A6

TECHNICAL MANUAL; OPERATOR’S, UNIT, AND DIRECT SUPPORT SUPPORT MAINTENANCE

MARCH 1994

TM-9-2350-358-BD - Page 293 of 343

TM 9-2350

-

358-BD

14-6.

MCS CIRCUIT BREAKERS DEFECTIVE

General Information:

nMCS circuit breakers provide protection for a malfunctioning electric circuit within the MCS system.

When a circuit

breaker becomes damaged it will open removing electrical power from the circuit.

The only BDAR fix is to bypass the

damaged circuit breaker.

For BDAR fix of a circuit breaker see Chapter 3, para 3-16 "Circuit Breakers Damaged".

14-7.

MCS M3 HEATER DEFECTIVE

General Information:

The M3 heater warms the air for each individual member of the crew keeping them comfortable and thereby maintaining a

high level of effectiveness and efficiency of the crew.

There is no BDAR action to return a defective heater to normal operation, however, since all heaters are identical they can

be relocated by moving from one station to another depending on critical needs and priorities.

14-8.

MCS AIR DUCT HOSES AND AIR PIPE PERFORATED

General Information:

Warmed, filtered, and conditioned air is ducted through the microclimate air pipe and air duct hoses to the crew members

at 5 separate locations in the vehicle.

Damaged air ducts allow air to escape preventing adequate air supply to all stations.

Limitations:

None

Personnel/Time Required:

•

1 soldier

•

0.1 to 0.5 hour

Materials/Tools:

•

Tape, duct (item 62, Appendix C)

•

Knife

References:

TM 9-2350-314-20-1-2

14-2