TM 10-5411-232-13&P CARGO BED COVER  (CBC) M105A2 TRAILER, TYPE II 0002 00 EQUIPMENT DESCRIPTION LOCATION AND DESCRIPTION OF MAJOR COMPONENTS. The major components of the CBC are identified in Figure 1, and described in the following paragraphs. Upper and Lower Door Assemblies - Two separate door assemblies, upper and lower, are located on the aft end of the CBC.  The doors can be interlocked with each other by engaging the handle of the upper door.  This then allows both doors to be closed and opened together at the same time.  The lower door can be separately locked in place by operating the latch on the inside.  Note that the upper door must be open to accomplish this.  An override of the latch allows the doors to be opened from the inside in case of emergency.    2-Way Ventilator - A 2-way ventilator is located on road side and curb side of the CBC towards the forward end.  The ventilators are operated from the inside.   Folding Step - There are two folding steps located on the aft (external) end of the CBC.  The steps are spring-loaded and extend and retract when operated by hand.  The steps provide access for climbing on top of the CBC.  Under normal conditions, the steps are retracted. Ladder - The ladder is a 24” folding step ladder located inside the CBC.  It is secured with an adjustable ratchet strap assembly that is molded on the CBC. Chest Handle - Two chest handles are provided on top of the CBC near the aft left side.  They are used for gripping when climbing on top of the CBC by using the folding steps.    Access Plate - The two access plates, one on each side of the CBC, are round covers that are screwed onto the cable boots attached to the CBC.  When loosened, the access plate is supported by a lanyard which is bolted from inside onto the CBC.  When the access cover is open, electrical or signal cables can be pushed through the cable boot opening for equipment used inside the CBC. Door Lock - The door lock can be operated from outside or inside the CBC even if the doors are locked from outside.  This is an override feature.  In addition, the upper door can be latched with the lower door to provide a single function operation. 0002 00-2