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NEWS | Dec. 3, 2021

Computers: Protecting the MFOCS PU

Installing Joint Battle Command-Platform (JBC-P) into new vehicle
Photo by Maj. Melodie Tafao
A number of Mounted Family of Computer Systems (MFOCS) processor units (PUs) have shown evidence of environmental damage. That means water, sand or other factors in the environment have damaged the PUs. Subject matter experts (SMEs) determined this damage was due, in part, to units failing to keep all MFOCS PU doors and caps to external interfaces closed and secured properly when not in use.
Read and heed the following guidance the SMEs put together to help fix this problem.
Items affected: Joint Capabilities Release (JCR)/Joint Battle Command-Platform (JBC-P) MFOCS PUs.

Issue: Damage from environmental exposure.

How to Resolve: Ensure that the RHDD bay door, GPS hold-up battery compartment (located on front of the PU, as shown in Fig 1 below), and all external interfaces (as shown in Fig 3), are capped and/or closed properly when not in use.

Be aware that the MFOCS PU removable hard disk drive cartridge (RHDDC) bay door should be opened for official and authorized use only.
MFOCS PU front view; RHDD bay door closed
Fig 1. MFOCS PU front view; RHDD bay door closed

MFOCS PU front view; RHDD Bay door open
Fig 2. MFOCS PU front view; RHDD Bay door open

MFOCS PU RHDDC bay door removal /replacement guidance
Fig 3. MFOCS PU RHDDC bay door removal /replacement guidance

MFOCS PU interfaces left (top image) and right (bottom image) sides of the PU
Fig 4. 
MFOCS PU interfaces left (top image) and right (bottom image) sides of the PU
If DEMIL is required, the DEMIL code for the MFOCS PU is “D,” meaning “USML or CCL military items—DEMIL required. Destroy item and components to prevent restoration or repair to a usable condition.

For full disposition instructions, refer to the Defense Logistics Agency’s Turn-In Guide, which is available at:
For answers to your questions, email John C. White or Thomas Carpentier at:
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