The Advanced Flight Management System (AFMS) for the B767 Tanker and P-8A are similar. The software design is derived from the Boeing 737 FMS with new hardware using a Power PC processor with a software partitioned operating environment.  The AFMS includes software partitions for Data Communication Management and Radio Management functions.
The system consists of two AFMS, up to six Multi-function Control Display Units (MCDU) and 6-10 Remote Interface Units (RIU).  The AFMS configuration offers more functionality with fewer boxes and the RIU reduces aircraft wiring.  Modular software design allows for upgrades to be done without removing the unit from the aircraft.  The system is LNAV and VNAV capability compliant and multi-sensor navigation compliant with RTCA DO-236A. 

FMS Hardware:

Flight Management Computer (AFMC)

• ¾ ATR short

• 8 slot VME64x chassis

• Weight 20 lbs

• Power 95 watts, 117 VAC, 400 Hz

• DO-160C environmental standard

Multipurpose Control Display Units

Remote Interface Unit (RIU)

• 70 channel

• ARINC 429 4 in 2 out

• 52 programmable inputs

• 23 programmable outputs