PAFAM
Maintenance Manual Ref: ATA22-41
Performance And Failure Assesment Monitor. Duplicated ILS, Rad Alt, Pitch Computer, Roll Computer, & Yaw Rate Gyro, INS (thru AMSU), CSU-1, Linear Accelorometer, Ground Spoiler Control Unit, Numerous VALID's, CADC & Flying Control position inputs to the PAFAM computer. The PAFAM also has reversion inhibits for all A/P & Yaw computers.
The PAFAM drives a display electronics unit which in turn drives
Capt's & F/O's CRT displays with adjustable dim/bright mounted below glareshield. The display shows a trapezoid (runway profile as viewed on approach) and displays PAFAM's computed moving cross for 'Runway & predicted place of touchdown'.
Sorry if I got a bit over-Techy. PAFAM was disabled on our a/c.
One of our old skipper's used it (way back when) and wasn't too impressed. Not sure if that was a majority crew opinion or just him!
Regards
BAe146???
Ex-DC-10 Certifying Technician