BMS F-16C/D 4.34, Flight Manual

Page: 197 / 234

T.O. BMS1F-16CM-1 BMS 4.34 Change 2.00
BMS 4.34 Dash 1
© Red Dog 2012-2019
Page: 197
3.4. FAULT ANALYSIS
All faults sent to the FCC are reported via the maintenance fault list (MFL) and accessed via the TEST
page on the MFD. All MFL faults are recorded on the DTC file for access and review after the flight.
Two fault reporting schemes are used. The maintenance fault list (MFL) contains the detailed
information for all reported faults,
while the pilot’s fault list (PFL) contains the same information only for
those faults that would be of interest to the pilot. The PFL is a subset of the MFL.
Faults that requ
ire pilot action or reduce mission capabilities are reported on the pilot’s fault list (PFL)
and displayed on the pilot’s fault list display (PFLD). The MASTER CAUTION light and avionics fault,
engine fault and FLCS fault caution panel lights illuminate to indicate pilot faults. The faults are
automatically displayed on the PFLD. See 3.4.2 PFLD analysis.
The MFL often helps isolate faults to a specific subsystem, which might not be necessary during the
flight but used by maintenance afterwards. In our case, it might be used for reviewing the faults that
occurred during a flight to help determine if pilot actions were appropriate.
3.4.1. Maintenance Fault List (MFL)
The Maintenance Fault List is accessed from the MFD TEST page (See 1.4.4)
MFL displays a maximum of 17 faults with the following format:
FAULTY subsystem - TEST number - Number of occurrences (up to 9) - Time of first occurrence.
MC04
326 1 1:37
The first column (PFL message) identifies the
subsystem in which the fault occurred.
The second column is a test number identifying
the specific subsystem that failed.
The third column states the number of times the
failure occurred since FCC power-up. The
maximum times recordable for one failure is nine.
The last column is a time of first occurrence of the
fault since FCC power-up. Up to 17 entries can be
displayed on the MFL. Included in those 17 are
two events: the takeoff and the landing. The
logging of these two events segments the entries
into three significant parts of the mission.
If more than 17 malfunctions including takeoff and
landing occur, the last one is always replaced with
new.
All faults are remembered by the DTC (see later
DTC Faults recording part). A takeoff (TOF) flag is
entered when airspeed reaches 120 kts and the gear is up. A landing (LAND) flag is recorded when
gear is down and airspeed is less than 80 kts.