Technical data

Product Specification
HIF-2121/R5 CAGE CODE: 97896 SCALE: NONE SIZE: A DWG NO: 965-1176-601 REV: D SHEET 123
6.10.6.4 Level 4 Self-Test - Fault History
Level 4 self-test provides enunciation of the faults recorded over the last 10 flight legs. Level 4 self-test is initiated by
pressing the cockpit self-test button within 3 seconds of the end of level 3 self-test. The process is described in Figure 6.10.6-
6.
If any faults were recorded in the last ten legs then voice sequence as described in Table 6.10.6-2 will be annunciated.
Otherwise the message “NO FAULTS” will be annunciated.
During level 4 self-test, a Short Cancel bumps the to the next flight leg with faults (if any).
During level 4 self-test, a Long Cancel terminates the self-test level and “PRESS TO CONTINUE” is annunciated for
proceeding to level 5 self-test.
START
LEVEL 4
SHORT
CANCEL
LEVEL 4
COMPLETE
ANNUNCIATE
"PRESS TO
CONT"
Yes
No
SWITCH
PRESSED
WITHIN
3 SEC
No
Yes
LONG
CANCEL
No
SKIP TO NEXT
LEVEL 4 ITEM
Yes
ANNUNCIATE
"WARNING
HISTORY"
Yes
STOP SELF TEST
No
START
LEVEL 5
FIGURE 6.10.6-6: LEVEL 4 SELF-TEST
1. Annunciate the number of the most recent flight leg with faults as “FLIGHT X”, where “X” is a number
from 1 to 10 where 1 is the most recent flight leg
2. Annunciate any internal faults stored for leg X
3. Annunciate any external faults stored for leg X
4. Increment to next oldest leg with faults (if any) and repeat the above sequence
TABLE 6.10.6-2: LEVEL 4 SELF-TEST RESULTS