EGPWS LINE MAINTENANCE MANUAL
3.6 LEVEL 4 SELF-TEST - FAULT HISTORY
Level 4
If any faults were recorded in the last ten flight legs then voice sequence as described in the following table will be enunciated. Otherwise, the message “NO FAULTS” will be enunciated.
During Level 4
During Level 4
TABLE
THE FOLLOWING INFORMATION IS GIVEN IN THE LEVEL 4
1.Enunciate 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.Enunciate any internal faults stored for leg X
3.Enunciate any external faults stored for leg X
4.Increment to next oldest leg with faults (if any) and repeat the above sequence
5.Test proceeds to the next flight leg that contains a fault.
For Example:
If a fault occurred within the previous 10 flight legs the aural messages enunciated will be the same as given in Level 2 with the added information of which flight leg the fault occurred. For example, if radio altimeter bus 1 failed 4 flights earlier the messages would be:
“FLIGHT 4” “EGPWC OK”
“EXTERNAL FAULTS”
“RADIO ALTIMETER BUS 1 INACTIVE” “PRESS TO CONTINUE’
Note that flight 1 is the most recent flight.
CAGE CODE: 97896 | SCALE: NONE SIZE: A DWG NO.: | REV: G | SHEET 36 of 68 |