Appendix B: Troubleshooting Do's And Do Not's - Honeywell MK V Line Maintenance Manual

12 APPENDIX B: TROUBLESHOOTING DO'S AND DO NOT'S

DO use built-in self test levels to find the exact nature of the fault.
DO use our free WinVIEWS program to quickly access Self Test Level 1, 2, and 3 info
DO remember to look at the front panel LEDs
Green Computer OK LED means "don't remove"
Amber External Fault LED means "don't remove"
Red Computer means "possibly remove"
DO NOT use cockpit INOP lamps for troubleshooting
INOP indications are merely a pilot's indication of which EGPWS functions are inactive, they are not positive
indication of internal EGPWS faults. Experience shows External (non-EGPWS) faults are responsible for
INOPs illumination 99% of the time.
DO NOT remove unit if front panel green Computer OK LED is illuminated
CAGE CODE: 97896
EGPWS LINE MAINTENANCE MANUAL
SCALE: NONE SIZE: A DWG NO.: 060-4199-180 REV: G SHEET 61 of 68