Instruction Manual

Page 7-42 G1000 / GFC 700 System Maintenance Manual - 200/B200 Series King Air
Revision 8 190-00915-01
7.22 Weight on Wheels and Low Speed Awareness Band Check
This procedure will verify that the GDU air ground status uses valid Weight on Wheels (WOW) inputs.
1. Ensure aircraft is positioned with weight on wheels.
2. Apply external power to the aircraft. Set BATT and AVIONICS MASTER switches to ON and wait
for all aircraft and avionics systems to complete their initialization and begin operating normally.
3. Verify there are no WOW INVALID or WOW FAULT messages. Refer to Section 5.3 to
troubleshoot messages.
4. Verify the Low Speed Awareness band (red band) is NOT displayed on the PFD1 and PFD2 airspeed
tapes (see Figure 7-8.)
NOTE
This portion of the check can be accomplished in conjunction with the Landing Gear
Aural Alert and XM Audio Suppression Test in Section 7.2.2.
5. Place the airplane on jacks (Ref. King Air 200 Series Maintenance Manual Chapter 7-00-00) with the
wheels clear of the ground.
6. Verify there are no WOW INVALID or WOW FAULT messages. Refer to Section 5.3 to
troubleshoot messages.
7. Verify the Low Speed Awareness band (red band) appears at the low end of the Air Speed Tape on
the PFD1 and PFD2 (see Figure 7-8.)
8. Remove airplane from jacks.
If no other service is to be performed, continue to the return-to-service checks in Section 8.
Figure 7-8, Low Speed Awareness Band Symbolization