Page 2-16
Pilot’s Operating Manual
Revision A2: Nov, 2004
Sub-section 2
GROUND SERVICING
Hawker 800XP Pro Line 21
Section VI - GROUND OPERATIONS
POWER SUPPLIES
Refuel/defuel preferably with external power connected. If external power is not available, the airplane
batteries may be used but do not use other electrical equipment as a battery voltage reduction may
occur affecting indicator readings.
CAUTION:
DO NOT USE THE BATTERIES FOR LONGER THAN NECESSARY.
If RAC Service Bulletin SB 24-3641 has been incorporated, the fuel quantity can be monitored on the
pilot’s CDU following the selection of the refuel control panel POWER switch to ON. Selecting the
airplane batteries to ON (for these airplanes) is not required.
To Drain Water From The Wing Center Tanks, Use This Release Tool With The Extension Blade.
1. Insert the blade of the release tool in the slot of the drain valve spindle.
2. Turn the tool and valve counter-clockwise 1/4 turn and push up.
3. Continue to drain until the drains container appears to be full.
4. Release the pressure on the drain tool and allow the drain to move downwards to the closed
position.
5. Turn the drain tool and valve clockwise to lock the drain valve in position.
6. Check the sample and repeat the drain procedure if necessary.
NOTE: This tool may be used without the extension blade for draining the vent surge and ventral
tank.
Figure 8
Water Drain Tool