Page 2-31
Pilot’s Operating Manual
Revision A2: Nov, 2004
Sub-section 2
GROUND SERVICING
Hawker 800XP Pro Line 21
Section VI - GROUND OPERATIONS
Gravity Refueling Ventral Tank
Preparation for Gravity Refueling Ventral Tank
Specific preparations are provided below for airplanes which have Service Bulletin SB 24-3641
incorporated or do not have Service Bulletin SB 24-3641 incorporated:
I. Airplane Serial No. 258670 and subsequent, or airplanes with Raytheon Aircraft Company
Service Bulletin SB 24-3641 incorporated and gravity refueling ventral tank with the
airplane batteries only:
II. Airplanes prior to Serial No. 258670 which do not have Raytheon Aircraft Company
Service Bulletin SB 24-3641 incorporated and gravity refueling ventral tank with the
airplane batteries only:
III. All airplanes gravity refueling ventral tank when external power or the APU is available:
Depending on the configuration of the airplane, refer to the appropriate steps under I, II, or III to prepare
for Gravity Refueling Ventral Tank:
I. Airplane Serial No. 258670 and subsequent, or airplanes with Raytheon Aircraft Company Service
Bulletin SB 24-3641 incorporated and gravity refuel ventral tank with the airplane batteries only:
NOTE: If the ventral tank is to be used in flight it must be full and each wing must contain
more than 3450 lb (1565 kg) of fuel.
After the ventral tank has been refueled to full and after the 28 VDC has been de-
energized and energized, the CDU indication may present a crosshatch indication
due to settling. To confirm the ventral tank is full, a small amount of fuel can be
transferred into the ventral tank.
CAUTION:
INVESTIGATE ANY CONTAMINATION, OTHER THAN WATER, IN THE FOLLOWING
DRAINED SAMPLE.
(1) Drain all water from the ventral tank using the water drain.
WARNING:
APU (if installed) MUST NOT BE RUNNING.
(2) Comply with local refueling safety precautions.
(3) On the refuel control panel, select the POWER switch ON (Figure 6).
NOTE: A sonalert will sound and the overhead panel REFUEL ON annunciator will
illuminate when the POWER switch is selected ON. The sonalert will stop
when the MASTER switch is selected ON.
Engine/Fuel data page will automatically be displayed on the pilot’s CDU.
(4) Refer forward to Gravity Refueling Ventral Tank Procedure and continue with steps
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