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Allow sufficient time for tank pressurization (approximately 10 minutes for a half full 230-gallon tank).
During transfer, periodically verify that
AUXILIARY FUEL MANAGEMENT
panel quantity is decreasing at a minimum of 40 pounds per minute, per tank pair. Fuel transfer rate of less than 40 pounds per minute may indicate reduced .ow from one or both tanks.
1.  
AIR SOURCE HEAT/START switch -ENG.

2.  
FUEL BOOST PUMP CONTROL switches -ON.

3.  
PRESS OUTBD switch -ON.

4.  
MODE switch -AUTO.

5.  
TANKS switch -OUTBD.

 

4.10.7.2 External Extended Range Fuel Transfer In MANUAL Mode.
If AUTO mode is inoperative, transfer in MANUAL mode as follows:

Monitor fuel transfer to remain within CG limits and avoid asymmetric loading.
1.  
AIR SOURCE HEAT/START switch -ENG.

2.  
FUEL BOOST PUMP CONTROL switches -ON.

3.  
PRESS OUTBD switch -ON.

4.  
MODE switch -MANUAL.

5.  
TANKS switch -OUTBD.

 

4-44 Change 3
6.  MANUAL XFR switches RIGHT and LEFT -ON.

4.10.7.3 External Extended Range Fuel Flow Veri-.cation In Manual Mode. If extended range without landing is required and the aircraft is not equipped with an ERFS fuel indicating system, verify fuel .ow from each tank as follows:
NOTE
Ensure main fuel tanks are not completely full.
1.  
AIR SOURCE HEAT/START switch -ENG.

2.  
FUEL BOOST PUMP CONTROL switches -ON.

3.  
PRESS OUTBD switch -ON.

4.  
MODE switch -MANUAL.

5.  
TANKS switch -OUTBD.

6.  
MANUAL XFR RIGHT switch -ON. Note the rate of decrease of the AUX FUEL QTY POUNDS indicator. The normal transfer fuel .ow rate per tank should be between 20 to 38 pounds per minute.

7.  
MANUAL XFR RIGHT switch -OFF.

8.
Repeat steps 6. and 7. for left tank.

Change 3 4-44.1/(4-44.2 Blank)

AA0664
SA

Figure 4-19. Stores Jettison Control Panel

4.11 EXTERNAL STORES SUPPORT SYSTEM (ESSS).

ESSS provides a means of carrying a variety of external stores, including external extended range fuel tanks. The ESSS consists of .xed and removable provisions.
4.11.1 External Stores Fixed Provisions. Fixed pro-visions are: upper fuselage .xed .ttings for attaching the horizontal stores support (HSS) subsystem, and lower fuse-lage strut support .ttings for attaching two struts for each HSS. In addition to exterior components, .xed provisions are: interior helicopter provisions, including electrical har-nesses, fuel lines, bleed-air lines, and circuit breakers.
4.11.2 External Stores Removable Provisions. The external stores removable subsystem extends horizontally from each side of the helicopter at station 301.5, buttline
42.0. Extending below each horizontal stores support (HSS) are two vertical stores pylons (VSP) and attaching ejector racks. The racks are used to attach fuel tanks or other ex-ternal stores dispensers.
4.11.3 ESSS Side Position Lights. A position light is on each outboard end of HSS. Those lights use the power source provided to operate the standard installed position lights, colors are the same. Upon installation of the HSS, the electrical connectors connected to the jumper plugs, providing power for the standard position lights, are re-moved and reconnected to the connectors from the HSS position lights. Operation and power source for the ESSS position lights are the same as for the standard installed position lights.
4.11.4 External Stores Jettison Control Panel. The jettison control panel (Figure 4-19) provides the capability
TM 1-1520-253-10
of phase jettison of all external stores or symmetrical jetti-son of fuel tanks. Interlock circuitry prevents jettison of fuel tanks other than in pairs. Emergency jettison is com-pletely independent of the primary jettison subsystem.
　
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