CSP−HMI−2
MD Helicopters, Inc
.
MAINTENANCE MANUAL
Page 202
Revision 39
28−00−60
(3). The standard helicopter fuel system
only has an engine driven self priming
pump that will fill the fuel system when
the engine is motored with the starter.
Motor engine per the appropriate Pilot’s
Flight Manual.
(4). Bleed air out of helicopter engine fuel
controls per Rolls−Royce Engine
Operation and Maintenance Manual.
(5). If fuel system fails to bleed properly,
proceed as follows:
(a). Field fabricate a primer bulb assem-
(b). Disconnect fuel line between CEFA
and HMU at HMU side.
(c). Disconnect fuel line from fuel nozzle.
(d). Install primer bulb assembly in line
between HMU GEAR INLET and the
CEFA.
(e). Open fuel shutoff valve.
(f). Open throttle to ground idle position.
(g). Squeeze primer bulb until fuel comes
out of fuel line.
NOTE:
When reinstalling fuel lines, refer to ap-
propriate Rolls−Royce Operation and Main-
tenance Manual for proper torques.
(h). Remove primer bulb assembly from
fuel line and reconnect fuel line to
HMU.
(i). Crank engine for approximately 15
seconds to verify fuel to fuel nozzle is
free of air in the system.
(j). Repeat above procedure as required.
(k). Reinstall fuel line to fuel nozzle.
(l). Close throttle.
(m). Close fuel shutoff valve.
6G28−076
CLAMPS
AN807−8 ADAPTER
BULB PRIMER 5/16
SEASIDE #73800
AN818−8 NUT
TYGON−TYPE TUBING
(FUEL RESISTANT)
FUEL SYSTEM BLEEDING TOOL
(FIELD FABRICATE)
Figure 201. Field Fabricated Fuel System Bleeding Tool
