Hawker Beechcraft Hawker 800XP, Руководство по эксплуатации для пилотов

Страница: 93 / 923

Page 2-16
Pilot’s Operating Manual
Revision A1: Nov, 2002
Sub-section 2
ENGINES
Hawker 800XP Pro Line 21
Section III - SYSTEMS DESCRIPTION
ENGINE SYSTEMS and COMPONENTS
• ENGINE OIL
• IGNITION
• FUEL CONTROL
• POWER CONTROLS
ENGINE OIL (Figure 3)
Oil under pressure lubricates the engine bearings and the transfer, accessory and planetary gearboxes.
The system consists of:
(a) Oil Tank and Sight Gauge
(b) Oil Pump and Chip Detector
(c) Oil Filter and Bypass Valve
(d) Air/Oil Cooler and Bypass Valve
(e) Fuel to Oil Cooler
(f) Oil to Fuel Cooler
(g) Breather Pressurizing Valve
(h) Pressure and Temperature Transmitters and Indicators
Rotation of the engine-driven oil pump draws oil from the reservoir. Oil under pressure flows through a
pressure regulator, filter and temperature control components to the engine bearings, the transfer
gearbox, accessory gearbox and the front fan planetary gear assembly.
Oil Pump Assembly
An oil pump assembly is located on the accessory drive gearbox. It contains a single oil pressure pump
and four scavenge pumps. The pressure pump draws oil from the reservoir and supplies sufficient
pressure to force the oil through the engine components that require lubricating.
The scavenge pumps collect oil from the planetary gear assembly and the forward engine bearings, the
aft engine bearings, the transfer gearbox and the mid engine bearings, and the accessory drive
gearbox. A common discharge line connects the four scavenge pumps to the engine oil reservoir.
An adjustable pressure regulator in the pumps helps to provide a constant oil pressure by compensating
for changes in the airplane altitude.
A magnetic chip detector is on the aft housing of the pump. All oil scavenged from the engine flows past
the detector. The detector catches any magnetic particles present in the oil due to engine wear for
inspection purposes.