Hawker Beechcraft Hawker 800XP, Руководство по эксплуатации для пилотов

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Page 2-12
Pilot’s Operating Manual
Revision A1: Nov, 2002
Sub-section 2
ENGINES
Hawker 800XP Pro Line 21
Section III - SYSTEMS DESCRIPTION
The triangular N
1
REF bug is positioned on the perimeter of each N
1
scale with the apex of the triangle
at the point that corresponds with the N
1
REF digital read-out. The bug is the same color as the digital
read-out and is removed when the read-out does not appear. In the FMS mode, each bug is placed at
the position corresponding to the lower of the two FMS inputs.
In FMS control, the N
1
REF icon, thrust limit legend and digital read-out are placed in a yellow box and
the N
1
REF value shows in yellow when:
• N
1
thrust limit values from the FMSs differ by more than 1%.
• Data input from one FMS is reported invalid when airspeed is less than 50 KIAS.
The N
1
miscompare annunciation will flash for 5 seconds when first displayed, then remains steady.
In FMS control, if neither FMS is sending a selected thrust limit or the N
1
REF data from both FMS’s is
failed, not received or outside the N
1
REF display ranges:
• The N
1
REF digital read-out and bugs are removed.
• The REFS menu FMS read-out and the thrust limit legend on the EIS display are replaced by three
magenta colored dashes.
ITT DISPLAYS
Ten thermocouples, two pairs of five thermocouples connected in parallel to create an averaging circuit,
are located in the gas path between the high pressure turbine and the first stage of the low pressure
turbine. These thermocouples measure the Interstage Turbine Temperature (ITT) and send signals to
the Engine Data Concentrator (EDC) and the fuel computer.
The ITT display indicates the temperature between the first and second turbine stages in
°
C. The ITT
display consists of a scale, pointer and digital read-out for each engine. The ITT and N
1
share a scale
for the same engine.
The ITT scale range is 200 to 1100
°
C. The gray tick marks on the ITT scale represent 200, 400, 600,
800 and 1100
°
C. There is a red radial tick mark at the ITT Normal Limit, as listed in the following table,
for the respective Operating Condition. In order to present the Normal Limit at the same scale position
for all Operating Conditions, the scaling between 800
°
C and 1100
°
C changes slightly for each
Operating Condition. Therefore, a small ITT pointer movement may occur when transitioning between
Operating Conditions.
The ITT pointer is positioned at the ITT digital display value, except the ITT pointer only appears when
ITT is above 200
°
C. The ITT pointer is the same color as the digital display and flashes when the display
flashes. The ITT digital display appears below the N
1
digital read-out, to the left of the N
1
/ITT indication
with a range of 0 to 1100
°
C.
The ITT digital read-out and pointer are white when ITT is within the normal limit and red when ITT is
above the normal limit.
If all sources of ITT are flagged or missing, the ITT pointer is removed and four yellow dashes with a
decimal point are displayed for the digital read-out. The following lists the ITT normal and redline limits
for engine start and engine operation.