737 Flight Crew Operations Manual
Engines, APU -
Over/Under – Displays
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7.11.4 D6-27370-866-EGP
2 N1 SET Inner Knob (spring-loaded to center)
Rotate – positions reference N1 bug(s) and readouts when N1 SET outer knob is
set to BOTH, 1, or 2.
3 Reference N1 Bugs
Displayed (green) – with N1 SET outer knob in AUTO, 1, 2 or BOTH position.
Position corresponds to digital value on the Reference N1 Readout.
4 N1 Redlines
Displayed (red) – N1% RPM operating limit
5 N1 Command Sectors
Displayed (white) – momentary difference between actual N1 and value
commanded by thrust lever position.
6 N1 RPM Readouts (digital)
Displayed (white) – normal operating range.
Displayed (red) –
• operating limit exceeded
• on ground after engine shutdown, red box indicates an inflight
exceedance has occurred.
7 Reference N1 Readouts
Displayed (green) –
• manually set N1% RPM when N1 SET outer knob is in BOTH, 1, or 2
position
• – – – – when N1 SET outer knob is in AUTO position and FMC source
invalid.
• when N1 SET outer knob is in AUTO position, may indicate fixed
derate, assumed temperature derate, or a combination of fixed and
assumed temperature derate
Not Displayed when Reverse Thrust is selected.
8 N1 RPM Indications
Displays N1% RPM:
• displayed (white) – normal operating range
• displayed (red) – operating limit exceeded.
September 18, 2008
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