737 Flight Crew Operations Manual
Automatic Flight -
Controls and Indicators
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4.10.2 D6-27370-866-EGP
OFF – disengages A/T and prevents A/T engagement.
2 Changeover (C/O) Switch
Push –
• changes IAS/MACH display between IAS and MACH
• automatic changeover occurs at approximately FL260.
3 MCP Speed Condition Symbols
Overspeed or underspeed limiting symbol appears when commanded speed
cannot be reached.
Underspeed limiting (flashing character “A”) – minimum speed
Overspeed limiting (flashing character “8”) –
• Vmo or Mmo limit
• landing gear limit
• flap limit.
4 IAS/MACH Display
Displays speed selected by IAS/MACH selector
• display is blank when:
• VNAV mode engaged
• A/T engaged in FMC SPD mode
• during 2 engine AFDS go–around
• displays 100 knots when power is first applied
• display range is:
• 100 KIAS – Vmo in 1 knot increments
• .60M – Mmo in .01M increments.
5 N1 Switch
Push – (light not illuminated)
• engages A/T in N1 mode if compatible with AFDS modes already
engaged
• illuminates N1 switch light
• annunciates N1 autothrottle mode.
Push – (light illuminated)
• deselects N1 mode and extinguishes switch light
• engages autothrottles in ARM mode.
September 24, 2015
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