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Falcon 9 Countdown Timeline
All Times Approximate
Launch Vehicle Overview

Time	Event
L-10:00:00	Falcon 9 to Vertical
L-8:30:00	Countdown Initiation, Launch Vehicle Power-Up
L-6:00:00	First Weather Balloon Release
L-5:00:00	Launch Area Evacuation
L-4:45:00	Range Controllers on Station
L-4:35:00	Falcon 9 Attitude Control System N2 Loading
L-4:50:00	Falcon 9 Reconfiguration for Propellant Loading
L-4:37:00	GO for Propellant Loading
L-4:20:00	Rocket Propellant 1 Loading
L-4:00:00	Eastern Range Countdown Initiation
L-4:00:00	LOX Systems Setup & Chilldown Ops
L-3:45:00	LOX Loading
L-2:45:00	Falcon 9 RF & Telemetry Checks
L-2:30:00	Falcon 9 Launch Vehicle Release System Test
L-2:25:00	TEA-TEB Bleed In
L-2:00:00	RP-1 Tanking complete
L-1:45:00	Comm & FTS Checks
L-1:40:00	Data Flow Tests with Downrange Tracking Stations
L-1:30:00	LOX Replenish
L-1:00:00	Weather Briefing
L-0:50:00	RF Link Checks
L-0:45:00	Flight Control System Setup (Flight Software Loading)
L-0:30:00	Final LOX Topping
L-0:27:00	Spacecraft to Internal Power
L-0:13:00	COUNTDOWN HOLD POINT
L-0:13:00	Launch Director Poll
L-0:11:00	Terminal Count Briefing
T-0:10:00	Terminal Countdown
T-0:09:55	Verify that Terminal Countdown has started
T-0:09:50	Range Recorders Start
T-0:09:45	Launch Enable to Flight Mode
T-0:09:30	First Stage Merlin Engine Chilldown, Pre Valves to Open
T-0:09:20	Ground TEA-TEB Setup
T-0:09:17	Merlin 1D: Lox Bleeder Valves Open
T-0:08:15	Engine Trim Valve Cycling
T-0:07:30	Go/No Go for Launch
T-0:07:00	Spacecraft on Internal Power
T-0:07:00	First Stage Heater Shutdown
T-0:07:00	First Stage ACS Close-Out
T-0:06:35	Second Stage Heater Shutdown
T-0:06:25	Falcon 9 to Internal Power
T-0:06:00	Transfer to Internal complete
T-0:05:55	Pressurization for Strongback Retract
T-0:05:30	Strongback Cradles Opening
T-0:05:30	Dragon ready for Solar Array Power Generation (if applicable)
T-0:05:30	Dragon Countdown Auto Sequence (if applicable)
T-0:05:00	Second Stage Nitrogen Loading Termination
T-0:04:46	Stage 1 & Stage 2 Auto Sequence starts
T-0:04:30	Stage 2 Thrust Vector Control Test
T-0:04:25	Strongback Retraction
T-0:04:10	Vehicle Release Auto Sequence
T-0:03:45	Verify Good Mvac TVC
T-0:03:40	TEA-TEB Ignition System Activation
T-0:03:30	Strongback Retraction complete
T-0:03:25	Flight Termination System to Internal Power
T-0:03:05	Flight Termination System Armed
T-0:03:00	LOX Topping Termination
T-0:03:00	Strongback Securing complete
T-0:02:45	Fuel Trim Valve to Flight Position
T-0:02:40	FTS Countdown Sequence
T-0:02:30	Launch Director: Go for Launch
T-0:02:20	Propellant Tank Pre-Press
T-0:02:00	Range Verification
T-0:02:00	Flight Control to Self Alignment
T-0:01:35	Helium Loading Termination
T-0:01:30	Final Engine Chilldown, Pre-Valves/Bleeders Open
T-0:01:20	Engine Purge
T-0:01:00	Flight Computer to start-up
T-0:01:00	Pad Deck Water Deluge System Activation
T-0:00:55	Second Stage to Flight Pressure
T-0:00:50	First Stage Thrust Vector Actuator Test
T-0:00:40	First Stage to Flight Pressure
T-0:00:20	All Tanks at Flight Pressure
T-0:00:15	Arm Pyrotechnics
T-0:00:10	Latest VC Abort
T-0:00:03	Merlin Engine Ignition
T-0:00:00	LIFTOFF

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