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Take-off and rejected take-off
B737 SOP · Chapter 5

B737 Takeoff and Rejected Takeoff

Opening your chapter…

B737 SOP chapter 5, Take-off & Rejected Take-off. By the end of this chapter you can explain the pre-briefed reject decision, monitored roll, V-speed boundaries and the distinct actions after a stop or a continued take-off.

  • 4 pages
  • 40 min of reading
  • 12 question chapter check
  • Notes, highlights and progress saved

What this chapter covers

  1. 1
    The decision is made before the rollWritten from standard 737 phase-of-flight operating procedure
    9 min read
  2. 2
    Monitoring the take-off rollWritten from standard 737 phase-of-flight operating procedure
    9 min read
  3. 3
    V-speeds and the two speed regimesWritten from standard 737 phase-of-flight operating procedure
    13 min read
  4. 4
    Carry out the decision, then assessWritten from standard 737 phase-of-flight operating procedure
    9 min read

737 takeoff and RTO terms

Takeoff briefing
Agrees the runway, performance, reject criteria and who calls and decides before the roll.
RTO (rejected takeoff)
Stopping the takeoff: thrust idle, maximum braking, speedbrakes and reverse, and a full stop on the centreline.
V1 callout
Tells both pilots the stopping window has closed. The first stopping action must already be under way by V1.
VEF
The speed at which the critical engine is assumed to fail during takeoff.
VMCG
Minimum control speed on the ground, using aerodynamic controls only. V1 cannot be below it.
VR
Rotation speed, chosen so V2 is reached by 35 ft above the runway.
V2
Takeoff safety speed: the minimum speed by 35 ft and the climb target with an engine failed.
Low speed regime
Below the operator's boundary, commonly 80 to 100 kt: reject for any significant failure.
High speed regime
From the boundary to V1: reject only for a serious event such as engine failure or fire.
Thrust set callout
The PM confirms each engine is producing its planned takeoff thrust early in the roll.
Airspeed cross-check
Both airspeed indications compared at a low speed, while stopping is still easy.

Try a question from this chapter

Chapter check, question 1 of 12

Why are reject criteria agreed in the take-off briefing?

737 rejected takeoff questions

What is the rejected takeoff procedure?

Call the reject clearly, reduce thrust to idle, apply maximum braking, use speedbrakes and reverse thrust, keep the centreline and stop completely. Then inform ATC and the cabin and assess the aircraft.

Is V1 the decision speed?

Not exactly. V1 is the maximum speed by which the first stopping action must already have begun. A safe reject decision has to be made before V1, because recognition and reaction take time.

What are the two speed regimes on takeoff?

Below the operator's boundary, commonly 80 to 100 kt, the crew rejects for any significant failure. From that boundary to V1, only for a serious event like engine failure or fire. Above V1 the takeoff continues.

Why continue the takeoff after V1?

There may not be enough runway left to stop, while the aircraft is certified to climb away with an engine failed. Continuing is almost always safer than a late stop.

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