AIM

4/3/14

7−3−8

Wake Turbulence

b.

A 3−minute interval will be provided when a

small

 aircraft will takeoff:

1.

From an intersection on the same runway

(same or opposite direction) behind a departing large

aircraft,

2.

In the opposite direction on the same runway

behind a large aircraft takeoff or low/missed

approach.

NOTE

−

This 3

−minute interval may be waived upon specific pilot

request.

c.

A 3−minute interval will be provided for all

aircraft taking off when the operations are as

described in subparagraph b1 and 2 above, the

preceding aircraft is a heavy/B757 jet, and the

operations are on either the same runway or parallel

runways separated by less than 2,500 feet.

Controllers may not reduce or waive this interval.

d.

Pilots may request additional separation i.e.,

2 minutes instead of 4 or 5 miles for wake turbulence

avoidance. This request should be made as soon as

practical on ground control and at least before taxiing

onto the runway.

NOTE

−

14 CFR Section 91.3(a) states: “The pilot

−in−command of

an aircraft is directly responsible for and is the final
authority as to the operation of that aircraft.”

e.

Controllers may anticipate separation and need

not withhold a takeoff clearance for an aircraft

departing behind a large/heavy aircraft if there is

reasonable assurance the required separation will

exist when the departing aircraft starts takeoff roll.