3-9-6. SAME RUNWAY SEPARATION

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  • 3-9-6. SAME RUNWAY SEPARATION

    Separate a departing aircraft from a preceding departing or arriving aircraft using the same runway by ensuring that it does not begin takeoff roll until:

    1. The other aircraft has departed and crossed the runway end or turned to avert any conflict. (See FIG 3-9-1.) If you can determine distances by reference to suitable landmarks, the other aircraft needs only be airborne if the following minimum distance exists between aircraft: (See FIG 3-9-2.)
      1. When only Category I aircraft are involved- 3,000 feet.
      2. When a Category I aircraft is preceded by a Category II aircraft- 3,000 feet.
      3. When either the succeeding or both are Category II aircraft- 4,500 feet.
      4. When either is a Category III aircraft- 6,000 feet.
      5. When the succeeding aircraft is a helicopter, visual separation may be applied in lieu of using distance minima.
      FIG 3-9-1 Same Runway Separation [View 1]
      FIG 3-9-1
      FIG 3-9-2 Same Runway Separation [View 2]
      FIG 3-9-2

      NOTE: Aircraft same runway separation (SRS) categories are specified in FAA Order JO 7360.1, Aircraft Type Designators and based upon the following definitions:

      • CATEGORY I* small single-engine propeller driven aircraft weighing 12,500 lbs. or less, and all helicopters.
      • CATEGORY II* small twin-engine propeller driven aircraft weighing 12,500 lbs. or less.
      • CATEGORY III* all other aircraft.
    2. A preceding landing aircraft is clear of the runway. (See FIG 3-9-3.)
      FIG 3-9-3 Preceding Landing Aircraft Clear of Runway
      FIG 3-9-3

      WAKE TURBULENCE APPLICATION

    3. Do not issue clearances which imply or indicate approval of rolling takeoffs by super or heavy aircraft except as provided in Para 3-1-14, Ground Operations When Volcanic Ash is Present.
    4. Do not issue clearances to a small aircraft to line up and wait on the same runway behind a departing super or heavy aircraft to apply the necessary intervals.
    5. The minima in Para 5-5-4, Minima, subparagraph g, may be applied in lieu of the time interval requirements in subparagraphs f, g, and h. When Para 5-5-4, Minima, is applied, ensure that the appropriate radar separation exists at or prior to the time an aircraft becomes airborne.
      • REFERENCE
      • FAA Order JO 7210.3, Para 2-1-16, Authorization for Separation Services by Towers.
      • FAA Order JO 7210.3, Para 10-5-3, Functional Use of Certified Tower radar Displays.
      • NOTE: The pilot may request additional separation, but should make this request before taxiing on the runway.
      • NOTE: Takeoff clearance to the following aircraft should not be issued until the time interval has passed after the preceding aircraft begins takeoff roll.
    6. Separate aircraft taking off from the same runway or a parallel runway separated by less than 2,500 feet (See FIG 3-9-4.):
      1. Heavy, large, or small behind super - 3 minutes.
      2. Heavy, large, or small behind heavy - 2 minutes.
      FIG 3-9-4 Same Runway Separation
      FIG 3-9-4
    7. Separate a small behind a B757 aircraft by 2 minutes when departing:
      1. The same runway or a parallel runway separated by less than 700 feet. (See FIG 3-9-5 and FIG FIG 3-9-6.)
        FIG 3-9-5 Same Runway Separation
        FIG 3-9-5
        FIG 3-9-6 Parallel Runway Separated by Less than 700 Feet
        FIG 3-9-6
      2. A parallel runway separated by 700 feet or more if projected flight paths will cross. (See FIG 3-9-7).
        FIG 3-9-7 Parallel Runway Separated by 700 Feet or More Projected Flight Paths Cross
        FIG 3-9-7
    8. Separate aircraft departing from a parallel runway separated by 2,500 feet or more if projected flight paths will cross (See FIG 3-9-8):
      1. Heavy, large, or small behind super - 3 minutes.
      2. Heavy, large, or small behind heavy - 2 minutes.
      FIG 3-9-8 Parallel Runways Separated by 2,500 feet or More
      FIG 3-9-8
    9. Separate aircraft when operating on a runway with a displaced landing threshold if projected flight paths will cross when either a departure follows an arrival or an arrival follows a departure by the following minima:
      1. Heavy, large, or small behind super - 3 minutes.
      2. Heavy, large, or small behind heavy - 2 minutes.
      3. Small behind B757 - 2 minutes.
    10. Separate an aircraft behind another aircraft that has departed or made a low/missed approach when utilizing opposite direction takeoffs or landings on the same or parallel runways separated by less than 2,500 feet by the following minima:
      1. Heavy, large, or small behind super - 4 minutes.
      2. Heavy, large, or small behind heavy - 3 minutes
    11. Separate a small aircraft behind a B757 that has departed or made a low/missed approach by 3 minutes when utilizing opposite direction takeoffs or landings from:
      1. The same runway or a parallel runway separated by less than 700 feet.
      2. A parallel runway separated by 700 feet or more if projected flight paths will cross.
    12. Do not approve pilot requests to deviate from the required intervals contained in subparagraphs f through k.
      • PHRASEOLOGY
      • HOLD FOR WAKE TURBULENCE.
    13. Separate a small aircraft behind a large aircraft (except B757) that has departed or made a low/missed approach when utilizing opposite direction takeoffs on the same runway by 3 minutes unless a pilot has initiated a request to deviate from the time interval. In the latter case, issue a wake turbulence cautionary advisory before clearing the aircraft for takeoff. Controllers must not initiate or suggest a waiver of the time interval.

      NOTE: A request for takeoff does not initiate a waiver request.

    14. Inform aircraft when it is necessary to hold in order to provide the required time interval.
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