Aircraft departs off runway 2L then a different aircraft lands 20R full stop. The arrival is a small. If the departure is a small plus or large (but never a B757/heavy) is there a MANDATORY wake turbulence advisory and/or time/milage amount?
departure followed by full stop opposite direction
- Thread starter meatasaurusx
- Start date
Ref 3-9-6 sec i, the use of the term behind doesn't necessarily mean the physical location of the aircraft but the sequence of events. So drawing from that, it would be understood that use of behind in the other section above would mean either the physical location or the sequence of events.
Just a cautionary advisory is issued here. That's just for the possibility of encountering turbulence. The only mandatory times occur behind heavy/B757 only, everything else is waiverable ...... The opposite direction 3 min. Rule is for successive departures as well. Whenever in doubt issue the advisory! It never hurts
Cautionary advisory for all, sure.
Small landing after a Small + takes off opposite direction: No minute sep, unless the arrival is going to do a touch and go (become an intersection departure, and thus be affected by another section).
Small landing after a large takes off opposite direction: No minute separation, because the rule for opposite direction "small after a large" is for departures, not arrivals. This changes if the Small is doing a low approach or touch and go (becomes a departing aircraft).
Anyone feel otherwise? If so, why?
Small landing after a Small + takes off opposite direction: No minute sep, unless the arrival is going to do a touch and go (become an intersection departure, and thus be affected by another section).
Small landing after a large takes off opposite direction: No minute separation, because the rule for opposite direction "small after a large" is for departures, not arrivals. This changes if the Small is doing a low approach or touch and go (becomes a departing aircraft).
Any aircraft arriving after a heavy/B757 departs opposite direction: 3 minutes, because the paragraph includes "takeoffs and landings:"
As for issuing cautionary advisories:
Everyone's been mentioning those paragraphs, but I thought it'd be nice to have it right here for reference. So for the specific question in the OP:
If it was a small plus departure, nothing is required. If it is a large, a cautionary advisory is required (though some may actually debate the meaning of "behind" in 3-10-3 b. NOT POINTING FINGERS!) If the departure is a heavy/B757, 3 minutes is required.
Anyone feel otherwise? If so, why?
In the case of a landing aircraft behind a heavy/b757 departure, it is just a cautionary. There is no 3 minute rule, just cautionary again.
7110.65U 3-10-3 b.
b. Issue wake turbulence advisories, and the
position, altitude if known, and the direction of flight
of:
1. The heavy jet/B757 to aircraft landing behind
a departing/arriving heavy jet/B757 on the same or
parallel runways separated by less than 2,500 feet.
That section is covering departure procedures and separation, not the arrival procedures and separation. What that section is saying is pretty much if you launch a heavy off your departure runway or if you are landing and departing off a certain runway that a heavy has conducted a low or missed approach and you are attempting to depart another a/c from that same runway but opposite direction (ie ry 36 vs ry 18), then apply 3 minute interval.
The section above that I cited stated that if you launch a heavy from the same runway or if a heavy has landed the same runway, (regardless of opposite direction or intersection departure), a cautionary advisory is mandatory.
I've been reviewing Ch 3 Sec 9 and I'm still on the fence. All of the other paragraphs in this section say either "Separate a departing aircraft" or "Separate an aircraft taking off."
In 3-9-6 i and j, it just says "separate aircraft behind."
In the case of subpara i, it specifies "when utilizing opposite direction takeoffs."
In the case of subpara j, it includes both "takeoffs" and "landings." It'd be nice if it started out "Separate an aircraft taking off behind a Heavy/B757..." This paragraph include both takeoffs and landings, but doesn't really specify which aircraft (if it's not both) are doing the taking off or landing.
God I love this book.
In 3-9-6 i and j, it just says "separate aircraft behind."
In the case of subpara i, it specifies "when utilizing opposite direction takeoffs."
In the case of subpara j, it includes both "takeoffs" and "landings." It'd be nice if it started out "Separate an aircraft taking off behind a Heavy/B757..." This paragraph include both takeoffs and landings, but doesn't really specify which aircraft (if it's not both) are doing the taking off or landing.
God I love this book.