250 Below 10

[JoePa]

Are controllers permitted to waive the 250 below 10 restriction? Specifically a tower controller in class D? does it matter if its a military controller? I have heard a lot of opinions on this, looking for some place to back it up. Thanks

"Go State"

 

[brokeflyer]

Are controllers permitted to waive the 250 below 10 restriction? Specifically a tower controller in class D? does it matter if its a military controller? I have heard a lot of opinions on this, looking for some place to back it up. Thanks

"Go State"

If it's class D then you have to get past the 200kt restriction first. But yes, they can waive the speed restriction in class D.

 

[CA1900]

No, they aren't. Only the administrator can do that. The tower controller can waive the 200 knot Class D restriction, but not the 250 below 10,000 restriction. 91.117 is quite explicit about this:

(a) Unless otherwise authorized by the Administrator, no person may operate an aircraft below 10,000 feet MSL at an indicated airspeed of more than 250 knots (288 m.p.h.).

(b) Unless otherwise authorized or required by ATC, no person may operate an aircraft at or below 2,500 feet above the surface within 4 nautical miles of the primary airport of a Class C or Class D airspace area at an indicated airspeed of more than 200 knots (230 mph.). This paragraph (b) does not apply to any operations within a Class B airspace area. Such operations shall comply with paragraph (a) of this section.

(c) No person may operate an aircraft in the airspace underlying a Class B airspace area designated for an airport or in a VFR corridor designated through such a Class B airspace area, at an indicated airspeed of more than 200 knots (230 mph).

(d) If the minimum safe airspeed for any particular operation is greater than the maximum speed prescribed in this section, the aircraft may be operated at that minimum speed.

 

[Singlecoil]

...and since you were wondering about military controllers, take a look at Part B above. Many commercial and military aircraft will be too heavy to (or for fighters not designed to) fly 250 knots with the flaps up, so they go faster. No permission required.

 

[mule]

I'm not trying to be a smarta$$, but what aircraft are too heavy to slow to 250?

 

[cjdriver]

I'm not trying to be a smarta$$, but what aircraft are too heavy to slow to 250?

By all means, be a smarta$$, that's just frigging ridiculous. Yes, any aircraft can slow to 200. Show me one that can't.

 

[Singlecoil]

(d) If the minimum safe airspeed for any particular operation is greater than the maximum speed prescribed in this section, the aircraft may be operated at that minimum speed.

How about an MD-80? 747?

You do not have to put flaps out to follow the rule as indicated above. A heavy 737 can't slow to 200 and keep the flaps up, so you don't have to when flying under Class B. Just fly the minimum clean speed. An MD-80 taking off heavy will need about 260 knots clean maneuver speed. Only a dolt would leave the flaps out to comply with the 250 rule in that case.

 

[cjdriver]

(d) If the minimum safe airspeed for any particular operation is greater than the maximum speed prescribed in this section, the aircraft may be operated at that minimum speed.

How about an MD-80? 747?

You do not have to put flaps out to follow the rule as indicated above. A heavy 737 can't slow to 200 and keep the flaps up, so you don't have to when flying under Class B. Just fly the minimum clean speed. An MD-80 taking off heavy will need about 260 knots clean maneuver speed. Only a dolt would leave the flaps out to comply with the 250 rule in that case.

That is interesting. Do MD80's leave flaps in until clear of the airspace, or just break the restriction? Just curious.

 

[nethan]

Well they are not really "breaking the restriction" because they meet the criteria for the exemption. Nice how that works out eh?

 

[brokeflyer]

No, they aren't. Only the administrator can do that. The tower controller can waive the 200 knot Class D restriction, but not the 250 below 10,000 restriction. 91.117 is quite explicit about this:

(a) Unless otherwise authorized by the Administrator, no person may operate an aircraft below 10,000 feet MSL at an indicated airspeed of more than 250 knots (288 m.p.h.).

(b) Unless otherwise authorized or required by ATC, no person may operate an aircraft at or below 2,500 feet above the surface within 4 nautical miles of the primary airport of a Class C or Class D airspace area at an indicated airspeed of more than 200 knots (230 mph.). This paragraph (b) does not apply to any operations within a Class B airspace area. Such operations shall comply with paragraph (a) of this section.

(c) No person may operate an aircraft in the airspace underlying a Class B airspace area designated for an airport or in a VFR corridor designated through such a Class B airspace area, at an indicated airspeed of more than 200 knots (230 mph).

(d) If the minimum safe airspeed for any particular operation is greater than the maximum speed prescribed in this section, the aircraft may be operated at that minimum speed.

yeah i figured i was right.

 

[JoePa]

Thanks for the info and ref to the reg's. Does anyone know if military controllers have 'permission' from the administrator to waive speed restrictions? much like the those restrictions are removed in MOA's/restricted areas and specific low level routes? thanks again.

 

[Say Again Over]

yeah i figured i was right by brokeflyer

Right? Right about what, controllers do not have the authority to allow you to exceed 250 below 10K, how many times does this subject have to be debated?

By all means, be a smarta$$, that's just frigging ridiculous. Yes, any aircraft can slow to 200. Show me one that can't.

I don't fly the Whale, but I believe they occasionally need to operate at a higher speed on departure, the PIC has the authority to do this, see paragraph (d).

 

[Father Jack]

B-777200-LR on climb out, 260kias.

 

[BlackPilot628]

I think this airspeed refers to the "CLEAN AIRSPEED". ATC does not expect large aircraft to get dirty early. You will here this is ATL quite a bit. The Heavy guys coming in declining the speed reduction.

 

[WMUSIGPI]

We cleaned up at 210kts on departure in the Avro. That was the normal procedures for the airplane even if we were departing C or D airspace. The 200kts rule didn't apply because of the needs of the airplane.

 

[big pimpn']

On the whale, we have to accelerate to 280 plus on heavy takeoffs due to operational necessity. Otherwise we would have to leave our flaps down through 10k which is ludicrous. We’ve been doing this for many years and this has never been an issue.

(d) If the minimum safe airspeed for any particular operation is greater than the maximum speed prescribed in this section, the aircraft may be operated at that minimum speed.

 

[PBRstreetgang]

Thanks for the info and ref to the reg's. Does anyone know if military controllers have 'permission' from the administrator to waive speed restrictions? much like the those restrictions are removed in MOA's/restricted areas and specific low level routes? thanks again.

"Public use", (military) aircraft are exempt from the FARs. Compliance is usually built into their SOP, they don't get violated by the FAA, just "THE BOSS".
PBR

 

[Lrjtcaptain]

We authorize heavies all the time to exceed the 250kt rule in Class B. Get a B747-400 to RJAA without doing a 280KT climb...good luck. We authorize it all day every day.

 

[AC560]

"Public use", (military) aircraft are exempt from the FARs. Compliance is usually built into their SOP, they don't get violated by the FAA, just "THE BOSS".
PBR

"(Exemption to Federal Air Regulations 91.177 issued to DOD, May 18, 1978)-Operations below 10,000 feet Mean Sea Level at Indicated Air Speed in excess of 250 knots, in noncompliance with Federal Air Regulations 91.117 (a), are authorized for military aircraft, including Reserve and Air National Guard components, only under the following conditions:...

"g. If the airspeed required or recommended in the airplane flight manual to maintain safe maneuverability is greater than the maximum speed described in Federal Air regulations 91.117, the airplane may be operated at that speed."

I believe there was a case a couple years ago where 2 guys at an airshow lost their civilian certificates for a 91.117 violation.

We authorize heavies all the time to exceed the 250kt rule in Class B. Get a B747-400 to RJAA without doing a 280KT climb...good luck. We authorize it all day every day.

So you say to a 744 on departure going to RJAA "Fly 280kts heading 360" or does the pilot advise you that is what he is doing. My understanding has always been the requirement is for the pilot to advise per AIM 4-4-12 there is no authorization from ATC. If you have this authority what was the logic for the IAH high speed departure test a couple years back?

 

[westwind driver]

(d) If the minimum safe airspeed for any particular operation is greater than the maximum speed prescribed in this section, the aircraft may be operated at that minimum speed.

How about an MD-80? 747?

You do not have to put flaps out to follow the rule as indicated above. A heavy 737 can't slow to 200 and keep the flaps up, so you don't have to when flying under Class B. Just fly the minimum clean speed. An MD-80 taking off heavy will need about 260 knots clean maneuver speed. Only a dolt would leave the flaps out to comply with the 250 rule in that case.

Where do you get your numbers?

MD80 series (reference the -83 here) If you look at the charts, assuming MGTOW of 149,500#, using the 150,000# chart, 33 degress C at sea level, Altimeter 30.06, dry runway, no wind, Flaps 15

Here are your speeds:

V1: 143
VR: 147
V2: 154
Flap Retract: 169
Slat Retract: 202
Final Segment: 223
Clean Maneuver: 252

The airplane will fly just fine cleaned up at 250 and climb no problem. Once you hit 10k push the nose over for a 300-320kt climb.

I don't think the Maddog is like a true heavy that has to have the slats out up till around 280. Comming out of Charlotte, ATC has to cancel a 280 speed restriction.

As for the 250/10k rule, well... Been into North Dakota airports and had controllers tell us no speed restriction below 10,000, and this was on the descent. Ultimately, if this question went to court, I would think the PIC is required to adhere to FAR/AIM regardless of what ATC tells you. Just MHO.