Originally Posted by
saab2000
The other day at CLT I was instructed on downwind at 7000 in the CRJ-200 to slow to 150 knots. I said, "Unable". She repeated the instruction
They need to read their own rules, to wit:
2/16/06 7110.65R
Chapter 5, Section 7
PDF page 241 of 492
Speed Adjustment 5−7−3
TO MACH (Mach number),
or
(number of knots) KNOTS.
NOTE−
When specifying descent prior to speed reduction, consider
the maximum speed requirements specified in 14 CFR
Section 91.117. It may be necessary for the pilot to level off
temporarily and reduce speed prior to descending below
10,000 feet MSL.
d. Specify combined speed/altitude fix crossing
restrictions.
PHRASEOLOGY−
CROSS (fix) AT AND MAINTAIN (altitude) AT (specified
speed) KNOTS.
EXAMPLE−
“Cross Robinsville at and maintain six thousand at
two three zero knots.”
REFERENCE−
FAAO 7110.65, Numbers Usage, Para 2−4−17.
FAAO 7110.65, Altitude Information, Para 4−5−7.
5−7−3. MINIMA
When assigning airspeeds, use the following
recommended minima:
a. To aircraft operating between FL 280 and
10,000 feet, a speed not less than 250 knots or the
equivalent Mach number.
NOTE−
1. On a standard day the Mach numbers equivalent to
250 knots CAS (subject to minor variations) are:
FL 240−0.6
FL 250−0.61
FL 260−0.62
FL 270−0.64
FL 280−0.65
FL 290−0.66.
2. If a pilot is unable to comply with the speed assignment,
the pilot will advise.
b. When an operational advantage will be
realized, speeds lower than the recommended
minima may be applied.
c. To arrival aircraft operating below 10,000 feet:
1. Turbojet aircraft. A speed not less than
210 knots; except when the aircraft is within 20 flying
miles of the runway threshold of the airport of
intended landing, a speed not less than 170 knots.
2. Reciprocating engine and turboprop aircraft.
A speed not less than 200 knots; except when the
aircraft is within 20 flying miles of the runway
threshold of the airport of intended landing, a speed
not less than 150 knots.
d. Departures:
1. Turbojet aircraft. A speed not less than
230 knots.
2. Reciprocating engine and turboprop aircraft.
A speed not less than 150 knots.
e. Helicopters. A speed not less than 60 knots.
REFERENCE−
FAAO 7110.65, Methods, Para 5−7−2.
5−7−4. TERMINATION
Advise aircraft when speed adjustment is no longer
needed.
PHRASEOLOGY−
RESUME NORMAL SPEED.
NOTE−
An instruction to “resume normal speed” does not delete
speed restrictions that are applicable to published
procedures of upcoming segments of flight, unless
specifically stated by ATC. This does not relieve the pilot
of those speed restrictions which are applicable to 14 CFR
Section 91.117.