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pilot’s opinion, would place the aircraft in jeopardy,
IT IS THE PILOT’S RESPONSIBILITY TO
REQUEST AN AMENDED CLEARANCE. Similarly,
if a pilot prefers to follow a different course of
action, such as make a 360−degree turn for spacing to
follow traffic when established in a landing or
approach sequence, land on a different runway,
takeoff from a different intersection, takeoff from the
threshold instead of an intersection, or delay
operation, THE PILOT IS EXPECTED TO INFORM
ATC ACCORDINGLY. When the pilot
requests a different course of action, however, the
pilot is expected to cooperate so as to preclude the
disruption of the traffic flow or the creation of
conflicting patterns. The pilot is also expected to use
the appropriate aircraft call sign to acknowledge all
ATC clearances, frequency changes, or advisory
information.
27.1.3Each pilot who deviates from an ATC
clearance in response to a traffic alert and collision
avoidance system resolution advisory shall notify
ATC of that deviation as soon as possible.
27.1.4When weather conditions permit, during the
time an IFR flight is operating, it is the direct
responsibility of the pilot to avoid other aircraft since
VFR flights may be operating in the same area
without the knowledge of ATC, and traffic clearances
provide standard separation only between IFR
flights.
27.2Clearance Prefix
A clearance, information, or request for information
originated by an ATC facility and relayed to the pilot
through an air/ground communication station will be
prefixed by ATC CLEARS, ATC ADVISES," or
ATC REQUESTS."
27.3Clearance Items
27.3.1An ATC clearance normally contains the
following:
27.3.1.1Clearance Limit.The traffic clearance
issued prior to departure will normally authorize
flight to the airport of intended landing. Under certain
conditions at some locations, a short−range clearance
procedure is utilized whereby a clearance is issued to
a fix within or just outside the terminal area and pilots
are advised of the frequency on which they will
receive the long−range clearance direct from the
center controller.
27.3.1.2Departure Procedure.Headings to fly
and altitude restrictions may be issued to separate a
departure from other air traffic in the terminal area.
Where the volume of traffic warrants, instrument
departure procedures (DPs) have been developed.
(See ENR 1.5.)
27.3.1.3Route of Flight
a)Clearances are normally issued for the
altitude/flight level and route filed by the pilot.
However, due to traffic conditions, it is frequently
necessary for ATC to specify an altitude/flight level
or route different from that requested by the pilot. In
addition, flow patterns have been established in
certain congested areas, or between congested areas,
whereby traffic capacity is increased by routing all
traffic on preferred routes. Information on these flow
patterns is available in offices where preflight
briefing is furnished or where flight plans are
accepted.
b)When required, air traffic clearances include
data to assist pilots in identifying radio reporting
points. It is the responsibility of a pilot to notify ATC
immediately if the radio equipment cannot receive
the type of signals the pilot must utilize to comply
with the clearance.
ENR 1.1−24 AIP
15 MAR 07 United States of America
Nineteenth Edition Federal Aviation Administration
27.3.1.4Altitude Data
a)The altitude/flight level instructions in an ATC
clearance normally require that a pilot MAINTAIN"
the altitude/flight level to which the flight will
operate when in Classes A, B, C, D, and E airspace.
Altitude/flight level changes while en route should be
requested prior to the time the change is desired.
b)When possible, if the altitude assigned is
different than that requested by the pilot, ATC will
inform an aircraft when to expect climb or descent
clearance or to request altitude change from another
facility. If this has not been received prior to crossing
the boundary of the ATC facility’s area and
assignment at a different flight level is still desired,
the pilot should reinitiate the request with the next
facility.
c)The term CRUISE" may be used instead of
MAINTAIN" to assign a block of airspace, to a pilot,
from the minimum IFR altitude up to and including
the altitude specified in the cruise clearance. The pilot
may level off at any intermediate altitude within this
block of airspace. Climb/descent within the block is
　
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