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a. 14 CFR Sections 91.153 and 91.169 include the
statement “When a flight plan has been activated, the
pilot-in-command, upon canceling or completing the
flight under the flight plan, shall notify an FAA Flight
Service Station or ATC facility.”
b. An IFR flight plan may be canceled at any time
the flight is operating in VFR conditions outside
Class A airspace by pilots stating “CANCEL MY IFR
FLIGHT PLAN” to the controller or air/ground
station with which they are communicating.
Immediately after canceling an IFR flight plan, a pilot
should take the necessary action to change to the
appropriate air/ground frequency, VFR radar beacon
code and VFR altitude or flight level.
c. ATC separation and information services will be
discontinued, including radar services (where
applicable). Consequently, if the canceling flight
desires VFR radar advisory service, the pilot must
specifically request it.
NOTE−
Pilots must be aware that other procedures may be
applicable to a flight that cancels an IFR flight plan within
an area where a special program, such as a designated
TRSA, Class C airspace, or Class B airspace, has been
established.
d. If a DVFR flight plan requirement exists, the
pilot is responsible for filing this flight plan to replace
the canceled IFR flight plan. If a subsequent IFR
operation becomes necessary, a new IFR flight plan
must be filed and an ATC clearance obtained before
operating in IFR conditions.
e. If operating on an IFR flight plan to an airport
with a functioning control tower, the flight plan is
automatically closed upon landing.
f. If operating on an IFR flight plan to an airport
where there is no functioning control tower, the pilot
must initiate cancellation of the IFR flight plan. This
can be done after landing if there is a functioning FSS
or other means of direct communications with ATC.
In the event there is no FSS and/or air/ground
communications with ATC is not possible below a
certain altitude, the pilot should, weather conditions
permitting, cancel the IFR flight plan while still
airborne and able to communicate with ATC by radio.
This will not only save the time and expense of
canceling the flight plan by telephone but will quickly
release the airspace for use by other aircraft.
5−1−15. RNAV and RNP Operations
a. During the pre−flight planning phase the
availability of the navigation infrastructure required
for the intended operation, including any non−RNAV
contingencies, must be confirmed for the period of
intended operation. Availability of the onboard
navigation equipment necessary for the route to be
flown must be confirmed.
b. If a pilot determines a specified RNP level
cannot be achieved, revise the route or delay the
operation until appropriate RNP level can be ensured.
c. The onboard navigation database must be
appropriate for the region of intended operation and
must include the navigation aids, waypoints, and
coded terminal airspace procedures for the departure,
arrival and alternate airfields.
d. During system initialization, pilots of aircraft
equipped with a Flight Management System or other
RNAV−certified system, must confirm that the
navigation database is current, and verify that the
aircraft position has been entered correctly. Flight
crews should crosscheck the cleared flight plan
against charts or other applicable resources, as well as
the navigation system textual display and the aircraft
map display. This process includes confirmation of
the waypoints sequence, reasonableness of track
angles and distances, any altitude or speed
constraints, and identification of fly−by or fly−over
waypoints. A procedure shall not be used if validity
of the navigation database is in doubt.
e. Prior to commencing takeoff, the flight crew
must verify that the RNAV system is operating
correctly and the correct airport and runway data have
been loaded.

2/19/04 AIM
Departure Procedures 5−2−1
Section 2. Departure Procedures
5−2−1. Pre-taxi Clearance Procedures
a. Certain airports have established pre-taxi
clearance programs whereby pilots of departing
instrument flight rules (IFR) aircraft may elect to
receive their IFR clearances before they start taxiing
for takeoff. The following provisions are included in
such procedures:
1. Pilot participation is not mandatory.
2. Participating pilots call clearance delivery or
ground control not more than 10 minutes before
　
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