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Instrument Flying Handbook
IFR Flight
Clearances

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Instrument Flying
Handbook

Preface

Table of Contents

Chapter 1. Human Factors
Chapter 2. Aerodynamic Factors
Chapter 3. Flight Instruments
Chapter 4. Section I
Airplane Attitude Instrument
Flying
Using Analog Instrumentation
Chapter 4. Section II
Airplane Attitude Instrument
Flying
Using an Electronic Flight
Display

Chapter 5. Section I
Airplane Basic
Flight Maneuvers
Using Analog Instrumentation
Chapter 5. Section II
Airplane Basic
Flight Maneuvers
Using an Electronic Flight
Display

Chapter 6. Helicopter
Attitude Instrument Flying

Chapter 7. Navigation Systems
Chapter 8. The National
Airspace System

Chapter 9. The Air Traffic
Control System

Chapter 10. IFR Flight
Chapter 11. Emergency
Operations

A pilot who files directly with the ARTCC reports present
position and altitude, and submits only the flight plan
information normally relayed from the AFSS to the ARTCC.
Be aware that traffic saturation frequently prevents ARTCC
personnel from accepting flight plans by radio. In such
cases, a pilot is advised to contact the nearest AFSS to file
the flight plan.

Canceling IFR Flight Plans
An IFR flight plan may be cancelled any time a pilot is
operating in VFR conditions outside Class A airspace by
stating "cancel my IFR flight plan" to the controller or air-to-
ground station. After canceling an IFR flight plan, the pilot
should change to the appropriate air-to-ground frequency,
transponder code as directed, and VFR altitude/flight level.

ATC separation and information services (including radar
services, where applicable) are discontinued when an IFR
flight plan is cancelled. If VFR radar advisory service is
desired, a pilot must specifically request it. Be aware that
other procedures may apply when canceling an IFR flight
plan within areas such as Class C or Class B airspace.

When operating on an IFR flight plan to an airport with
an operating control tower, a flight plan is cancelled

automatically upon landing. If operating on an IFR flight
plan to an airport without an operating control tower, the
pilot is responsible for canceling the flight plan. This can
be done by telephone after landing if there is no operating
FSS or other means of direct communications with ATC.
When there is no FSS or air-to-ground communications are
not possible below a certain altitude, a pilot may cancel an
IFR flight plan while still airborne and able to communicate
with ATC by radio. If using this procedure, be certain the
remainder of the flight can be conducted under VFR. It is
essential that IFR flight plans be cancelled expeditiously. This
allows other IFR traffic to utilize the airspace.

Clearances
An ATC clearance allows an aircraft to proceed tinder
specified traffic conditions within controlled airspace for the
purpose of providing separation between known aircraft.

Examples
A flight filed for a short distance at a relatively low altitude
in an area of low traffic density might receive a clearance
as follows:

"Cessna 1230 Alpha, cleared to Doeville airport direct,
cruise 5,000."

Flight Plan Form
Figure 10-1. Flight Plan Form.

 
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