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6/17/21 

AIM 

5.  Item 13.  Departure Aerodrome/Time 

(a) 

Insert the ICAO four

letter location 

indicator of the departure aerodrome, or 

NOTE

 

ICAO location indicators must consist of 4 letters. Airport 
identifiers such as 5IA7, 39LL and Z40 are not in ICAO 
standard format. 

(b) 

If no four

letter location indicator has 

been assigned to the departure aerodrome, insert 
ZZZZ and specify the non

ICAO location identifier, 

or fix/radial/distance from a nearby NAVAID, 
followed by the name of the aerodrome, in Item 18, 
following characters DEP/, 

(c) 

Then, without a space, insert the estimated 

off

block time. 

EXAMPLE

 

1. 

KSMF2215 

2. 

ZZZZ0330 

6.  Item 15.  Cruise Speed, Level and Route 

(a) 

Cruise Speed (maximum 5 characters). 

Insert the true airspeed for the first or the whole 
cruising portion of the flight, in terms of knots, 
expressed as N followed by 4 digits (e.g. N0485), or 
Mach number to the nearest hundredth of unit Mach, 
expressed as M followed by 3 digits (for example, 
M082). 

(b) 

Cruising level (maximum 5 characters). 

Insert the planned cruising level for the first or the 
whole portion of the route to be flown, in terms of 
flight level, expressed as F followed by 3 figures (for 
example, F180; F330), or altitude in hundreds of feet, 
expressed as A followed by 3 figures (for example, 
A040; A170). 

(c) 

Route. Insert the requested route of flight 

in accordance with guidance below. 

NOTE

 

Speed and/or altitude changes en route will be accepted by 
FAA computer systems, but will not be processed or 
forwarded to controllers. Pilots are expected to maintain 
the last assigned altitude and request revised altitude 
clearances directly from ATC. 

(d) 

Insert the desired route of flight using a 

combination of published routes and/or fixes in the 
following formats: 

(1) 

Consecutive fixes, NAVAIDs and way-

points should be separated by the characters “DCT”, 
meaning direct. 

EXAMPLE

 

FLACK DCT IRW DCT IRW125023 

NOTE

 

IRW125023 identifies the fix located on the Will Rogers 
VORTAC 125 radial at 23 DME. 

(2) 

Combinations of published routes, and 

fixes, NAVAIDs or waypoints should be separated by 
a single space. 

EXAMPLE

 

WORTH5 MQP V66 ABI V385 

(3) 

Although it is recommended that filed 

airway junctions be identified using a named junction 
fix when possible, there may be cases where it is 
necessary to file junctioning airways without a named 
fix.  In these cases, separate consecutive airways with 
a space. 

EXAMPLE

 

V325 V49 

NOTE

 

This method of filing an airway junction may result in a 
processing ambiguity. This might cause the flight plan to be 
rejected in some cases. 

7.  Item 16.  Destination Aerodrome, Total 

EET, Alternate and 2nd Alternate Aerodrome 

(a) 

Destination Aerodrome and Total Esti-

mated Elapsed Time (EET). 

(1) 

Insert the ICAO four

letter location 

identifier for the destination aerodrome; or, if no 
ICAO location identifier has been assigned, 
(Location identifiers, such as WY66, A08, and 5B1, 
are not an ICAO standard format), 

(2) 

Insert ZZZZ and specify the non

ICAO 

location identifier, or fix/radial/distance from a 
nearby NAVAID, followed the name of the 
aerodrome, in Item 18, following characters DEST/, 

(3) 

Then, without a space, insert the total 

estimated time en route to the destination. 

EXAMPLE

 

1. 

KOKC0200 

2. 

ZZZZ0330 

(b) 

Alternate and 2nd Alternate Aerodrome 

(Optional). 

(1) 

Following the intended destination, 

insert the ICAO four

letter location identifier(s) of 

Preflight 

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