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AIM 

6/17/21 

b.  Explanation of Items Filed in FAA Form 

7233

Procedures and other information provided in this 
section are designed to assist operators using FAA 
Form 7233

4 to file IFR flight plans for flights that 

will be conducted entirely within U.S. domestic 
airspace.  Requirements and procedures for operating 
outside U.S. domestic airspace may vary significant-
ly from country to country. It is, therefore, 
recommended that operators planning flights out-
side U.S. domestic airspace become familiar with 
applicable international documents, including Aero-
nautical Information Publications (AIP); and ICAO 
Document 4444, Procedures for Air Navigation 
Services/Air Traffic Management, Appendix 2. 

NOTE

 

FAA Form 7233

4 is shown in FIG 5

1

3. The filer is 

normally responsible for providing the information 
required in Items 3 through 19. 

1.  Item 7.  Aircraft Identification.

 Insert the 

full registration number of the aircraft, or the 
approved FAA/ICAO company or organizational 
designator, followed by the flight number. 

EXAMPLE

 

N235RA, AAL3342, BONGO33 

NOTE

 

Callsigns filed in this item must begin with a letter followed 
by 1

6 additional alphanumeric characters. 

2.  Item 8.  Flight Rules and Type of Flight. 

(a)  Flight Rules. 

Insert the character “I” to 

indicate IFR 

(b) Type of Flight. 

Insert one of the 

following letters to denote the type of flight: 

(1)  S

 if scheduled air service 

(2)  N

 if non

scheduled air transport 

operation 

(3)  G

 if general aviation 

(4)  M

 if military 

(5)  X

 if other than any of the defined 

categories above. 

NOTE

 

Type of flight is optional for flights that will be conducted 
entirely within U.S. domestic airspace. 

3.  Item 9.  Number, Type of Aircraft, and 

Wake Turbulence Category. 

(a)  Number. 

Insert the number of aircraft, if 

more than 1 (maximum 99). 

(b)  Type of Aircraft. 

(1) 

Insert the appropriate designator as 

specified in ICAO Doc 8643, Aircraft Type 
Designators; 

(2) 

Or, if no such designator has been 

assigned, or in the case of formation flights consisting 
of more than one type; 

(3) 

Insert ZZZZ, and specify in Item 18, the 

(numbers and) type(s) of aircraft preceded by TYP/. 

(c)  Wake Turbulence Category. 

Insert an 

oblique stroke followed by one of the following 
letters to indicate the wake turbulence category of 
the aircraft: 

(1) 

H — HEAVY, to indicate an aircraft 

type with a maximum certificated takeoff weight of 
300,000 pounds (136 000 kg), or more; 

(2) 

M — MEDIUM, to indicate an aircraft 

type with a maximum certificated takeoff weight of 
less than 300,000 pounds (136,000 kg), but more than 
15,500 pounds (7,000 kg); 

(3) 

L — LIGHT, to indicate an aircraft type 

with a maximum certificated takeoff weight of 
15,500 pounds (7,000 kg) or less. 

4.  Item 10.  Equipment 

5

1

18 

Preflight