background image

AIM 

6/17/21 

7. 

TAAs may be modified from the standard size 

and shape to accommodate operational or ATC 
requirements. Some areas may be eliminated, while 
the other areas are expanded. The “T” design may be 
modified by the procedure designers where required 
by terrain or ATC considerations. For instance, the 
“T” design may appear more like a regularly or 
irregularly shaped “Y,” upside down “L,” or an “I.” 

(a) 

FIG 5

4

7 depicts a TAA without a left 

base leg and right base leg. In this generalized 
example, pilots approaching on a bearing TO the 
IF/IAF from 271 clockwise to 089 are expected to 
execute a course reversal because the amount of turn 
required at the IF/IAF exceeds 90 degrees. The term 
“NoPT” will be annotated on the boundary of the 
TAA icon for the other portion of the TAA. 

FIG 5

4

TAA with Left and Right Base Areas Eliminated 

(b) 

FIG 5

4

8 depicts another TAA modific-

ation that pilots may encounter. In this generalized 
example, the left base area and part of the straight-in 
area have been eliminated. Pilots operating within the 
TAA between 210 clockwise to 360 bearing TO the 
IF/IAF are expected to proceed direct to the IF/IAF 
and then execute the course reversal in order to 
properly align the aircraft for entry onto the 
intermediate segment or to avoid an excessive 
descent rate. Aircraft operating in areas from 001 
clockwise to 090 bearing TO the IF/IAF are expected 

to proceed direct to the right base IAF and not execute 
course reversal maneuver. Aircraft cleared direct the 
IF/IAF by ATC in this sector will be expected to 
accomplish HILTP. Aircraft operating in areas 091 
clockwise to 209 bearing TO the IF/IAF are expected 
to proceed direct to the IF/IAF and not execute the 
course reversal. These two areas are annotated 
“NoPT” at the TAA boundary of the icon in these 
areas when displayed on the approach chart’s plan 
view. 

Arrival Procedures 

5

4

14