Aeronautical Information Manual (AIM), page 349

Index   348 -- Page 349 -- 350

7. TAAs may be modified from the standard size (a) FIG 5-4-6 depicts a TAA without a left
and shape to accommodate operational or ATC re- base leg and right base leg. In this generalized ex-
quirements. Some areas may be eliminated, while the ample, pilots approaching on a bearing TO the IF/IAF
other areas are expanded. The "T" design may be from 271 clockwise to 089 are expected to execute a
modified by the procedure designers where required course reversal because the amount of turn required
by terrain or ATC considerations. For instance, the at the IF/IAF exceeds 90 degrees. The term "NoPT"
"T" design may appear more like a regularly or irreg- will be annotated on the boundary of the TAA icon for
ularly shaped "Y," upside down "L," or an "I." the other portion of the TAA.

FIG 5-4-6
TAA with Left and Right

(b) FIG 5-4-7 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 prop-
erly align the aircraft for entry onto the intermediate
segment or to avoid an excessive descent rate. Air-
craft operating in areas from 001 clockwise to 090

Base Areas Eliminated

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 bear-
ing 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 ap-
proach chart's plan view.

Arrival Procedures 5-4-13

Page 349 of the Aeronautical Information Manual (AIM.pdf)
AIM: Official Guide to Basic Flight Information and ATC Procedures

Index   348 -- Page 349 -- 350