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AIM

10/12/17

5−4−11

Arrival Procedures

3. The standard TAA based on the “T” design

consists of three areas defined by the Initial Approach

Fix (IAF) legs and the intermediate segment course

beginning at the IF/IAF. These areas are called the

straight−in, left−base, and right−base areas. (See

FIG 5−4−4). TAA area lateral boundaries are

identified by magnetic courses TO the IF/IAF. The

straight−in area can be further divided into

pie−shaped sectors with the boundaries identified by

magnetic courses TO the (IF/ IAF), and may contain

stepdown sections defined by arcs based on RNAV

distances from the IF/IAF. (See FIG 5−4−5). The

right/left−base areas can only be subdivided using

arcs based on RNAV distances from the IAFs for

those areas.

FIG 5−4−4

TAA Area

4. Entry from the terminal area onto the

procedure is normally accomplished via a no

procedure turn (NoPT) routing or via a course

reversal maneuver. The published procedure will be

annotated “NoPT” to indicate when the course

reversal is not authorized when flying within a

particular TAA sector. Otherwise, the pilot is

expected to execute the course reversal under the

provisions of 14 CFR Section 91.175. The pilot may

elect to use the course reversal pattern when it is not

required by the procedure, but must receive clearance

from air traffic control before beginning the

procedure.

(a) ATC should not  clear an aircraft to the left

base leg or right base leg IAF within a TAA at an

intercept angle exceeding 90 degrees. Pilots must not

execute the HILPT course reversal when the sector or

procedure segment is labeled “NoPT.”

(b) ATC may clear aircraft direct to the fix

labeled IF/IAF if the course to the IF/IAF is within the

straight-in sector labeled “NoPT” and the intercept

angle does not exceed 90 degrees. Pilots are expected

to proceed direct to the IF/IAF and accomplish a

straight-in approach. Do not execute HILPT course

reversal. Pilots are also expected to fly the straight−in

approach when ATC provides radar vectors and

monitoring to the IF/IAF and issues a “straight-in”

approach clearance; otherwise, the pilot is expected to

execute the HILPT course reversal.

REFERENCE−

AIM, Paragraph 5−4−6 , Approach Clearance

(c) On rare occasions, ATC may clear the

aircraft for an approach at the airport without

specifying the approach procedure by name or by a

specific approach (for example, “cleared RNAV

Runway 34 approach”) without specifying a

particular IAF. In either case, the pilot should proceed