RNAV (GPS) to IAF with more than 90 degrees?

[summerjim]

Can an RNAV (GPS) approach clearance be given to an IAF with an angle at more than 90 degrees? The 7110 (section 4-8-1) is specific about an intermediate fix not being at an angle more than 90 degrees, but what about an IAF? Does it matter if the approach plate has a TAA?

 

[genot]

No it cannot. To the IAF specifically intercept rules within distance to the approach gate would apply AFAIK.

 

[FM_Weasel]

How about 4-8-1 b. 3.

3. Established on a heading or course that will
intercept the initial segment at the initial approach fix,
or intermediate segment at the intermediate fix when
no initial approach fix is published, for a GPS or
RNAV instrument approach procedure at an angle not
greater than 90 degrees. Angles greater than
90 degrees may be used when a hold in lieu of
procedure turn pattern is depicted at the fix for the
instrument approach procedure. (See FIG 4-8-2.)

And the following examples in the book along with the accompanying figure 4-8-2 which shows the IAF "CENTR" and states that you may only clear an aircraft direct CENTR for the approach if the angle is less than 90 degrees, UNLESS the aircraft is allowed to execute a procedure turn (which, in this case, is depicted at CENTR).

4-8-1 b. 4 (f) discusses approaches to an intermediate fix, and restates the 90 degree maximum intercept angle, but it doesn't override the earlier paragraph's requirement to ensure less than 90 degrees when clearing to the IAF as well.

So yes, 90 degrees is required with clearance to either an IAF or IF. Clearance from within a TAA is also fine, but I think you'll find many of those are depicted in such a way that the turn is less than 90 degrees anyway.