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AIM

10/12/17

5−4−8

Arrival Procedures

4. When parallel approach courses are less than 2500 feet
apart and reduced in-trail spacing is authorized for
simultaneous dependent operations, a chart note will
indicate that simultaneous operations require use of
vertical guidance and that the pilot should maintain last
assigned altitude until established on glide slope.  These
approaches procedurally require utilization of the ILS
glide slope for wake turbulence mitigation. Pilots should
not confuse these simultaneous dependent operations with
(SOIA) simultaneous close parallel PRM approaches,
where PRM appears in the approach title.

5. Altitude restrictions depicted at stepdown

fixes within the final approach segment are

applicable only when flying a Non−Precision

Approach to a straight−in or circling line of minima

identified as a MDA(H). Stepdown fix altitude

restrictions within the final approach segment do not

apply to pilots using Precision Approach (ILS) or

Approach with Vertical Guidance (LPV, LNAV/

VNAV) lines of minima identified as a DA(H), since

obstacle clearance on these approaches are based on

the aircraft following the applicable vertical

guidance. Pilots are responsible for adherence to

stepdown fix altitude restrictions when outside the

final approach segment (i.e., initial or intermediate

segment), regardless of which type of procedure the

pilot is flying. (See FIG 5−4−1.)

FIG 5−4−1

Instrument Approach Procedure Stepdown Fixes