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AIM

3/29/18

Explanation of Changes

E of Chg

−2

j. 5

−2−2. Automated Pre−Departure Clearance

Procedures

This change revises the logon procedure for
automated pre

−departure clearance procedures via

Controller Pilot Data Link Communications

−Depar-

ture Clearance (CPDLC

−DCL).

k. 5

−4−13. ILS Approaches to Parallel

Runways

5

−4−14. Parallel ILS Approaches

(Dependent)

5

−4−15. Simultaneous (Parallel)

Independent ILS/RNAV/GLS Approaches

5

−4−16. Simultaneous Close Parallel ILS

PRM/RNAV PRM/GLS PRM Approaches and
Simultaneous Offset Instrument Approaches
(SOIA)

This change incorporates updates to the design of
simultaneous approaches that have been instituted,
including revising the No Transgression Zone
relative to simultaneous close parallel approaches. In
addition, the use of different types of approaches for
simultaneous operations has been made more
inclusive. The PRM pilot training video has been

replaced with a new slide presentation which contains
numerous items not presently addressed in the AIM,
including a reformatted Attention All Users Page.

l. 7

−1−14. ATC Inflight Weather Avoidance

Assistance

After testing and evaluation, the Weather and Radar
Processor (WARP) Program Office, AJM

−33, in

conjunction with the Weather Engineering Team,
AJW

−176, discovered that 26 dBZ is the optimum

Moderate threshold for the Selectable Mosaic
Generator (SMG), as opposed to 30 dBZ. Therefore,
this change adjusts the threshold for “LIGHT” to
(<26 dBZ) and “MODERATE” to (26 to 40 dBZ) to
comply with those findings.

m. 7

−5−13. Flying in Flat Light and White Out

Conditions

This change adds Brown Out conditions to the AIM
to align with other published guidance.

n. Entire publication.

Editorial/format changes were made where neces-
sary. Revision bars were not used when changes are
insignificant in nature.