AIM
10/12/17
4
−
6
−
8
Operational Policy/Procedures for Reduced Vertical Separation Minimum (RVSM) in the
Domestic U.S., Alaska, Offshore Airspace and the San Juan FIR
Mountain Wave Activity (MWA) Encounters
−
General
Pilot actions:
Controller actions:
Contact ATC and report experiencing MWA
If so desired, pilot may request a FL change or
re
−
route
Report location and magnitude of MWA to ATC
Advise pilot of conflicting traffic at adjacent FL
If pilot requests, vector aircraft to avoid merging
target with traffic at adjacent RVSM flight levels,
traffic permitting
Issue FL change or re
−
route, traffic permitting
Issue PIREP to other aircraft
See paragraph 4
−
6
−
6 for guidance on MWA.
Paragraph 4
−
6
−
6 explains “traffic permitting.”
NOTE
−
MWA encounters do not necessarily result in altitude deviations on the order of 200 feet. The guidance below is
intended to address less significant MWA encounters.
Wake Turbulence Encounters
Pilot should:
Controller should:
Contact ATC and request vector, FL change or,
if capable, a lateral offset
Issue vector, FL change or lateral offset
clearance, traffic permitting
See Paragraph 4
−
6
−
7, Guidance on Wake
Turbulence.
Paragraph 4
−
6
−
6 explains “traffic permitting.”
“Unable RVSM Due Equipment”
Failure of Automatic Altitude Control System, Altitude Alerter or All Primary Altimeters
Pilot will:
Controller will:
Contact ATC and state “Unable RVSM Due
Equipment”
Request clearance out of RVSM airspace unless
operational situation dictates otherwise
Provide 2,000 feet vertical separation or
appropriate horizontal separation
Clear aircraft out of RVSM airspace unless
operational situation dictates otherwise
One Primary Altimeter Remains Operational
Pilot will:
Controller will:
Cross check stand
−
by altimeter
Notify ATC of operation with single primary
altimeter
If unable to confirm primary altimeter accuracy,
follow actions for failure of all primary altimeters
Acknowledge operation with single primary
altimeter