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plans that include flight in Domestic U.S. RVSM
airspace must file “/W” in block 10 to indicate RVSM
authorization.
38.4.5 Importance of Flight Plan Equipment
Suffixes. The operator must file the appropriate
equipment suffix in the equipment block of the FAA
Flight Plan (FAA Form 7233−1) or the ICAO Flight
Plan. The equipment suffix informs ATC:
38.4.5.1 Whether or not the operator and aircraft are
authorized to fly in RVSM airspace.
38.4.5.2 The navigation and/or transponder
capability of the aircraft (e.g., advanced RNAV,
Transponder with Mode C).
31 JULY 08
AIP ENR 1.1−49
United States of America 15 MAR 07
Federal Aviation Administration Nineteenth Edition
38.4.6Significant ATC uses of the flight plan
equipment suffix information are:
38.4.6.1To issue or deny clearance into RVSM
airspace.
38.4.6.2To apply a 2,000 foot vertical separation
minimum in RVSM airspace to aircraft that are not
authorized for RVSM, but are in one of the limited
categories that the FAA has agreed to accommodate.
(See paragraphs 38.10, Procedures for Accommodation
of Non−RVSM Aircraft, and 38.11, Non−RVSM
Aircraft Requesting Climb to and Descent from
Flight Levels Above RVSM Airspace Without
Intermediate Level Off, for policy on limited
operation of unapproved aircraft in RVSM airspace).
38.4.6.3To determine if the aircraft has Advanced
RNAV" capabilities and can be cleared to fly
procedures for which that capability is required.
38.5Pilot RVSM Operating Practices and
Procedures
38.5.1RVSM Mandate.If either the operator or
the aircraft or both have not received RVSM
authorization (non−RVSM aircraft), the pilot will
neither request nor accept a clearance into RVSM
airspace unless:
38.5.1.1The flight is conducted by a non−RVSM
DOD, Lifeguard, certification/development or foreign
State (government) aircraft in accordance with
paragraph 38.10, Procedures for Accommodation of
Non−RVSM Aircraft.
38.5.1.2The pilot intends to climb to or descend
from FL 430 or above in accordance with
paragraph38.11, Non−RVSM Aircraft Requesting
Climb to and Descent from Flight Levels Above
RVSM Airspace Without Intermediate Level Off.
38.5.1.3An emergency situation exists.
38.5.2Basic RVSM Operating Practices and
Procedures.Appendix 4 of Guidance 91−RVSM
contains pilot practices and procedures for RVSM.
Operators must incorporate Appendix 4 practices and
procedures, as supplemented by the applicable
paragraphs of this section, into operator training or
pilot knowledge programs and operator documents
containing RVSM operational policies. Guidance
91−RVSM is published on the RVSM Documentation
Webpage under Documents Applicable to
All RVSM Approvals."
38.5.3Appendix 4 contains practices and procedures
for flight planning, preflight procedures at the
aircraft, procedures prior to RVSM airspace entry,
inflight (en route) procedures, contingency procedures
and post flight.
38.5.4The following paragraphs either clarify or
supplement Appendix 4 practices and procedures.
38.6Guidance on Severe Turbulence and
Mountain Wave Activity (MWA)
38.6.1Introduction/Explanation
38.6.1.1The information and practices in this
paragraph are provided to emphasize to pilots and
controllers the importance of taking appropriate
action in RVSM airspace when aircraft experience
severe turbulence and/or MWA that is of sufficient
magnitude to significantly affect altitude−keeping.
38.6.1.2Severe Turbulence.Severe turbulence
causes large, abrupt changes in altitude and/or
attitude usually accompanied by large variations in
indicated airspeed. Aircraft may be momentarily out
of control. Encounters with severe turbulence must
be remedied immediately in any phase of flight.
Severe turbulence may be associated with MWA.
38.6.1.3Mountain Wave Activity (MWA)
a)Significant MWA occurs both below and above
the floor of RVSM airspace, FL 290. MWA often
occurs in western states in the vicinity of mountain
ranges. It may occur when strong winds blow
perpendicular to mountain ranges resulting in up and
down or wave motions in the atmosphere. Wave
action can produce altitude excursions and airspeed
fluctuations accompanied by only light turbulence.
With sufficient amplitude, however, wave action can
induce altitude and airspeed fluctuations accompanied
by severe turbulence. MWA is difficult to
forecast and can be highly localized and short lived.
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