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can move the aircraft out of the immediate vicinity of
another aircraft's wake vortex.
2. In domestic U.S. airspace, pilots must request clearance
to fly a lateral offset. Strategic lateral offsets flown in
oceanic airspace do not apply.
e. The FAA will track wake turbulence events as
an element of its post implementation program. The
FAA will advertise wake turbulence reporting
procedures to the operator community and publish
reporting procedures on the RVSM Documentation
Webpage (See address in paragraph 4-6-3, Aircraft
and Operator Approval Policy/Procedures, RVSM
Monitoring and Databases for Aircraft and Operator
Approval.
4-6-8. Pilot/Controller Phraseology
TBL 4-6-1 shows standard phraseology that pilots
and controllers will use to communicate in DRVSM
operations.
2/14/08 AIM
Operational Policy/Procedures for Reduced Vertical Separation Minimum (RVSM) in the 4-6-7
Domestic U.S., Alaska, Offshore Airspace and the San Juan FIR
TBL 4-6-1
Pilot/Controller Phraseology
Message Phraseology
For a controller to ascertain the RVSM approval status of
an aircraft:
(call sign) confirm RVSM approved
Pilot indication that flight is RVSM approved Affirm RVSM
Pilot report of lack of RVSM approval (non-RVSM status).
Pilot will report non-RVSM status, as follows:
Negative RVSM, (supplementary information,
e.g.,“Certification flight”).
a. On the initial call on any frequency in the RVSM
airspace and . . ..
b. In all requests for flight level changes pertaining to
flight levels within the RVSM airspace and . . ..
c. In all read backs to flight level clearances pertaining
to flight levels within the RVSM airspace and . . ..
d. In read back of flight level clearances involving
climb and descent through RVSM airspace
(FL 290 - 410).
Pilot report of one of the following after entry into RVSM
airspace: all primary altimeters, automatic altitude control
systems or altitude alerters have failed.
(See paragraph4-6-9, Contingency Actions: Weather
Encounters and Aircraft System Failures.)
NOTEThis
phrase is to be used to convey both the initial indication of
RVSM aircraft system failure and on initial contact on all
frequencies in RVSM airspace until the problem ceases to exist
or the aircraft has exited RVSM airspace.
Unable RVSM Due Equipment
ATC denial of clearance into RVSM airspace Unable issue clearance into RVSM airspace, maintain FL
*Pilot reporting inability to maintain cleared flight level
due to weather encounter.
(See paragraph 4-6-9, Contingency Actions: Weather
Encounters and Aircraft System Failures).
*Unable RVSM due (state reason) (e.g., turbulence,
mountain wave)
ATC requesting pilot to confirm that an aircraft has
regained RVSM-approved status or a pilot is ready to
resume RVSM
Confirm able to resume RVSM
Pilot ready to resume RVSM after aircraft system or
weather contingency
Ready to resume RVSM
AIM 2/14/08
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
4-6-9. Contingency Actions: Weather
Encounters and Aircraft System Failures
TBL 4-6-2 provides pilot guidance on actions to
takeunder certain conditions of aircraft system
failure and weather encounters. It also describes the
expected ATC controller actions in these situations. It
is recognized that the pilot and controller will use
judgment to determine the action most appropriate to
any given situation.
TBL 4-6-2
Contingency Actions: Weather Encounters and Aircraft System Failures
Initial Pilot Actions in Contingency Situations
Initial pilot actions when unable to maintain flight level (FL) or unsure of aircraft altitude-keeping
capability:
Notify ATC and request assistance as detailed below.
Maintain cleared flight level, to the extent possible, while evaluating the situation.
Watch for conflicting traffic both visually and by reference to TCAS, if equipped.
Alert nearby aircraft by illuminating exterior lights (commensurate with aircraft limitations).
Severe Turbulence and/or Mountain Wave Activity (MWA) Induced
Altitude Deviations of Approximately 200 feet
Pilot will: Controller will:
When experiencing severe turbulence and/or
MWA induced altitude deviations of
approximately 200 feet or greater, pilot will
contact ATC and state “Unable RVSM Due (state
reason)” (e.g., turbulence, mountain wave)
If not issued by the controller, request vector
clear of traffic at adjacent FLs
If desired, request FL change or re-route
　
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