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AIM 

6/17/21 

TBL 4

6

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: 

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). 

Negative RVSM, (supplementary information, 
e.g., “Certification flight”). 

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 Paragraph 4

6

9, Contingency Actions:  Weather 

Encounters and Aircraft System Failures that Occur After 
Entry into RVSM Airspace.) 

NOTE

 

This 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 that Occur After 
Entry into RVSM Airspace.). 

*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 

4

6

Operational Policy/Procedures for Reduced Vertical Separation Minimum (RVSM) in the 

Domestic U.S., Alaska, Offshore Airspace and the San Juan FIR