| Circumstances |
Phraseologies |
|
. . . to ascertain RVSM approval status of an aircraft |
CONFIRM RVSM APPROVED |
|
. . . to report RVSM approved status |
AFFIRM RVSM |
|
. . . to report RVSM non-approved status followed by supplementary information |
NEGATIVE RVSM [(supplementary information, e.g. State Aircraft)]
Note 1. - During operations in or vertical transit through RVSM airspace with aircraft not approved for RVSM operations, pilots shall report non-approved status as follows:
a) at initial call on any channel within RVSM airspace;
b) in all requests for level changes; and
c) in all read-backs of level clearances.
Note 2. - Air traffic controllers shall explicitly acknowledge receipt of messages from aircraft reporting RVSM non-approved status. |
|
. . . to deny ATC clearance into RVSM airspace |
UNABLE ISSUE CLEARANCE INTO RVSM AIRSPACE, MAINTAIN [or DESCEND TO, or CLIMB TO] (level) |
|
. . . to report when severe turbulence affects the capability of an aircraft to maintain height-keeping requirements for RVSM |
UNABLE RVSM DUE TURBULENCE |
|
. . . to report that the equipment of an aircraft has degraded below minimum aircraft system performance specifications (MASPS) |
UNABLE RVSM DUE EQUIPMENT |
|
. . . to request an aircraft to provide information as soon as RVSM-approved status has been regained or the pilot is ready to resume RVSM operations |
REPORT WHEN ABLE TO RESUME RVSM |
|
. . . to request confirmation that an aircraft has regained RVSM-approved status or a pilot is ready to resume RVSM operations |
CONFIRM ABLE TO RESUME RVSM |
|
. . . to report ability to resume RVSM operations after an equipment or weather-related contingency |
READY TO RESUME RVSM |
