Document ID: chunk:federal_register_of_legislation:F2005B00649:body:0:p4
Version: federal_register_of_legislation:F2005B00649
Segment Type: other
Provision Reference: 
Character Range: 7749–10567

The pilot in command of an aircraft proposing to enter Class A / RVSM airspace must, while in flight and within a reasonable time before entering that airspace, check whether the essential RVSM equipment of the aircraft is functioning properly.

       2 Entry into Class A / RVSM airspace — aircraft with essential RVSM equipment not functioning properly

       2.1 If the pilot in command of an aircraft proposing to enter Class A / RVSM airspace finds in flight that any essential RVSM equipment of the aircraft is not functioning properly, he or she must:
           (a) notify ATC accordingly; and
           (b) may enter that airspace only in accordance with a clearance given by ATC after it has been so notified.

   3 Change of flight level

       3.1 If the pilot in command of an aircraft moves from one flight level to another while the aircraft is flying in Class A / RVSM airspace, he or she must not overshoot, or undershoot, the flight level to which the aircraft is moving by more than 150 feet or (if the aircraft's essential RVSM equipment uses the metric system) 45 metres.

   4 Only one primary altitude measurement system functioning properly

       4.1 If an aircraft flying in Class A / RVSM airspace has only one of its primary altitude measurement systems functioning properly, the pilot in command of the aircraft may continue to use that airspace, but he or she must:
           (a) couple that system with the aircraft's automatic altitude control system; and
           (b) notify ATC of the situation by using the words "For information operating on one primary altimeter only"; and
           (c) monitor the altitude of the aircraft more often than normally required.

   5 Failure of both primary altitude measurement systems

       5.1 If both primary altitude measurement systems of an aircraft flying in Class A / RVSM airspace have stopped functioning properly, the pilot in command may continue to use that airspace but must:
           (a) if the aircraft is also equipped with an independent altitude measurement system that is not a primary altitude measurement system (a stand-by altimeter) — maintain the altitude indicated by the stand-by altimeter when the last of the primary altitude measurement systems stopped functioning properly; and
           (b) turn on all the exterior lights of the aircraft; and
           (c) if the aircraft is not using VHF to communicate with ATC — broadcast on 121.5 MHz the aircraft's position and flight level and the pilot's proposed course of action; and
           (d) notify ATC of the systems' failure and the pilot's proposed course of action.

       5.2  If the aircraft is flying in an oceanic control area and its pilot in command has not, within a reasonable time, obtained directions from ATC, he or she must: