Document ID: chunk:federal_register_of_legislation:F2005B00649:body:0:p5
Version: federal_register_of_legislation:F2005B00649
Segment Type: other
Provision Reference: 
Character Range: 10331–13002

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:
           (a) if there is no adjacent track to the right or to the left of the aircraft's assigned track — cause the aircraft to leave its assigned track by turning 900 to the right or to the left (as the case may be) and then descend below flight level 290; or
           (b) if he or she cannot take action in accordance with paragraph (a) — continue to comply with paragraphs 5.1 (a) to (d) until he or she obtains directions from ATC.

       6 Marked difference between altitudes indicated by primary altitude measurement systems

       6.1 If there is a difference of more than 200 feet between the altitudes indicated by the primary altitude measurement systems of an aircraft flying in Class A / RVSM airspace, the pilot in command of the aircraft must try to find out, through established methods, which of the systems is functioning properly.

       6.2 If the pilot in command of the aircraft finds out which system is functioning properly, he or she may continue to use that airspace but must comply with section 4.

       6.3 If the pilot in command is unable to find out which of the systems is functioning properly:
           (a) both systems must be taken to have stopped functioning properly; and
 (b) the pilot in command of the aircraft must comply with section 5.

   7 Failure of automatic altitude control systems

       7.1 If the automatic altitude control system of an aircraft, or (in the case of an aircraft that has more than one automatic altitude control system) all the automatic altitude control systems of the aircraft, stop functioning properly while the aircraft is flying in Class A / RVSM airspace, the pilot in command of the aircraft must:
           (a) try to maintain the cleared flight level for the aircraft through manual control of the aircraft's altitude; and
           (b) assess whether he or she can so maintain the cleared flight level for the remainder of the flight in Class A / RVSM airspace; and
           (c) if he or she is unable to maintain the cleared flight level for the aircraft — find out whether the aircraft is likely to fly close to the flight path of any other aircraft; and
           (d) turn on all the exterior lights of the aircraft; and
           (e) 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 cause of action; and
           (f) notify ATC