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before that Flight Level is reached, by means of oral instructions and, where
necessary, practical demonstrations, inform the passengers on the aircraft of:
(a) the location of, and manner of operating, the oxygen dispensing
equipment; and
(b) the necessity of using oxygen in the event of cabin depressurisation.
4.5 Where an aircraft is to operate above a cabin pressure altitude of Flight Level
140 a crew member must, before take-off of that aircraft, by means of oral
instructions and, where necessary, practical demonstrations, inform the
passengers on the aircraft of:
(a) the location of, and manner of operating, the oxygen dispensing
equipment; and
(b) when it is necessary to use the oxygen dispensing equipment.
5 INFORMATION TO BE INCLUDED IN OPERATIONS MANUAL AND
FLIGHT MANUAL
5.1 An operator must include in the operations manual required under regulation
215 of the Civil Aviation Regulations 1988 to be provided by the operator,
information relating to the following matters:
(a) the procedures to be followed in the operation of the oxygen systems in
the aircraft to which the operations manual relates;
(b) the methods of administering oxygen to passengers;
(c) the methods of determining, by observation of the equipment, that oxygen
is being supplied to dispensing units;
(d) the variation of the duration of the oxygen supply with varying cabin
pressure altitude and numbers of passengers;
(e) the conditions of operation under which crew members must use oxygen;
(f) the procedures for demonstrating the donning and use of oxygen masks by
passengers in accordance with paragraphs 4.4 and 4.5;
(g) schematic diagrams of the oxygen systems installed in the aircraft to
which the operations manual relates.
5.2 Where a flight manual for an aircraft does not contain information and
instructions relating to the matters referred to in subparagraphs 5.1 (a) and (c),
the owner or operator, as the case may be, of the aircraft must alter the flight
manual to include such information and instructions.
Issue 6: 8 December 2004
Amdt No. 206
SECTION 20.4 -4-
Issue 6
6 SUPPLEMENTAL OXYGEN REQUIREMENTS FOR UNPRESSURISED
AIRCRAFT
Supplemental oxygen for flight crew members
6.1 A flight crew member who is on flight deck duty in an unpressurised aircraft
must be provided with, and continuously use, supplemental oxygen at all times
during which the aircraft flies above 10 000 feet altitude.
6.2 A flight crew member must, in respect of any period during which the member
is not on flight deck duty, be provided with the amount of supplemental
oxygen that is provided to a crew member in accordance with paragraph 6.3.
Supplemental oxygen for other crew members
6.3 A crew member (not being a flight crew member on flight deck duty) in an
unpressurised aircraft must be provided with supplemental oxygen:
(a) in respect of any period exceeding 30 minutes during which the aircraft
flies between 10 000 feet altitude and Flight Level 120 (both inclusive);
and
(b) at all times during which the aircraft flies above Flight Level 120;
and must use supplemental oxygen at all times during which the aircraft flies
above Flight Level 140.
Supplemental oxygen for passengers
6.4 Where an unpressurised aircraft carrying passengers flies for more than 30
minutes above 10 000 feet altitude and up to and including Flight Level 140,
the aircraft must carry sufficient supplemental oxygen to supply:
(a) 10% of the passengers with oxygen for 30 minutes; or
(b) 20% of the passengers with oxygen for 15 minutes.
6.5 Where an unpressurised aircraft carrying passengers flies above Flight Level
140, the aircraft must carry sufficient supplemental oxygen to supply each
passenger with oxygen during all periods that the aircraft flies above Flight
Level 140.
7 SUPPLEMENTAL OXYGEN REQUIREMENTS FOR PRESSURISED
AIRCRAFT ENGAGED IN FLIGHTS NOT ABOVE FLIGHT LEVEL 250
Application
7.1 This subsection applies to pressurised aircraft that do not fly above Flight
Level 250.
Manner of calculating supplemental oxygen supply
7.2 In determining the amount of oxygen required to be carried on a pressurised
aircraft for the purposes of paragraphs 7.3, 7.4 and 7.5, an operator is to
determine that amount on the basis that:
(a) a cabin pressurisation failure will occur at a point on the planned route
which is most critical from the standpoint of oxygen need; and
Issue 6: 8 December 2004
Amdt No. 206
-5- SECTION 20.4
Issue 6
(b) after the failure, the aircraft will descend in accordance with the
emergency procedures specified in the aircraft’s flight manual (without
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