Installed Oxygen System System description Limitations Normal Procedures Emergency Procedures

Oxygen System 77 Cubic foot tank installed in the aft tail section Service through the baggage compartment. O2 line is plumbed above the headliner to the distribution manifold Control panel/annunciator panel is mounted on center console just left of the flap lever Master switch Fault annunciation Quantity indication (tank pressure) Distribution quantity indication (pressure to distribution manifold)

Oxygen Limitations Cannulas are certified up to FL180 as per FAR part 23. Oxygen masks are required above FL180 FAR 91.211 requires the use of O2 below the aircraft maximum certified altitude. Above12,500 MSL for more the 30 minutes or, Anytime above 14,000 MSL Make available for passengers above 15,000 MSL Note: The O2 Required light will illuminate when the aircraft has reached a pressure altitude of 12,000 feet and the system is off

Duration Table Based on a 77 cu ft tank Residual oxygen below FL200 is not factored into duration table Includes additional 5% safety margin What is the oxygen duration for a flight at FL190 with 2 persons aboard? See speaker notes for answer Approximately 6 hours and 30 minutes.

Normal Procedures Before Starting Engine Climb Brief passengers on the use of O2 Make sure masks/cannulas are readily available in-flight Climb Don masks/cannulas prior to reaching altitudes that require O2 Oxygen System On Flowmeter adjust for final cruise altitude or to maintain O2 saturation levels above 90% when using a pulse oximeter

Normal Procedures Cruise Descent Oxygen quantity check every 20 minutes Oxygen pressure check every 20 minutes Oxygen saturation level check every 20 minutes Descent Oxygen off after descending through altitudes that do not require the use of oxygen Stow mask/cannulas

Emergency Procedures Cabin Fire and Smoke/Fume Elimination Use of O2 during a cabin fire can pose a serious threat. Turn O2 off and descend to an altitude that does not require the use of oxygen Pilot must use good judgment and weigh the risks between use of O2 during a cabin fire and the affects of hypoxia Oxygen System Malfunction Check flow meters for flow Descent below 10,000MSL or MSA O2 system off

Emergency Procedures Steady Fault Light Flashing Fault Light Indicates a wiring problem and the system is disabled Cycle Oxygen / Cabin Lights C/B Flashing Fault Light Indicates oxygen pressure fault to the distribution manifold. Descend to an altitude where oxygen is not required

Time of Useful Consciousness Symptoms of Hypoxia Treat hypoxia with 100% oxygen. It is a possible emergency if no oxygen is available and you are hypoxic. Declare emergency Execute an immediate emergency descent to 10,000 or MSA whichever appropriate. Note: the useful consciousness time from 18,000 to 25,000 Time of Useful Consciousness FL180 20-30 minutes FL220 8-10 minutes FL250 3-5 minutes FL300 1-2 minutes FL350 30-60 seconds FL430 9-12 seconds FL500 and above

Pulse Oximeter Measures blood oxygen saturation level. Increase the flow of O2 if saturation levels drop below 90% Descent to a lower altitude if saturation levels can not be kept above 90%

Scenario While using a cannula at 17,500MSL, you engage in an interesting conversation with your passengers. Shortly after, you experience shortness of breath and notice minor cyanosis in your finger tips. Oxygen flow is adequate. What is the problem? See speaker notes for the answer The source of oxygen while using a cannula is through the nose. While talking or eating most likely you are breathing through you mouth and the oxygen available in not reaching your lungs. Stop talking for a while and start breathing through your nose.