O2 Cylinders

Question 1

What are the two main systems within the O2 system

Answer 1

1. pilot system supplies pilot and flight engineers regulators
2. copilot system supplies the copilot, navigator, radioman, and cargo compartment regulators

Question 2

Cylinder systems

Answer 2

1. pilot and flight engineer regulators use a 2 cylinder system
2. all other regulators use a 5 cylinder system

Question 3

Cylinder installation

Answer 3

wrap threads of coupling with anti-seize tape, do not wrap on first 2 threads of fitting nearest opening.

tighten until bottoming then tighten additional 1/6 turn

Question 4

Replacement of drying agent cartridge is required after how many cylinders have been used IAW Oxygen Servicing Trailer Manual AFTO 35D3-6-48-1.

Answer 4

16

CGTO PG-85-00-310A P. 5-2

Question 5

HC-130 and HU-25 used what type pressure bottles

Answer 5

HC-130 low pressure 50-500 PSIG
HU-25 high pressure 50-1850 PSIG

M13520.1C 5-15

Question 6

Warning and safety precautions for O2 systems

Answer 6

1. connect a/c to ground before operations
2. disconnect external electrical power from a/c, place battery switch to off, and tag with danger tag.
3. use only MIL-PRF-27210 type 1 aviators breathing O2 for filling and purging
4. clean body, clothes, ppe from petroleum products(hair oil)
5. do not allow O2 to mix with other vapors such as fuel fumes
6. area is venilated
7. keep O2 away from sources of heat, exhaust, flames, sparks, smoking
8. air out clothing afterwards