[Code of Federal Regulations]

[Title 14, Volume 2]

[Revised as of January 1, 2006]

From the U.S. Government Printing Office via GPO Access

[CITE: 14CFR135.89]



[Page 750-751]

 

                     TITLE 14--AERONAUTICS AND SPACE

 

CHAPTER I--FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION 

                               (CONTINUED)

 

PART 135_OPERATING REQUIREMENTS: COMMUTER AND ON DEMAND OPERATIONS 

AND RULES GOVERNING PERSONS ON BOARD SUCH AIRCRAFT--Table of Contents

 

                       Subpart B_Flight Operations

 

Sec. 135.89  Pilot requirements: Use of oxygen.



    (a) Unpressurized aircraft. Each pilot of an unpressurized aircraft 

shall use oxygen continuously when flying--

    (1) At altitudes above 10,000 feet through 12,000 feet MSL for that 

part of the flight at those altitudes that is of more than 30 minutes 

duration; and

    (2) Above 12,000 feet MSL.

    (b) Pressurized aircraft. (1) Whenever a pressurized aircraft is 

operated with the cabin pressure altitude more than 10,000 feet MSL, 

each pilot shall comply with paragraph (a) of this section.

    (2) Whenever a pressurized aircraft is operated at altitudes above 

25,000 feet through 35,000 feet MSL, unless each



[[Page 751]]



pilot has an approved quick-donning type oxygen mask--

    (i) At least one pilot at the controls shall wear, secured and 

sealed, an oxygen mask that either supplies oxygen at all times or 

automatically supplies oxygen whenever the cabin pressure altitude 

exceeds 12,000 feet MSL; and

    (ii) During that flight, each other pilot on flight deck duty shall 

have an oxygen mask, connected to an oxygen supply, located so as to 

allow immediate placing of the mask on the pilot's face sealed and 

secured for use.

    (3) Whenever a pressurized aircraft is operated at altitudes above 

35,000 feet MSL, at least one pilot at the controls shall wear, secured 

and sealed, an oxygen mask required by paragraph (b)(2)(i) of this 

section.

    (4) If one pilot leaves a pilot duty station of an aircraft when 

operating at altitudes above 25,000 feet MSL, the remaining pilot at the 

controls shall put on and use an approved oxygen mask until the other 

pilot returns to the pilot duty station of the aircraft.