[Code of Federal Regulations] [Title 14, Volume 2] [Revised as of January 1, 2008] From the U.S. Government Printing Office via GPO Access [CITE: 14CFR125.137] [Page 992] TITLE 14--AERONAUTICS AND SPACE CHAPTER I--FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION (CONTINUED) PART 125_CERTIFICATION AND OPERATIONS: AIRPLANES HAVING A SEATING CAPACITY OF Subpart E_Special Airworthiness Requirements Sec. 125.137 Oil valves. (a) Each oil valve must-- (1) Comply with Sec. 125.155; (2) Have positive stops or suitable index provisions in the ``on'' and ``off'' positions; and (3) Be supported so that loads resulting from its operation or from accelerated flight conditions are not transmitted to the lines attached to the valve. (b) The closing of an oil shutoff means must not prevent feathering the propeller, unless equivalent safety provisions are incorporated.