Section 49.1 - Applicability(a) This part applies to the recording of certain conveyances affecting title to, or any interest in- (1) Any aircraft registered under 49 U.S.C. 44101-44104 ;(2) Any specifically identified aircraft engine of 550 or more rated takeoff horsepower, or the equivalent of that horsepower;(3) Any specifically identified aircraft propeller able to absorb 750 or more rated takeoff shaft horsepower; and(4) Any aircraft engine, propeller, or appliance maintained by or for an air carrier certificated under 49 U.S.C. 44705 , for installation or use in an aircraft, aircraft engine, or propeller, or any spare part, maintained at a designated location or locations by or for such an air carrier.(b) Subpart B of this part governs, where applicable by its terms, conveyances subject to this part.Doc. No. 1996, 29 FR 6486, May 19, 1964, as amended by Amdt. 49-10, 70 FR 246 , Jan. 3, 2005; Amdt. No. 49-11, 87 FR 75711 , Dec. 9, 2022 Amdt. No. 49-11, 87 FR 75711 , 12/9/2022