STC SP04490AT

SP04490AT Sensenich Propeller Company 2008 Wood Court Plant City, FL 33563 Part 23 Federal Aviation Regulations 1A2 Piper See page 4 of 5 on continuation sheet.

Installation of Sensenich propeller model 2G0M8/C82BGF:

1.in accordance with Sensenich drawing C-2588, 2G0M8 C82BG Series Assembly, revision 0, or later FAA approved revision, and Sensenich document PA-18-150 2G0Mx C82BGF Installation Instructions Rev0, or later FAA accepted revision, containing Instructions for Continued Airworthiness and approved Airworthiness Limitations;

2.onto airplane models listed above modified with Lycoming O-360 or IO-360 engines (rated at a maximum continuous power output of 180 horsepower at 2700 RPM at sea level) and a fixed pitch or ground adjustable propeller. To provide adequate ground clearance for the propeller, the aircraft shall be equipped with at least one of the following: A) STC approved landing gear extended 3 or more inches from original type design, B) an approved wheel and tire set that provide at least 9 and 3/8 inches between the ground and center of the wheel axle. Specified configurationshall be in accordance with Piper TCDS 1A2 or FAA approved or validated supplemental type certificates.

(Continued on page 3 of 5.)

See page 4 of 5.

October 30, 2019 September 27, 2023 January 7, 2021 February 25, 2022 5 (for) Christina M. Underwood Manager, East Certification Branch

Date o transfer:

SP04490AT 5

8 8 8 78 SP04490AT 3 5

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number: SP04490AT Model:

PA-18, -18S, -18 "105," -18S "105," -18A, -18 "125," -18S "125," -18AS "125," -18 "135," -18A "135," -18S "135," -18AS "135," -18 "150," -18A "150," -18S "150," -18AS "150," -19, -19S, L-18C, L-21A, L-21B Limitations and Conditions:

1. Approval of this change in type design applies to the above make and model aircraftonly and reclassifies the aircraft as level 1 and low speed per 14 CFR 23.2005.

2. This approval should not be extended to other aircraft of these models on which other previously approved modifications are incorporated unless it is determined the relationship between this change and any of those previously approved modifications, including changes in type design, will introduce no adverse effect upon the airworthiness of the aircraft.

3. This STC does not constitute a standalone propeller approval.

4. A copy of this certificate and Sensenich document PA-18-150 2G0Mx C82BGF Installation Instructions Rev0, or later FAA approved revision, must be maintained as part of the permanent records for the modified aircraft.

5. If the holder agrees to permit another person to use this certificate to alter the product, the holder shall give the other person written evidence of that permission.

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number: SP04490AT Certification Basis CAR Part 3, as amended to November 1, 1949;

14 CFR 23, amd 64, sections 23.1529, 23.2000, 23.2005, 2010, A23.1, A23.3, A23.3, A23.4; and, for propeller approval and installation aspects only: replace 3.81 with 23.2105, 3.84 with 23.2115(a)(3) and 3.416 with 23.2400(b) and (e).

The accepted propeller standards per §23.2400(b) are ASTM F2506-13, sections 1.1,

1.2, 1.3, 1.4, 4.1, 4.3, 4.4, 5.1, 5.2, 5.3, 5.5, 6.1, 6.2, 6.3, 6.4, 6.5, 6.6, 8.1, and 9.1, and 14 CFR 35, amd 10, sections 35.15, 35.35(c), 35.36, and 35.38.

Production Basis: Production Certificate No. 335ce ----------------END---------------- 5 5