STC SA1231NW

United State of amme Department of Transportation Federal Aviation Administration Supplemental Type Certificate Number: SA123INW

• sees certificate ind he Steven L. Knopp Certifies that the change in the type design for the felling frauct with the limitations and conditions the refer as specifed heren meets the ni ince requirements Purt Purt of the Civil Air Heyulationd, November 1, 1949, and amendments 3-1 through 3-8.

Original Product -Typebertificates Lunder: 5A6

- Matie Cessna Mantel. 180 escriptin/lype Leign Change, Installation of a Continental 0-470-R engine, McCauley 2A36C29A/90M-8 propeller and associated systems in accordance with Steven L. Knopp photographs 1 through 5.

Limitiniandlundilina: Data pertaining to this modification are considered inadequate for duplication in other aircraft. This approval is limited to the installation in Cessna 180, Serial Number 31348 only. A copy of this Certificate and Addendum No. SA1231NW shall be maintained as part of the permanent records for the modified aircraft.

Date of Application: . March 18, 1981 Dad / womano May 13, 1981 Date Amended:

¡IDERAL EVIATION DENature TOHIMISTRANO Acting Chief, Seattle Area Aircraft Certification Office Titles

FAA For 8110-2 (10-68)

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Shect) May 13, 1981 Number SA1231NW Supplemental Type Certificate ADDENDUM NO. SA1231NW The conditions and limitations of Type Certificate Data Sheet Number 5A6 apply except where superseded by the following:

Supplemental Type Certificate Data Sheet, which is part of STC SA1231NW, prescribes the conditions and limitations under which the product for which the STC was issued meets the airworthiness requirements of the Civil Air Regulations.

Supplemental Type Certificate HOLDER: Steven L. Knopp CESSNA MODEL 180, 4PCL-SM, (NORMAL CATEGORY) AS MODIFIED BY STC SA1231NW Engine: Continental 0-470-R Fuel: 80/87 octane minimum grade aviation gasoline Engine Limits: For all operations, 2600 rpm (230 Hp) Propeller and McCauley 2A36C29A/90M-8 Propeller Limits: Diameter: 13. дохіниті В0 тілітит Pitch Setting: Low; 22.0° High Governor: See Type Certificate Data Sheet 5A6 Powerplant Instrument Markings: Oil Temperature Green Arc 10 0nd Pressure:

to 225°F - normal operating range Yellow Arc 30 to 60 psi - normal operating range Red Line 10 psi minimum, 100 psi maximum Tachometer:

Green Arc 500 to 2600 rpm - normal operating range Red Line 2600 rpm - maximum Fuel Flow:

Green Arc 0 to 25 gph - normal operating range Cy Green Are 200 to 460 to 460°F - normal operating range Red Line 460°F - maximum C. G. Range: See Type Certificate Data Sheet 5A6 Maximum Weight: 2550 pounds

• Serial Number Eligible: 31348 only

• END -

FAA FORM B110-2-1 (10-69) PAGE 3 OF 3 PAGES C FAA AC 73-2651