STC SA293NW

This certificate issued to: Franklin Aircraft Engines, Inc.

136 Racquette Drive Fort Collins, CO 80524

Part 3 of the Federal Aviation Regulations.

Original Product - Type Certificate Number: * See Attached Appoved Model List (AML) No. SA293NW for list of approved airplane models and applicable airworthiness regulations.

Description of Type Design Change: 1.) Installation of Franklin 6A-350-C1 or 6A-350-C2 engines, Hartzell HC- C2YF-1BF/F8459A -4 to -8, HC-C2YF-1BF/F8459A-4Q to -8Q, or McCauley 2A31C21/84S-4 to -8 propellers in accordance with Seaplane Flying, Inc. Assembly and Installation Instructions SF 20690, SF20821, or SF 20820, on Cessna Models 170A, 170B, 172, 172A, 172B through P, 175, 175A, 175B and 175C as defined in AML.

2.) Installation of Franklin 6A-350-C1R engines, Hartzell HC-C2YF-1BF/F8459A-4 to -8, HC-C2YF-1BF/F8459-4Q to -8, McCauley 2A31C21/84S-4 to -8 or 2A34C201/90DA-10 to -14 propellers in accordance with Seaplane Flying Inc. Assembly and Installation Instructions SF 20690 on Cessna Models 170A, 170B (Serial Numbers 20267 to 26504) as defined in AML.

Limitations and Conditions: This approval should not be extended to other aircraft of this model on which other previously approved modifications are incorporated, unless it is deternined by the installer that the interrelationship between this change and any other previously approved modifications will produce no adverse effect upon the airworthiness of that airplane. A copy of this Certificate, Approved Model List must be maintained as part of the permanent records for the modified aircraft. 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.

Date of application: March 27, 1976 Date of issuance: June 22, 1976 Date reissued: 3/2/1993; 7/31/1995; April 8, 1999

Date amended: 11/22/1976; 3/1/1977; 5/16/1970;

2/28/1980; 2/25/1982; 11/9/1999; April 21, 2011

( Signature) Todd Dixon Manager, Denver Aircraft Certification Office (Title)

FAA FORM 8110-2-1(10-69) PAGE 2 of 5 PAGES

Number SA293NW Date of Issuance: June 22, 1976 Date Amended: 11/22/1976; 3/1/1977; 5/16/1970; 2/28/1980; 2/25/1982; 11/9/1999; April 21, 2011

SUPPLEMENTAL TYPE CERTIFICATE ADDENDUM NO. SA293NW SECTION I

Supplemental Type Certificate Holder: Franklin Aircraft Engines, Inc.

The conditions and limitations of the Type Certificate Data Sheet Number 3A12 apply except where superseded by the following: This Supplemental Type Certification addendum, which is part of STC SA293NW, prescribes the conditions and limitations under which the STC was issued and meets the airworthiness requirements of the Civil Air Regulations.

MODEL CESSNA 172 and 172A (4PCLM) NORMAL CATEGORY AS MODIFIED BY STC SA293NW Diameter: 80” Maximum; 76” Minimum Governor: Woodward 210453 or 210660; McCauley C290D7/T2 Spinner: Hartzell 82A4203

Hartzell HC-C2YF-1BF/F8459A-4Q to -8Q Diameter: 80” Maximum; 76” Minimum Governor: Woodward 210453 or 210660; McCauley C290D7/T2 Spinner: Hartzell 82A4203

Powerplant Instrument Markings: Oil Temperature:

Green Arc 100°F to 235°F- Normal Operating Range Yellow Arc 60°F- Caution Red Line 235°- Maximum

Oil Pressure:

Green Arc 55 to 80 psi- Normal Operating Range Yellow Arc 25 to 55 psi/ 80 to 100 psi- Caution

Engine: Franklin 6A-350-C1, Franklin 6A-350-C2 and Franklin 6A-350-C1R Engine Limits: Takeoff (5 min.) 2800 rpm (215 Hp.) at Sea Level Maximum Continuous Power - 2600 rpm Full Throttle Fuel: 100/130 Octane Minimum Grade Aviation Gasoline Propeller/Propeller Limits: McCauley 2A31C21/84S -4 to -8 Diameter: 80” Maximum; 76” Minimum Governor: Woodward 210453 or 210660; McCauley C290D7/T2 Spinner: Cessna 0552016-1

Hartzell HC-C2YF-1BF/F8459A-4 to -8

FAA FORM 8110-2-1(10-69) PAGE 3 of 5 PAGES

Red Line 25 psi Minimum, 100 psi Maximum Number SA293NW

Tachometer:

Green Arc 2200 to 2600 rpm – Normal Operating Range Yellow Arc 2600 to 2800 rpm – Caution Range Red Line 2800 rpm – Maximum

Fuel Pressure:

Green Arc 0.5 to 8.5 psi – Normal Operating Range Red Line 9 psi – Maximum at Sea Level

Cylinder Head Temperature (Well-Type Thermocouple):

Green Arc 200°F to 390°F – Normal Operating Range Red Line 390°F – Maximum

C. G. Range: S ee Type Certification Data Sheet 3A12

Maximum Weight: See Type Certification Data Sheet 3A12

Placards: The following placard is to be in front and in full view of the pilot:

NOISE CERTIFICATION PROCEDURE:

Compliance with FAR 36, Appendix F, was shown with the following procedures: Level flyover at 1000 feet AGL at 2600 engine rpm and full throttle manifold pressure. The certificated noise level is 69.72 dB (A). This noise level reflects correction of as measured data to a standard 70°F, 77% R.H. acoustic day as well as a -5 dB (A) credit resulting from aircraft takeoff and climb characteristics.

End Section I

ENGINE LIMITS TAKEOFF: FIVE MIN. 2800 RPM MAXIMUM CONTINUOUS POWER -2600 FULL THROTTLE

FAA FORM 8110-2-1(10-69) PAGE 4 of 5 PAGES

Number SA293NW

SUPPLEMENTAL TYPE CERTIFICATE ADDENDUM NO. SA293NW SECTION II

Supplemental Type Certificate Holder Franklin Aircraft Engines, Inc.

The conditions and limitations of Type Certificate Data Sheet Number 3A17 apply except where superseded by the following: This Supplemental Type Certificate Data Sheet which is part of STC SA293NW, prescribes the conditions and limitations under which the STC was issued and meets the airworthiness requirements of the Civil Air Regulations.

MODEL CESSNA 175, 175A, 175B, and 175C (4PCLM) NORMAL CATEGORY AS MODIFIED BY STC SA293NW

Engine: Franklin 6A-350-C1, Franklin 6A-350-C2 and Franklin 6A-350-C1R Engine Limits: Takeoff (5 min.) 2800 rpm (215 Hp.) at Sea Level Maximum Continuous Power- 2600 rpm Full Throttle Fuel: 100/130 Octane Minimum Grade Aviation Gasoline Propeller/Propeller Limits: McCauley 2A31C21/84S -4 to -8 Diameter: 80” Maximum; 76” Minimum Governor: Woodward 210453 or 210660; McCauley C290D7/T2 Spinner: Cessna 0552016-1

Hartzell HC-C2YF-1BF/F8459A-4 to -8 Diameter: 80” Maximum; 76” Minimum Governor: Woodward 210453 or 210660; McCauley C290D7/T2 Spinner: Hartzell 82A4203

Hartzell HC-C2YF-1BF/F8459A-4Q to -8Q Diameter: 80” Maximum; 76” Minimum Governor: Woodward 210453 or 210660; McCauley C290D7/T2 Spinner: Hartzell 82A4203

Powerplant Instrument Markings: Oil Temperature:

Green Arc 100°F to 235°F- Normal Operating Range Yellow Arc 60°F- Caution Red Line 235°- Maximum

Oil Pressure:

Green Arc 55 to 80 psi- Normal Operating Range Yellow Arc 25 to 55 psi/ 80 to 100 psi- Caution Red Line 25 psi Minimum, 100 psi Maximum

FAA FORM 8110-2-1(10-69) PAGE 5 of 5 PAGES

Number SA293NW

Tachometer:

Green Arc 2200 to 2600 rpm – Normal Operating Range Yellow Arc 2600 to 2800 rpm – Caution Range Red Line 2800 rpm – Maximum

Fuel Pressure:

Green Arc 0.5 to 8.5 psi – Normal Operating Range Red Line 9 psi – Maximum at Sea Level

Cylinder Head Temperature (Well-Type Thermocouple):

Green Arc 200°F to 390°F – Normal Operating Range Red Line 390°F – Maximum

C. G. Range: S ee Type Certification Data Sheet 3A12

Maximum Weight: See Type Certification Data Sheet 3A12

Placards: The following placard is to be in front and in full view of the pilot:

NOISE CERTIFICATION PROCEDURE:

Compliance with FAR 36, Appendix F, was shown with the following procedures: Level flyover at 1000 feet AGL at 2600 engine rpm and full throttle manifold pressure. The certificated noise level is 69.72 dB (A). This noise level reflects correction of as measured data to a standard 70°F, 77% R.H. acoustic day as well as a -5 dB (A) credit resulting from aircraft takeoff and climb characteristics.

End Section II

ENGINE LIMITS TAKEOFF: FIVE MIN. 2800 RPM MAXIMUM CONTINUOUS POWER -2600 FULL THROTTLE