# STC SA293NW - Type: Supplemental type certificate - Status: Current, Amended - Holder: Franklin Aircraft Engines Inc. - Description: 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. - Status date: April 21, 2011 - Data sheets: 3A12, 3A12, 3A12, 3A12, 3A12, 3A12, 3A12, 3A12, 3A12, 3A12, 3A12, 3A12, 3A12, 3A12, 3A12, 3A17, 3A17, 3A17, 3A17, A-799, A-799 - Certificate PDF: https://openairdocs.org/files/sha256/43/92/43927a1ab396e4d683252ba2e506d2f6d1f5f370c179f4ad20ebf59d82462d76 - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/3357E216328076C88625787D004AF4DB.0001 - Page: https://openairdocs.org/stc/SA293NW ## ADs that name it None. ## Approved models (21) - Cessna Aircraft Company 170A (TCDS A-799) - Cessna Aircraft Company 170B (TCDS A-799) - Cessna Aircraft Company 172 (TCDS 3A12) - Cessna Aircraft Company 172A (TCDS 3A12) - Cessna Aircraft Company 172B (TCDS 3A12) - Cessna Aircraft Company 172C (TCDS 3A12) - Cessna Aircraft Company 172D (TCDS 3A12) - Cessna Aircraft Company 172E (TCDS 3A12) - Cessna Aircraft Company 172F (USAF T-41A) (TCDS 3A12) - Cessna Aircraft Company 172G (TCDS 3A12) - Cessna Aircraft Company 172H (USAF T-41A) (TCDS 3A12) - Cessna Aircraft Company 172I (TCDS 3A12) - Cessna Aircraft Company 172K (TCDS 3A12) - Cessna Aircraft Company 172L (TCDS 3A12) - Cessna Aircraft Company 172M (TCDS 3A12) - Cessna Aircraft Company 172N (TCDS 3A12) - Cessna Aircraft Company 172P (TCDS 3A12) - Cessna Aircraft Company 175 (TCDS 3A17) - Cessna Aircraft Company 175A (TCDS 3A17) - Cessna Aircraft Company 175B (TCDS 3A17) - Cessna Aircraft Company 175C (TCDS 3A17) ## What the certificate says Read from the PDF's text layer, without the form's printed wording; the layout is lost and the order can differ. The PDF is the record. 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 ### SA293NW AML.pdf FAA Approved Model List (AML) Number SA293NW Franklin Aircraft Engines, INC. for Installing Franklin 6A-350-C1 or 6A-350-C2 and HC-C2YF-1BF/F8459A-4 to -8, HC-C2YF-1BF-1BF/F8459A-4Q to -8Q, or McCauley 2A31C21/84S-4 to -8 propellers or Installing Franklin 6A-350-C1R engines, Hartzell HC-C2YF- 1BF/F8459A-4 to -8, HC-C2YF-1BF/F8459A-4Q to -8Q, McCauley 2A31C21/84S-4 to -8 or 2A34C201/90DA-10 to -14 propellers. REVISION A AMENDED DATE: April 21, 2011 *Note 1: All 170A models have flight time prior to January 1, 1955, therefore noise requirements not applicable to 170A Models per FAR 21.93(b)(3)(iii). Noise requirements also not applicable to 170B models, which have flight time prior to January 1, 1955. FAA Approval: _________________________________ Todd G. Dixon Manager, Denver Aircraft Certification Office Transport Airplane Directorate **INSTALLATION** **INSTRUCTIONS AFM** **SUPLEMENT** AML AMENDMENT Item (#) **AIRCRAFT** **MAKE AND MODEL** **ORIGINAL TYPE** **CERTIFICATE NUMBER** **CERTIFICATION BASIS** NUMBER NUMBER /DATE DATE 1 Cessna 170A & 170B A-799 CAR 3 SF20690 *See Note 1 June 22, 1976 or later FAA Approved Revision A 04/21/2011 2 Cessna 172 & 172A 3A12 CAR 3 SF20690 N/A A 04/21/2011 3 Cessna 172B through P 3A12 CAR 3 SF20821 N/A A 04/21/2011 4 Cessna 175, 175A, 175B, and 175C 3A17 CAR 3 SF20820 N/A A 04/21/2011 REVISION DATE DESCRIPTION A 04/21/2011 Amended FAA Approved Model List (AML) Number SA293NW Franklin Aircraft Engines, INC. for Installing Franklin 6A-350-C1 or 6A-350-C2 and HC-C2YF-1BF/F8459A-4 to -8, HC-C2YF-1BF-1BF/F8459A-4Q to -8Q, or McCauley 2A31C21/84S-4 to -8 propellers or Installing Franklin 6A-350-C1R engines, Hartzell HC-C2YF- 1BF/F8459A-4 to -8, HC-C2YF-1BF/F8459A-4Q to -8Q, McCauley 2A31C21/84S-4 to -8 or 2A34C201/90DA-10 to -14 propellers. ## Every issue (2) - April 21, 2011: Amended, Current. [certificate](https://openairdocs.org/files/sha256/43/92/43927a1ab396e4d683252ba2e506d2f6d1f5f370c179f4ad20ebf59d82462d76), [SA293NW AML.pdf](https://openairdocs.org/files/sha256/f4/bd/f4bd8eef2d481b2ada0aa59585212244fcd005c91982760db17212e4fbf59b88) - November 9, 1999: Amended, Historical. [certificate](https://openairdocs.org/files/sha256/30/45/30452c20ff980f87b49e420a5832bcc88212c0cfc69eafdceb9a770377c78b24) --- From OpenAirDocs.org, an independent open copy of FAA data. Only the Federal Register edition on govinfo.gov is the official legal text of an AD.