# STC SA00261SE - Type: Supplemental type certificate - Status: Current, Amended - Holder: Ly-Con Rebuilding Company, United States - Description: Installation of Lycoming O-320-E2D engines modified by STC SE00252SE, O-320-D2G or O-320-D2J engine and McCauley 1C160/CTM 7557 or 1C160/DTM 7557 or 1A175/ETM (seaplane only) propeller. (Landplanes and Seaplanes) - Applied: June 19, 1995 - Status date: December 3, 1998 - Product: Aircraft, Single-Engine - Certification basis: Part 21 - Data sheets: [TCDS 3A12](https://openairdocs.org/tcds/3A12) - Certificate PDF: https://openairdocs.org/files/sha256/5c/c0/5cc01968fd15119c8c8a41b6680bb78450274b8c751311a6fc6eb8f61f6be654 - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/E9336FA6285DF36085256CC1007DC86C.0001 - DRS record last changed: December 6, 2025 - Page: https://openairdocs.org/stc/SA00261SE ## ADs that name it (0) None. ## Approved models (4) - The Cessna Aircraft Company 172I ([TCDS 3A12](https://openairdocs.org/tcds/3A12)) - The Cessna Aircraft Company 172K ([TCDS 3A12](https://openairdocs.org/tcds/3A12)) - The Cessna Aircraft Company 172L ([TCDS 3A12](https://openairdocs.org/tcds/3A12)) - The Cessna Aircraft Company 172M ([TCDS 3A12](https://openairdocs.org/tcds/3A12)) ## What the certificate says This is OCR from the scanned FAA certificate. OCR can misread letters and numbers. United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate Number: SA00261SE This certificate issued to: Ly-Con Rebuilding Company 8231 Doe Avenue Visalia, CA 93291 Certifies that the change in the type design for the following product with the limitations and conditions therefor as specified hereon meets the airworthiness requirement's of Part 3 of the Civil Air Regulations. Original Product -Type Certificate Number: 3A12 Make: Cessna Model: 172 I, K, L, and M Landplanes and Seaplanes Description of Type Design Change: Installation of Lycoming O-320-E2D engines modified by STC SE00252SE, O-320-D2G or O-320-D2J engine and McCauley 1C160/CTM 7557 or 1C160/DTM 7557 or 1A175/ETM (seaplane only) propeller per Ly-Con Rebuilding Co., Data List dated December 20, 1976, revised October 21, 1998, or later FAA approved revision. Limitations and Conditions: Approval of this change in type design applies to the above model airplanes only. This approval should not be extended to other airplanes of this model on which other previously approved modifications are incorporated unless it is determined that the relationship between this change and any of those other previously approved modifications, including changes in type design, will introduce no adverse effect upon the airworthiness of that airplane. A copy of this Certificate and Continuation Sheet must be maintained as part of the permanent records for the modified airplane. 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 (See Continuation Sheet) Date of Application: June 19, 1995 Date Reissued: Date of Issuance: December 29, 1995 Date Amended: April 28, 1997; December 3, 1998 FEDERAL AVIATION By Direction of the Administrator fier modit Signature TOMINIST RATION Acting Manager, Seattle Aircraft Certification Office (Title) United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number: SA00261SE Ly-Con Rebuilding Co. Reissued: Amended: April 28, 1997; December 3, 1998 Limitations and Conditions: continued: TCDS No. 3A12 applies except as noted below: Engine: Lycoming O-320-E2D modified per STC SE00252SE, O-320-D2G, or 0-320-D2J Fuel: 100/130 minimum grade aviation gasoline. Engine Limits: Takeoff (five minutes) 2700 RPM (160 h.p.) Maximum Continuous 2500 RPM (150 h.p.) Propeller and Propeller Limits: 1. Propeller approved on Cessna Models 172 1, K, L, M (a) McCauley 1C160/CTM 7557 - static RPM at maximum permissible throttle setting. Not over 2400, not under 2280. No additional tolerance permitted. Diameter not over 75 in., and not under 74 in. (b) Cessna spinner - Drawing No. 0550320 required. 2. Propeller approved on Cessna Model 172 M (a) McCauley 1C160/DTM 7557 - static RPM at maximum permissible throttle setting. Not over 2400, not under 2280. No additional tolerance permitted. Diameter: Not over 75 in., not under 74 in. (b) Cessna spinner - Drawing No. 0550320 required. The following placards must be displayed as indicated: Near fuel tank filler caps: 100/130 Minimum Octane Aviation Grade Gasoline. **FAA FORM 8110-2- 1 (10-69) PAGE 3 OF 4 PAGES** United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number: SA00261SE Ly-Con Rebuilding Co. Reissued: Amended: April 28, 1997; December 3, 1998 Limitations and Conditions: continued: 3. Propeller Cessna Model 172 I, K, L, M Seaplane only. (a) McCauley 1A175/ETM Static R. P.M. at maximum permissible throttle setting: Not over 2570, not under 2470 No additional tolerance permitted. Diameter: Not over 80 in., not under 78.5 in. (b) Cessna spinner - Drawing No. 0550320 required. The following placards must be displayed as indicated: Near fuel tank filler caps: 100/130 Minimum Octane Aviation Grade Gasoline. -END- **FAA FORM 8110-2-1 (10-69) PAGE 4 OF 4 PAGES** ## Every issue (1) - December 3, 1998: Amended, Current. [certificate](https://openairdocs.org/files/sha256/5c/c0/5cc01968fd15119c8c8a41b6680bb78450274b8c751311a6fc6eb8f61f6be654) --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.