# STC SA4378NM - Type: Supplemental type certificate - Status: Current, Amended - Holder: American Aviation Inc, United States - Description: Installation of Induction Air Intercoolers. - Applied: June 28, 1988 - Status date: November 1, 1998 - Product: Aircraft, Small Multi-Engine - Certification basis: Part 21, Part 23 - Data sheets: [TCDS A34CE](https://openairdocs.org/tcds/A34CE) - Certificate PDF: https://openairdocs.org/files/sha256/cb/34/cb340dc8b19b197a7465107b5b35e26c386564af7cb1f5d23927907e258da7d9 - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/7B287F4E93D13D0185256CC2000E3C00.0001 - DRS record last changed: December 6, 2025 - Page: https://openairdocs.org/stc/SA4378NM ## ADs that name it (0) None. ## Approved models (1) - Cessna Aircraft Company T303 ([TCDS A34CE](https://openairdocs.org/tcds/A34CE)) ## 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. Number SA4378NM This certificate, issued to: American Aviation, Inc. 10555 Airport Drive Coeur d'Alene Airport Hayden Lake, 10 83835 Part 23 of the Federal Aviation Regulations. Original ProductType Certificate Number: A34CE Make: Cessna Model: T303 Description of the Type Design Change: Installation of Induction Air Intercoolers in accordance with American Aviation, Inc., Model 85 Top Drawing List for Cessna Model T303 aircraft, dated October 20, 1988, or later FAA approved revision. This approval is limited to aircraft with engines modified per STC SE4382NM. Limitations and Conditions: Approval of this change in type design applies to the above model aircraft only. This approval should not be extended to other aircraft 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 aircraft. A copy of this Certificate and FAA Approved Airplane Flight Manual Supplement dated November 15, 1988, or later FAA approved revision 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: June 28, 1988 Date reissued: Date of issuance: November 15, 1988 Date amended: November 1, 1998 (Signature) Acting Manager, Seattle Aircraft Certification Office (Title) ## Every issue (1) - November 1, 1998: Amended, Current. [certificate](https://openairdocs.org/files/sha256/cb/34/cb340dc8b19b197a7465107b5b35e26c386564af7cb1f5d23927907e258da7d9) --- 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.