# STC SA3550NM - Type: Supplemental type certificate - Status: Current, Issued - Holder: Johnston Aircraft Svc, Inc, United States - Description: Installation of Hartzell / HC-C2YK-1BF/F8477D-5R . propeller - Applied: November 29, 1986 - Status date: December 10, 1986 - Product: Aircraft, Single-Engine - Certification basis: Part 21 - Data sheets: [TCDS 1A15](https://openairdocs.org/tcds/1A15) - Certificate PDF: https://openairdocs.org/files/sha256/3d/c9/3dc9b740dcad55ec3e2630e43634801599a688582576bfd40475a426eb26b0e1 - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/ABF59292C6F012F085256CC2000A992A.0001 - DRS record last changed: December 5, 2025 - Page: https://openairdocs.org/stc/SA3550NM ## ADs that name it (0) None. ## Approved models (1) - Piper Aircraft Inc. PA-24-250 ([TCDS 1A15](https://openairdocs.org/tcds/1A15)) ## What the certificate says This is OCR from the scanned FAA certificate. OCR can misread letters and numbers. 8103 United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate Number: SA3550NM This certificate issued to: Johnston Aircraft Service, Inc. Part 3 of the Civil Air infusive:' effective November 1, 1949, including Amendments 3-1 to 3-12, Original Product -Iypebartificate Lumber 1A15 Make: Piper • Medit PA-24-250 Propeller In accordance with FAn Sealed Johnston Aircraft Service, Inc. Installation of Hartzell HC-C2YK-1BF/F8477D-5R approved revision. Installation Instructions No. CPI-2 "NC" dated December 10, 1986, or later FAA FAA Approved Johnston Aircraft Service, Inc. Airplane Flight Manual Supplement No. 24-250 dated December 10, 1986, or later FAA approved revision is required with this installation. the basic aircraft of the specified model that is otherwise unmodified. Limitations and Conditions: . The approval of this change in type design applies to approval should not be extended to other specific airplanes of this model on which other previously approved modifications are incorporated, unless it is determined that the interrelationship between this change and any of those other previously that airplane. approved modifications will introduce no adverse effect upon the airworthiness of This certificate and the supporting data which is the basis for approval shall remnin in fpet until sarrendered, suspended, reaked, or a termenatas do is therwise established by the Salministrater of the Federal Aviation Administration I ate / applicution: November 29, 1985 Date Reissued: Date of Issuance: December 10, 1986 Date Amended: EDERAL AVIATION Harvei By Direction of the Administrator Manmitatig TOMINIS RATIO Manager, Weyter Aircraft Certification Office (1 itle ) 47 ## Every issue (1) - December 10, 1986: Issued, Current. [certificate](https://openairdocs.org/files/sha256/3d/c9/3dc9b740dcad55ec3e2630e43634801599a688582576bfd40475a426eb26b0e1) --- 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.