# STC SA6019NM - Type: Supplemental type certificate - Status: Current, Reissued - Holder: Horizon Instruments Inc, United States - Description: Installation of an electronic digital engine tachometer. - Applied: January 28, 1993 - Status date: January 14, 2002 - Product: Aircraft, Single-Engine - Certification basis: Part 21 - Data sheets: [TCDS 1A15](https://openairdocs.org/tcds/1A15) - Certificate PDF: https://openairdocs.org/files/sha256/b8/13/b813105747a61a5ec280ba8b723514a09b155ba89d8a94154a3fb3f2d5241aa4 - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/5BE75C4DE7EEFA8D85256CC200569DE3.0001 - DRS record last changed: December 6, 2025 - Page: https://openairdocs.org/stc/SA6019NM ## ADs that name it (0) None. ## Approved models (4) - The New Piper Aircraft Inc. PA-24 ([TCDS 1A15](https://openairdocs.org/tcds/1A15)) - The New Piper Aircraft Inc. PA-24-250 ([TCDS 1A15](https://openairdocs.org/tcds/1A15)) - The New Piper Aircraft Inc. PA-24-260 ([TCDS 1A15](https://openairdocs.org/tcds/1A15)) - The New Piper Aircraft Inc. PA-24-400 ([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. United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate Number: SA6019NM This certificate issued to: Horizon Instruments, Inc. 600 S. Jefferson St., Unit C Placentia, CA 92870 Part 23 of the Federal Aviation Regulations, Including Amendments 3-1 through 3-12 Original Product Type Certificate Number: 1A15 Make: Piper Model: PA-24, PA-24-250, PA-24-260, & PA-24-400 Description of Type Design Change: Installation of an Electronic Digital Engine Tachometer, Horizon Model P-1000, P/N P100073- (Applicability Table on continuation sheet) in Piper Model PA-24 aircraft, in accordance with Horizon Master Drawing List No. P100073, Rev. N/C, dated 1/15/93, and/or later FAA approved revision. Horizon Airplane Flight Manual Supplement No. 1, Rev. N/C, May 7, 1993, and/or later approved revision is required. Limitations and Conditions: The installation should not be incorporated in any aircraft unless it is determined that the interrelationship between this installation and any previously approved configuration will not introduce any adverse effect upon the airworthiness of the aircraft. The approval of this modification applies to the above noted airplane model series only. A copy of this STC must be included in the permanent records of 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. TRANSFER ENDORSEMENT Transfer the ownership of Supplemental Type Certificate Number to (Name of transferee) (Address of transferee) (Number and street) (City, State, and ZIP code ) from (Name of grantor) (Print or type) (Address of grantor) (Number and street ) (City, State, and ZIP code) Extent of Authority (if licensing agreement): Signature of grantor (In ink):. United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number: SA6019NM Applicability Table Aircraft Model Serial Numbers Tachometer Part Number PA-24, PA-24-180 All P100073-408-03 PA-24-250 All *P100073-603-03 **P100073-615-03 PA-24-260 All P100073-608-03 PA-24-400 All P100073-803-03 * Tachometer markings required by Aircraft Type Certificate Data Sheet No. 1A15, propeller and propeller accessories notes 3A and 5A. ** Tachometer markings required by Aircraft Type Certificate Data Sheet No. 1A15, propeller and propeller accessories notes 9A and 9C. - END - 47. ## Every issue (1) - January 14, 2002: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/b8/13/b813105747a61a5ec280ba8b723514a09b155ba89d8a94154a3fb3f2d5241aa4) --- 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.