# STC SA01923LA - Type: Supplemental type certificate - Status: Current, Issued - Holder: Horizon Instruments Inc, United States - Description: Installation of the P-1000 Digital Electronic Tachometer. - Applied: May 19, 2006 - Status date: January 23, 2007 - Product: Aircraft, Small Multi-Engine - Certification basis: Part 21 - Data sheets: [TCDS A12SO](https://openairdocs.org/tcds/A12SO), [TCDS 1A8](https://openairdocs.org/tcds/1A8), [TCDS 3A23](https://openairdocs.org/tcds/3A23), [TCDS 2A3](https://openairdocs.org/tcds/2A3), [TCDS A-782](https://openairdocs.org/tcds/A-782), [TCDS 1A2](https://openairdocs.org/tcds/1A2), [TCDS 1A6](https://openairdocs.org/tcds/1A6), [TCDS A7SO](https://openairdocs.org/tcds/A7SO), [TCDS A1CE](https://openairdocs.org/tcds/A1CE), [TCDS A29CE](https://openairdocs.org/tcds/A29CE), [TCDS A17SO](https://openairdocs.org/tcds/A17SO), [TCDS A-767](https://openairdocs.org/tcds/A-767), [TCDS A31EU](https://openairdocs.org/tcds/A31EU), [TCDS 3A12](https://openairdocs.org/tcds/3A12), [TCDS 3A17](https://openairdocs.org/tcds/3A17), [TCDS A9CE](https://openairdocs.org/tcds/A9CE) - Certificate PDF: https://openairdocs.org/files/sha256/1a/cb/1acb2998f143797918f76f5b63788213a89454451a9d102c83c66c460e3be5d4 - Approved model list and other attachments: [SA01923LA_AML .pdf](https://openairdocs.org/files/sha256/f6/a1/f6a1f7baa5c21a83d1ecc2937673d2e9c9373428d0be75fae6f69e2603a221f0) - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/56812C110519A79F8625728900643117.0001 - DRS record last changed: December 6, 2025 - Page: https://openairdocs.org/stc/SA01923LA ## ADs that name it (0) None. ## Approved models (24) - CPAC Inc (Commander Aircraft) 114 ([TCDS A12SO](https://openairdocs.org/tcds/A12SO)) - Cessna Aircraft Company 172C ([TCDS 3A12](https://openairdocs.org/tcds/3A12)) - Cessna Aircraft Company R172K ([TCDS 3A17](https://openairdocs.org/tcds/3A17)) - Cessna Aircraft Company T188C ([TCDS A9CE](https://openairdocs.org/tcds/A9CE)) - Helio Aircraft LLC H-295 (USAF U10D) ([TCDS 1A8](https://openairdocs.org/tcds/1A8)) - Maule Aerospace Technology Inc. M-4-210C ([TCDS 3A23](https://openairdocs.org/tcds/3A23)) - Maule Aerospace Technology Inc. M-7-235B ([TCDS 3A23](https://openairdocs.org/tcds/3A23)) - Mooney Aircraft Corporation M20R ([TCDS 2A3](https://openairdocs.org/tcds/2A3)) - Mooney Aircraft Corporation M20S ([TCDS 2A3](https://openairdocs.org/tcds/2A3)) - Navion Aircraft Company Ltd. Navion G ([TCDS A-782](https://openairdocs.org/tcds/A-782)) - Piper Aircraft Inc. PA-18A ([TCDS 1A2](https://openairdocs.org/tcds/1A2)) - Piper Aircraft Inc. PA-22 ([TCDS 1A6](https://openairdocs.org/tcds/1A6)) - Piper Aircraft Inc. PA-22-108 ([TCDS 1A6](https://openairdocs.org/tcds/1A6)) - Piper Aircraft Inc. PA-22-135 ([TCDS 1A6](https://openairdocs.org/tcds/1A6)) - Piper Aircraft Inc. PA-22-150 ([TCDS 1A6](https://openairdocs.org/tcds/1A6)) - Piper Aircraft Inc. PA-22-160 ([TCDS 1A6](https://openairdocs.org/tcds/1A6)) - Piper Aircraft Inc. PA-34-200T ([TCDS A7SO](https://openairdocs.org/tcds/A7SO)) - Raytheon Aircraft Company 76 ([TCDS A29CE](https://openairdocs.org/tcds/A29CE)) - Raytheon Aircraft Company A23-19 ([TCDS A1CE](https://openairdocs.org/tcds/A1CE)) - Raytheon Aircraft Company A24R ([TCDS A1CE](https://openairdocs.org/tcds/A1CE)) - Raytheon Aircraft Company B24R ([TCDS A1CE](https://openairdocs.org/tcds/A1CE)) - SOCATA - Groupe Aerospatiale GA-7 ([TCDS A17SO](https://openairdocs.org/tcds/A17SO)) - Univair Aircraft Corporation 108-3 ([TCDS A-767](https://openairdocs.org/tcds/A-767)) - Vulcanair S.p.A. P 68C-TC ([TCDS A31EU](https://openairdocs.org/tcds/A31EU)) ## 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 HORIZON INSTRUMENTS, INC. 600 S. Jefferson Street, Unit C Placentia, California 92870 Part * of the * Air Regulations Original Product Type Certificate Number : **see attached FAA Approved Model List (AML) No. * SA01923LA for list applicable aircraft make and * models and applicable airworthiness regulations Description of Type Design Change: Installation of the P-1000 Digital Electronic Tachometer. Limitations and Conditions : This approval should not be extended to other specific airplanes of these models on which other previously approve d modifications are incorporated unless it is determined that the interrelationship between th is change and any of those other previously approved modifications will introduce no adverse eff ect upon the airworthiness of that airplane. A copy of this STC must be included in the perman ent 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. Date of application : May 19, 2006 Date of issuance : January 23, 2007 ( Signature) Manager, Propulsion Branch Los Angeles Aircraft Certification Office ( Title) NOTE: **DO NOT DELETE THIS PAGE.** **DO NOT ADD ANY DATA TO THIS PAGE.** **THIS PAGE IS FOR PAGE NUMBERING PURPOSES, PLEASE DISCARD PRINTED COPY.** ### SA01923LA_AML .pdf **FAA APPROVED MODEL LIST (AML) NO. SA01923LA HORIZON INSTRUMENTS, INC.** INSTALLATION OF THE P-1000 DIGITAL ELECTRONIC TACHOMETER INTO VARIOUS AIRPLANES (must be accomplished concurrently on airplane modified with STC listed below, if applicable) Issue Date: January 23, 2007 Item Aircraft Make Aircraft Model Original Type Certificate No. Modified with STC (If Applicable) Engine or STC No. Propeller Airplane Flight Manual Supplement No., Date (or later FAA Approved Revision) Master Drawing List No., Rev., Date (or later FAA Approved Revision) P-1000 Part Number AML Amendment Date Page 1 of 5 1 Beechcraft 76 A29CE N/A Lycoming O-360-A1G6D (left) LO-360- A1G6D (right) Supplement No. 1 1/22/07 MDL P100906, Rev N/C, 12/20/06 P100-906-425-00 08/09/07 2 Beechcraft A23-19 A1CE N/A Lycoming O-320 E2C Supplement No. 1 2/14/07 MDL P100905, Rev N/C, 12/20/06 P100-905-147-00 08/09/07 3 Beechcraft A24R A1CE N/A Lycoming IO-360-A1B Supplement No. 1 2/14/07 MDL P100900, Rev N/C, 12/20/06 P100-900-370-00 08/09/07 4 Beechcraft B24R A1CE N/A Lycoming IO-360-A1B6 Supplement No. 1 2/14/07 MDL P100900, Rev N/C, 12/20/06 P100-900-147-00 08/09/07 5 Cessna 172C 3A2 SA420CE Lycoming O-360-A3A Supplement No. 1 2/14/07 MDL P100955, Rev N/C, 12/20/06 P100-955-493-03 08/09/07 6 Cessna R172K 3A17 SA1437CE Continental IO-360-KB Supplement No. 1 6/01/07 MDL P100958, Rev N/C, 12/20/06 P100-958-619-00 08/09/07 **FAA APPROVED MODEL LIST (AML) NO. SA01923LA HORIZON INSTRUMENTS, INC.** INSTALLATION OF THE P-1000 DIGITAL ELECTRONIC TACHOMETER INTO VARIOUS AIRPLANES (must be accomplished concurrently on airplane modified with STC listed below, if applicable) Issue Date: January 23, 2007 Item Aircraft Make Aircraft Model Original Type Certificate No. Modified with STC (If Applicable) Engine or STC No. Propeller Airplane Flight Manual Supplement No., Date (or later FAA Approved Revision) Master Drawing List No., Rev., Date (or later FAA Approved Revision) P-1000 Part Number AML Amendment Date Page 2 of 5 7 Cessna T188C A9CE N/A Continental TSIO-520-T Supplement No. 1 6/01/07 MDL P100961, Rev N/C, 12/20/06 P100-961-099-00 08/09/07 8 Grumman GA-7 A17SO N/A Lycoming O-320 Supplement No. 1 1/4/07 MDL P100943, Rev N/C, 12/20/06 P100-943-425-00 08/09/07 9 Helio H-295 1A8 N/A Lycoming GO-480 Supplement No. 1 1/4/07 MDL P100000, Rev N/C, 12/20/06 P100-000-636-03 08/09/07 10 Maule M-4-210C 3A23 N/A TCM IO-360 Supplement No. 1 1/4/07 MDL P100901, Rev N/C, 12/20/06 P100-901-249-00 08/09/07 11 Maule M-7-235-B 3A23 N/A Lycoming O-540-J3A5 Supplement No. 1 6/01/07 MDL P100901, Rev N/C, 12/20/06 P100-901-638-00 08/09/07 12 Mooney M20R, M20S 2A3 SA02193CH Continental IO-550G Supplement No. 1 6/01/07 MDL P100301, Rev N/C, 12/20/06 P100-301-655-00 08/09/07 **FAA APPROVED MODEL LIST (AML) NO. SA01923LA HORIZON INSTRUMENTS, INC.** INSTALLATION OF THE P-1000 DIGITAL ELECTRONIC TACHOMETER INTO VARIOUS AIRPLANES (must be accomplished concurrently on airplane modified with STC listed below, if applicable) Issue Date: January 23, 2007 Item Aircraft Make Aircraft Model Original Type Certificate No. Modified with STC (If Applicable) Engine or STC No. Propeller Airplane Flight Manual Supplement No., Date (or later FAA Approved Revision) Master Drawing List No., Rev., Date (or later FAA Approved Revision) P-1000 Part Number AML Amendment Date Page 3 of 5 13 Navion G A-782 SA5491NM TCM IO-470H Supplement No. 1 MDL P100904, Rev N/C, 12/20/06 P100-9004-103-00 08/09/07 14 Partenavia P68C-TC A31EU N/A Lycoming TO-360- C1A6D Supplement No. 1 1/22/07 MDL P100902, Rev N/C, 12/20/06 P100-902-822-00 08/09/07 15 Piper PA-34- 200T A7SO SA5842NM TCM TSIO-360 Supplement No. 1 1/4/07 MDL P100970, Rev N/C, 12/20/06 P100-970-609-00 08/09/07 **FAA APPROVED MODEL LIST (AML) NO. SA01923LA HORIZON INSTRUMENTS, INC.** INSTALLATION OF THE P-1000 DIGITAL ELECTRONIC TACHOMETER INTO VARIOUS AIRPLANES (must be accomplished concurrently on airplane modified with STC listed below, if applicable) Issue Date: January 23, 2007 Item Aircraft Make Aircraft Model Original Type Certificate No. Modified with STC (If Applicable) Engine or STC No. Propeller Airplane Flight Manual Supplement No., Date (or later FAA Approved Revision) Master Drawing List No., Rev., Date (or later FAA Approved Revision) P-1000 Part Number AML Amendment Date Page 4 of 5 16 Piper PA-34- 200T A7SO SA1797NM Continental TSIO-360-KB and McCauley 3AF32C508- 82NFA; and LTSIO-360-KB And McCauley 3AF32C509- L82NFA Supplement No. 1 6/01/07 MDL P100970, Rev N/C, 12/20/06 P100-970-634-00 08/09/07 17 Piper PA-18A 1A2 SA6019NM Lycoming O-320 Supplement No. 1 1/4/07 MDL P100973, Rev N/C, 12/20/06 P100-973-408-03 08/09/07 18 Piper PA-22, PA-22- 135, PA- 22-150, PA-22- 160, PA- 22-108 1A6 SA181RM Lycoming O-360-A4A Supplement No. 1 2/16/07 MDL P100972, Rev N/C, 12/20/06 P100-972-508-00 08/09/07 **FAA APPROVED MODEL LIST (AML) NO. SA01923LA HORIZON INSTRUMENTS, INC.** INSTALLATION OF THE P-1000 DIGITAL ELECTRONIC TACHOMETER INTO VARIOUS AIRPLANES (must be accomplished concurrently on airplane modified with STC listed below, if applicable) Issue Date: January 23, 2007 Item Aircraft Make Aircraft Model Original Type Certificate No. Modified with STC (If Applicable) Engine or STC No. Propeller Airplane Flight Manual Supplement No., Date (or later FAA Approved Revision) Master Drawing List No., Rev., Date (or later FAA Approved Revision) P-1000 Part Number AML Amendment Date Page 5 of 5 19 Rockwell Commander AC-114 A12SO SA5843NM Lycoming IO-540 Supplement No.1 1/4/07 MDL P100971, Rev N/C, 12/20/06 P100-971-608-01 08/09/07 20 Stinson 108-3 A-767 N/A Franklin 6A4-165 Supplement No. 1 1/4/07 MDL P100903, Rev N/C, 12/20/06 P100-903-671-00 08/09/07 FAA Approved: Manager, Propulsion Branch Date: August 9, 2007 Los Angeles Aircraft Certification Office ## Every issue (1) - January 23, 2007: Issued, Current. [certificate](https://openairdocs.org/files/sha256/1a/cb/1acb2998f143797918f76f5b63788213a89454451a9d102c83c66c460e3be5d4), [SA01923LA_AML .pdf](https://openairdocs.org/files/sha256/f6/a1/f6a1f7baa5c21a83d1ecc2937673d2e9c9373428d0be75fae6f69e2603a221f0) --- 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.