# STC SA5581SW - Type: Supplemental type certificate - Status: Current, Reissued - Holder: Alcor LLC - Description: Installation of ALCOR true-flow/ totalizer system - Status date: May 27, 2025 - Data sheets: 7A12, 7A12, 7A12, 7A12, A19EU, 1A16, 1A16, A25EU, A-758, H-1, H-1, H-1, 1A3, 1A3, 1A9, 1A9, 1A9, 1A9, 1A9, 1A9, A11EU, A11EU, 3A10, 3A10, 3A11, 3A12, 3A17, 3A17, 3A25, 3A25, 5A2, A-768, A-768, A-790, A-790, A25CE, A25CE, A2CE, A4CE, A4CE, A4CE, A4CE, A4CE, A6CE, A6CE, A7CE, A7CE, A7CE, A7CE, A7CE, A7CE, A00009CH, A00009CH, 3A1, 3A1, 3A1, 3A1, A45CE, 2A11, 1, 1, A-804, A6SO, 3A23, 3A23, 3A23, 3A23, 3A23, 3A23, 3A23, 3A23, 3A23, 3A23, 3A23, 2A3, A-782, A-782, A-782, A-782, A-782, A-782, A-782, A-782, A-782, A-782, A31EU, A31EU, A31EU, A31EU, 2A13, 2A13, 2A13, A-740, A7SO, A1IN, A1IN, A68EU, 3A15, 3A15, 3A15, 3A15, 3A16, 3A16, 3A16, 3A16, A1CE, A1CE, A18EU, A23EU, A23EU, A23EU, A23EU, A23EU, A23EU, A23EU, A23EU, 7A14, 7A14, 7A14, 7A14, 7A14, 7A14, 7A14, 7A14, 7A14, 7A14, 7A14, 7A14, 7A14, H7WE, H7WE, H7WE, 2A4, 2A4, S00007LA - Certificate PDF: https://openairdocs.org/files/sha256/99/53/995364e48078d724ae42a9f4e29a145c1d20a183887a9d0f99cedab6f9760b56 - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID144854012820250624182711.0001 - Page: https://openairdocs.org/stc/SA5581SW ## ADs that name it None. ## Approved models (135) - Aeronautica Macchi S.p.A. AL60 (TCDS 7A12) - Aeronautica Macchi S.p.A. AL60-B (TCDS 7A12) - Aeronautica Macchi S.p.A. AL60-C5 (TCDS 7A12) - Aeronautica Macchi S.p.A. AL60-F5 (TCDS 7A12) - Aeronautica Macchi S.p.A. & Aerfer-Industrie Aerospaziali Meridionali S.p.A. AM-3 (TCDS A19EU) - Ag Cat Corporation G Series (TCDS 1A16) - Ag Cat Corporation G-164 Series (TCDS 1A16) - Agusta S.p.A. S.210 (TCDS A25EU) - Aircraft Parts & Development Corp. A Series (TCDS A-758) - Bell Helicopter Textron 47 Series (TCDS H-1) - Bell Helicopter Textron 47D1 Series (TCDS H-1) - Bell Helicopter Textron 47G Series (TCDS H-1) - Bellanca Aircraft Corporation 14-19 Series (TCDS 1A3) - Bellanca Aircraft Corporation 17 Series (TCDS 1A3) - Booth Lee F. dba Taylorcraft Aerospace 19 (TCDS 1A9) - Booth Lee F. dba Taylorcraft Aerospace F19 (TCDS 1A9) - Booth Lee F. dba Taylorcraft Aerospace F21 (TCDS 1A9) - Booth Lee F. dba Taylorcraft Aerospace F21A (TCDS 1A9) - Booth Lee F. dba Taylorcraft Aerospace F21B (TCDS 1A9) - Booth Lee F. dba Taylorcraft Aerospace F22 (TCDS 1A9) - British Aerospace (Scotland) B.206 Series 1 (TCDS A11EU) - British Aerospace (Scotland) B.206 Series 2 (TCDS A11EU) - Cirrus Design Corporation SR20 (TCDS A00009CH) - Cirrus Design Corporation SR22 (TCDS A00009CH) - Estumkeda Ltd. dba Micco Aircraft Company MAC-125C (TCDS 3A1) - Estumkeda Ltd. dba Micco Aircraft Company MAC-145 (TCDS 3A1) - Estumkeda Ltd. dba Micco Aircraft Company MAC-145A (TCDS 3A1) - Estumkeda Ltd. dba Micco Aircraft Company MAC-145B (TCDS 3A1) - Ilyushin Aviation Complex IL-103 (TCDS A45CE) - Lockheed Aircraft Corporation 402-2 (TCDS 2A11) - Lockheed Martin Tactical Defense Systems GZ-19 (TCDS 1) - Lockheed Martin Tactical Defense Systems GZ-20 (TCDS 1) - Luscombe Aircraft Corporation 11A (TCDS A-804) - Mael Aircraft Corporation BA-42 (TCDS A6SO) - Maule Aerospace Technology Inc. Bee Dee M-4 Series (TCDS 3A23) - Maule Aerospace Technology Inc. Bee Dee M-5 Series (TCDS 3A23) - Maule Aerospace Technology Inc. Bee Dee M-6 Series (TCDS 3A23) - Maule Aerospace Technology Inc. Bee Dee M-7 Series (TCDS 3A23) - Maule Aerospace Technology Inc. Bee Dee M-8 Series (TCDS 3A23) - Maule Aerospace Technology Inc. Bee Dee MX-7 Series (TCDS 3A23) - Maule Aerospace Technology Inc. M-7-260 (TCDS 3A23) - Maule Aerospace Technology Inc. M-7-420AC (TCDS 3A23) - Maule Aerospace Technology Inc. MT-7-260 (TCDS 3A23) - Maule Aerospace Technology Inc. MX-7-160C (TCDS 3A23) - Maule Aerospace Technology Inc. MX-7-180AC (TCDS 3A23) - Mooney Aircraft Corporation M20 Series (TCDS 2A3) - Navion Aircraft Company Ltd. Navion (L-17A) (TCDS A-782) - Navion Aircraft Company Ltd. Navion A (L-17B) (TCDS A-782) - Navion Aircraft Company Ltd. Navion A (L-17C) (TCDS A-782) - Navion Aircraft Company Ltd. Navion B (TCDS A-782) - Navion Aircraft Company Ltd. Navion D (TCDS A-782) - Navion Aircraft Company Ltd. Navion E (TCDS A-782) - Navion Aircraft Company Ltd. Navion F (TCDS A-782) - Navion Aircraft Company Ltd. Navion G (TCDS A-782) - Navion Aircraft Company Ltd. Navion H (TCDS A-782) - Navion Aircraft Company Ltd. Navion Series (TCDS A-782) - PZL Mielec PZL M20 03 (TCDS A68EU) - Partenavia Costruzioni Aeronauticas S.p.A. AP68TP 300 "Spartacus" (TCDS A31EU) - Partenavia Costruzioni Aeronauticas S.p.A. AP68TP 600 "Viator" (TCDS A31EU) - Partenavia Costruzioni Aeronauticas S.p.A. P68 (TCDS A31EU) - Partenavia Costruzioni Aeronauticas S.p.A. P68 Series (TCDS A31EU) - Procaer Progetti Costruzioni Aeronautiche F 15/B (TCDS A1IN) - Procaer Progetti Costruzioni Aeronautiche F 15/C (TCDS A1IN) - Raytheon Aircraft Company 23 Series (TCDS A1CE) - Raytheon Aircraft Company 24 Series (TCDS A1CE) - Raytheon Aircraft Company 33 Series (TCDS 3A15) - Raytheon Aircraft Company 35 Series (TCDS 3A15) - Raytheon Aircraft Company 35-33 Series (TCDS 3A15) - Raytheon Aircraft Company 36 Series (TCDS 3A15) - Raytheon Aircraft Company 55 Series (TCDS 3A16) - Raytheon Aircraft Company 56 Series (TCDS 3A16) - Raytheon Aircraft Company 58 Series (TCDS 3A16) - Raytheon Aircraft Company 95 Series (TCDS 3A16) - Reims Aviation S.A. F337E (TCDS A23EU) - Reims Aviation S.A. F337F (TCDS A23EU) - Reims Aviation S.A. F337G (TCDS A23EU) - Reims Aviation S.A. F337H (TCDS A23EU) - Reims Aviation S.A. FR172 Series (TCDS A18EU) - Reims Aviation S.A. FT337E (TCDS A23EU) - Reims Aviation S.A. FT337F (TCDS A23EU) - Reims Aviation S.A. FT337GP (TCDS A23EU) - Reims Aviation S.A. FT337HP (TCDS A23EU) - SOCATA - Groupe Aerospatiale 100S (TCDS 7A14) - SOCATA - Groupe Aerospatiale 150ST (TCDS 7A14) - SOCATA - Groupe Aerospatiale 150T (TCDS 7A14) - SOCATA - Groupe Aerospatiale 235C (TCDS 7A14) - SOCATA - Groupe Aerospatiale 235E (TCDS 7A14) - SOCATA - Groupe Aerospatiale MS880B (TCDS 7A14) - SOCATA - Groupe Aerospatiale MS885 (TCDS 7A14) - SOCATA - Groupe Aerospatiale MS892A-150 (TCDS 7A14) - SOCATA - Groupe Aerospatiale MS892E-150 (TCDS 7A14) - SOCATA - Groupe Aerospatiale MS893A (TCDS 7A14) - SOCATA - Groupe Aerospatiale MS893E (TCDS 7A14) - SOCATA - Groupe Aerospatiale MS894A (TCDS 7A14) - SOCATA - Groupe Aerospatiale MS894E (TCDS 7A14) - Sterling Aircraft Industries Inc. Army H-25A (TCDS H7WE) - Sterling Aircraft Industries Inc. Navy HUP-2 (TCDS H7WE) - Sterling Aircraft Industries Inc. Navy HUP-3 (TCDS H7WE) - The Cessna Aircraft Company 120 (TCDS A-768) - The Cessna Aircraft Company 140 (TCDS A-768) - The Cessna Aircraft Company 140A (TCDS 5A2) - The Cessna Aircraft Company 172 Series (TCDS 3A12) - The Cessna Aircraft Company 175 Series (TCDS 3A17) - The Cessna Aircraft Company 190 (TCDS A-790) - The Cessna Aircraft Company 195 Series (TCDS A-790) - The Cessna Aircraft Company 206 Series (TCDS A4CE) - The Cessna Aircraft Company 310 Series (TCDS 3A10) - The Cessna Aircraft Company 320 Series (TCDS 3A25) - The Cessna Aircraft Company 321 (Navy OE-2) (TCDS 3A11) - The Cessna Aircraft Company 336 (TCDS A2CE) - The Cessna Aircraft Company 337 Series (TCDS A6CE) - The Cessna Aircraft Company 340 Series (TCDS 3A25) - The Cessna Aircraft Company 401 Series (TCDS A7CE) - The Cessna Aircraft Company 402 Series (TCDS A7CE) - The Cessna Aircraft Company 404 (TCDS A25CE) - The Cessna Aircraft Company 406 (TCDS A25CE) - The Cessna Aircraft Company 411 Series (TCDS A7CE) - The Cessna Aircraft Company 414 (TCDS A7CE) - The Cessna Aircraft Company 421 Series (TCDS A7CE) - The Cessna Aircraft Company 425 (TCDS A7CE) - The Cessna Aircraft Company P206 Series (TCDS A4CE) - The Cessna Aircraft Company R172 Series (TCDS 3A17) - The Cessna Aircraft Company T310 Series (TCDS 3A10) - The Cessna Aircraft Company T337 Series (TCDS A6CE) - The Cessna Aircraft Company TP206 Series (TCDS A4CE) - The Cessna Aircraft Company TU206 Series (TCDS A4CE) - The Cessna Aircraft Company U206 Series (TCDS A4CE) - The New Piper Aircraft Inc. J4E (Army L-4E) (TCDS A-740) - The New Piper Aircraft Inc. PA-28 Series (TCDS 2A13) - The New Piper Aircraft Inc. PA-28R Series (TCDS 2A13) - The New Piper Aircraft Inc. PA-28S Series (TCDS 2A13) - The New Piper Aircraft Inc. PA-34 Series (TCDS A7SO) - Twin Commander Aircraft Corporation 600 Series (TCDS 2A4) - Twin Commander Aircraft Corporation 680 Series (TCDS 2A4) - Worldwide Aeros Corp. Aeros 40B (TCDS S00007LA) ## 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. SA5581SW Alcor LLC 300 Breesport St. San Antonio, TX 78216 Part 3 the Civil Air Regulations See Limitations and Conditions See Limitations and Conditions See Limitations and Conditions Supplemental Type Certificate SE5583SW is required. Eligible on aircraft listed on ALCOR Effectively List dated 06/20/84. The installer must determine whether this design change is compatible with previously approved modifications. If the holder agrees to permit another person to use this certificate to alter a product, the holder must give the other person written evidence of that permission. 11/28/1983 07/05/1994 09/30/2002 05/27/2025 06/20/1984 for Paul Nguyen Manager, Central Certification Branch Compliance & Airworthiness Division Aircraft Certification Service 2 Installation of ALCOR True-Flow/Totalizer System in accordance with Installation Instructions 59200 Rev. A dated 12/29/83; or 59163 Rev. A dated 12/29/83, or later FAA approved revision. FAA 8110-2 ( 10/24) Page 2 of __ SA5581SW 05/27/2025 2 ## Every issue (2) - May 27, 2025: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/99/53/995364e48078d724ae42a9f4e29a145c1d20a183887a9d0f99cedab6f9760b56) - September 30, 2002: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/e0/50/e050a20df11b68446ffc14b70c274376bebcfff847ba7dd68c599d930fef688d) --- From OpenAirDocs.org, an independent open copy of FAA data. Only the Federal Register edition on govinfo.gov is the official legal text of an AD.