The U.S. aircraft register, updated daily
Approved modifications · supplemental type certificate · current · amended

SA2557NM (1 OF 2)

Installation of KS Avionics EGT/CHT-2( ) combined exhaust gas and cylinder head temperature monitoring system. Held by K S Avionics INC, which holds 6 approved modifications in all. Last revised February 22, 2007. System: engine.

What it applies to

Kind of product
Aircraft
Design holder
Aermacchi S.p.A.; Aerostar Aircraft Corporation; American Champion Aircraft Corp.; American Champion Aircraft Corp.; American Champion Aircraft Corp.; American Champion Aircraft Corp.; American Champion Aircraft Corp.; American Champion Aircraft Corp.; American Champion Aircraft Corp.; American Champion Aircraft Corp.; American Champion Aircraft Corp.; American Champion Aircraft Corp.; American Champion Aircraft Corp.; American Champion Aircraft Corp.; American Champion Aircraft Corp.; American Champion Aircraft Corp.; American Champion Aircraft Corp.; American Champion Aircraft Corp.; American Champion Aircraft Corp.; American Champion Aircraft Corp.; American Champion Aircraft Corp.; American Champion Aircraft Corp.; American Champion Aircraft Corp.; American Champion Aircraft Corp.; Avions Pierre Robin; Beech Aircraft Corporation; Beech Aircraft Corporation; Beech Aircraft Corporation; Beech Aircraft Corporation; Bellanca Aircraft Corporation; Bellanca Aircraft Corporation; Bellanca Aircraft Corporation; Bellanca Aircraft Corporation; Bellanca Aircraft Corporation; Bellanca Aircraft Corporation; Bellanca Aircraft Corporation; Bellanca Aircraft Corporation; Bellanca Aircraft Corporation; Bellanca Aircraft Corporation; Bellanca Aircraft Corporation; Booth Lee F.dba Taylorcraft Aerospace; Booth Lee F. dba Taylorcraft Aerospace; Booth Lee F. dba Taylorcraft Aerospace; Booth Lee F. dba Taylorcraft Aerospace; Booth Lee F. dba Taylorcraft Aerospace; Booth Lee F. dba Taylorcraft Aerospace; Booth Lee F. dba Taylorcraft Aerospace; Booth Lee F. dba Taylorcraft Aerospace; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; Dynac Aerospace Corporation; Dynac Aerospace Corporation; Dynac Aerospace Corporation; Martin-Marietta Corporation; Maule Aerospace Technology Inc.; Maule Aerospace Technology Inc.; Maule Aerospace Technology Inc.; Maule Aerospace Technology Inc.; Maule Aerospace Technology Inc.; Maule Aerospace Technology Inc.; Maule Aerospace Technology Inc.; Maule Aerospace Technology Inc.; Maule Aerospace Technology Inc.; Maule Aerospace Technology Inc.; Maule Aerospace Technology Inc.; Maule Aerospace Technology Inc.; Maule Aerospace Technology Inc.; Maule Aerospace Technology Inc.; Maule Aerospace Technology Inc.; Maule Aerospace Technology Inc.; Maule Aerospace Technology Inc.; Maule Aerospace Technology Inc.; Maule Aerospace Technology Inc.; Maule Aerospace Technology Inc.; Maule Aerospace Technology Inc.; Mooney Aircraft Corporation; Mooney Aircraft Corporation; Mooney Aircraft Corporation; Mooney Aircraft Corporation; Mooney Aircraft Corporation; Mooney Aircraft Corporation; Mooney Aircraft Corporation; Mooney Aircraft Corporation; Mooney Aircraft Corporation; Mooney Aircraft Corporation; Mooney Aircraft Corporation; Navion Aircraft Company Ltd.; Navion Aircraft Company Ltd.; Navion Aircraft Company Ltd.; Navion Aircraft Company Ltd.; Navion Aircraft Company Ltd.; Navion Aircraft Company Ltd.; Navion Aircraft Company Ltd.; Navion Aircraft Company Ltd.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; Prop-Jets Inc.; Prop-Jets Inc.; Prop-Jets Inc.; Prop-Jets Inc.; Prop-Jets Inc.; Raytheon Aircraft Company; Raytheon Aircraft Company; Raytheon Aircraft Company; Raytheon Aircraft Company; Raytheon Aircraft Company; Raytheon Aircraft Company; Raytheon Aircraft Company; Raytheon Aircraft Company; Raytheon Aircraft Company; Raytheon Aircraft Company; Raytheon Aircraft Company; Raytheon Aircraft Company; Raytheon Aircraft Company; Raytheon Aircraft Company; Raytheon Aircraft Company; Raytheon Aircraft Company; Raytheon Aircraft Company; Raytheon Aircraft Company; Raytheon Aircraft Company; Raytheon Aircraft Company; Raytheon Aircraft Company; Raytheon Aircraft Company; Raytheon Aircraft Company; Raytheon Aircraft Company; Raytheon Aircraft Company; Raytheon Aircraft Company; Raytheon Aircraft Company; Raytheon Aircraft Company; Raytheon Aircraft Company; Raytheon Aircraft Company; Raytheon Aircraft Company; REVO Incorporated; REVO Incorporated; REVO Incorporated; REVO Incorporated; REVO Incorporated; Sky Enterprises Inc.; Sky International Inc.; Sky International Inc.; Sky International Inc.; Sky International Inc.; Sky International Inc.; Sky International Inc.; Sky International Inc.; SOCATA - Groupe Aerospatiale; Swift Museum Foundation Inc.; Swift Museum Foundation Inc.; Tiger Aircraft LLC; Tiger Aircraft LLC; Tiger Aircraft LLC; Tiger Aircraft LLC; Tiger Aircraft LLC; Tiger Aircraft LLC; Tiger Aircraft LLC; Twin Commander Aircraft Corporation; Twin Commander Aircraft Corporation; Twin Commander Aircraft Corporation; Twin Commander Aircraft Corporation; Twin Commander Aircraft Corporation; Twin Commander Aircraft Corporation; Twin Commander Aircraft Corporation; Twin Commander Aircraft Corporation; Twin Commander Aircraft Corporation; Twin Commander Aircraft Corporation; Twin Commander Aircraft Corporation; Twin Commander Aircraft Corporation; Twin Commander Aircraft Corporation; Twin Commander Aircraft Corporation; Twin Commander Aircraft Corporation; Univair Aircraft Corporation; Univair Aircraft Corporation; Univair Aircraft Corporation; Univair Aircraft Corporation; Univair Aircraft Corporation
Models
S.205-22/R, PA-60 Series, 7GCB, 7GCA, 7AC, 7ACA, S7AC, 7BCM (L-16A), 7CCM (L-16B), S7CCM, 7DC, 7EC, 7ECA, 7GC, 7GCAA, 7FC, 7GCBA, 7GCBC, 7HC, 7JC, 7KC, 7KCAB, 8GCBC, 8KCAB, R2160, D18C-T, 17 Series, SC17R, C17R (Army UC-43E), 17-31TC, 14-19, 14-19-2, 14-19-3, 14-19-3A, 17-30, 17-31, 14-13-3W, 14-13-3, 14-13-2, 14-13, F21, F19, F21B, F22, F21A, F22C, F22B, F22A, 310, 172, 182, 175, 150, 210, 185, 320, 305 Series, 180, 190, 170, 177, 207, 177RG, 336, T303, 206, 337, 401, 100-180, 100A, 100, 404, Bee Dee M-4-220S, Bee Dee M-6-235, Bee Dee M-5-235C, Bee Dee M-5-220C, Bee Dee M-5-210TC, Bee Dee...
Type certificates
A9EU, A17WE, A-759, A-759, A-759, A-759, A-759, A-759, A-759, A-759, A-759, A-759, A-759, A-759, A-759, A-759, A-759, A-759, A-759, A-759, A-759, A-759, A21CE, A21CE, A48EU, 770, ATC 602, ATC 604, ATC 604, 1A3, 1A3, 1A3, 1A3, 1A3, 1A3, 1A3, A-773, A-773, A-773, A-773, 1A9, 1A9, 1A9, 1A9, 1A9, 1A9, 1A9, 1A9, 3A10, 3A12, 3A13, 3A17, 3A19, 3A21, 3A24, 3A25, 5A5, 5A6, A-790, A-799, A13CE, A16CE, A20CE, A2CE, A34CE, A4CE, A6CE, A7CE, 1A21, 1A21, 1A21, 1A7, 3A23, 3A23, 3A23, 3A23, 3A23, 3A23, 3A23, 3A23, 3A23, 3A23, 3A23, 3A23, 3A23, 3A23, 3A23, 3A23, 3A23, 3A23, 3A23, 3A23, 3A23, 2A3, 2A3, 2A3, 2A3, 2A3, 2A3, 2A3, 2A3, 2A3, 2A3, A6SW, A-782, A-782, A-782, A-782, A-782, A-782, A-782, A-782, 1A10, 1A15, 1A2, 1A4, 1A6, 2A10, 2A13, 2A8, A18SO, A19SO, A1EA, A25SO, A3SO, A7SO, A8EA, 3A18, 3A18, 3A18, 3A18, 3A18, 3A15, 3A15, 3A15, 3A16, 3A16, 3A16, 3A16, 3A16, 3A20, 3A20, 5A3, 5A3, 5A4, 630, 630, 641, 710, 710, 713, A-684, A-757, A-765, A-765, A-777, A12CE, A1CE, A1CE, A1CE, A23CE, A29CE, A30CE, 1A13, 1A13, 1A13, 1A13, 1A13, A-769, A22NM, A8SO, A8SO, A8SO, A8SO, A8SO, A8SO, A17SO, A-766, A-766, A11EA, A11EA, A11EA, A11EA, A16EA, A16EA, A16EA, 2A4, 2A4, 2A4, 2A4, 2A4, 2A4, 6A1, 6A1, 6A1, 6A1, 6A1, 6A1, 6A1, 6A1, 6A1, A-767, A-767, A-767, A-767, A-767
On this site
Aero Commander 100 166 registered
Aero Commander 680 51 registered
Aeronca S7 7 registered
Aerostar Acft Corp Of Texas M20 23 registered
American Aviation AA-1 207 registered
American Blimp Corp A-1 5 registered
American Champion Aircraft 7 Citabria and Champ 429 registered
American Champion Aircraft 8 Decathlon and Scout 668 registered
American AA-5 127 registered
Beechcraft 65 201 registered
Bellanca 14 282 registered
Cessna 177 Cardinal 2,158 registered
Cessna T303 59 registered
Champion 7 Citabria and Champ 1,452 registered
Consolidated Aeronautics Inc. LAKE LA-4 15 registered
Consolidated Aeronautics Inc. LAKE LA-4-200 140 registered
Downer 14 7 registered
Maule BEE DEE M-4-210 5 registered
Navion NAVION D 5 registered
Navion NAVION F 6 registered
Navion NAVION G 61 registered
Navion NAVION H 36 registered
Piper PA-20 Pacer 323 registered
Piper PA-22 Tri-Pacer and Colt 2,940 registered
Piper PA-23 Apache and Aztec 1,316 registered
Piper PA-24 Comanche 2,428 registered
Piper PA-25 Pawnee 455 registered
Piper PA-28 Cherokee, Warrior, Archer and Arrow 18,633 registered
Piper PA-30 Twin Comanche 879 registered
Piper PA-31 Navajo and Chieftain 935 registered
Piper PA-32 Cherokee Six, Lance and Saratoga 3,917 registered
Piper PA-34 Seneca 998 registered
Piper PA-38 Tomahawk 442 registered
Piper PA-44 Seminole 599 registered
Piper PA-46 Malibu, Mirage, Matrix and M-Class 1,692 registered
Piper PA-60 Aerostar 57 registered
Siai-Marchetti S.205/22R 22 registered
The FAA's record
On the FAA's site

What an approved modification is

A supplemental type certificate is the FAA's approval of a change to a certified design: a new engine or propeller, avionics, an autopilot, floats, a parachute, a larger fuel tank, an ice-protection kit. The company holding it may sell the kit and the paperwork to owners of the listed models; the modification then becomes part of that aircraft's record. The FAA's list says what was approved and for which models, not how many aircraft carry it.

Source: FAA supplemental type certificates (Dynamic Regulatory System). Register counts from the FAA register of October 8, 2026.