SA02268CH (PAGE 1)
Installation of Airwolf Filter Corp. Air Oil Separator. Held by Airwolf Filter Corporation, which holds 61 approved modifications in all. Last revised June 4, 2020. System: other and general.
What it applies to
- Kind of product
- Aircraft
- Design holder
- AD Aerospace Inc.; AD Aerospace Inc.; Aermacchi S.p.A.; Aermacchi S.p.A.; Aermacchi S.p.A.; Aermacchi S.p.A.; Aermacchi S.p.A.; Aermacchi S.p.A.; Aermacchi S.p.A.; Aermacchi S.p.A.; Aermacchi S.p.A.; Aermacchi S.p.A.; Aermacchi S.p.A.; Aermacchi S.p.A.; Aermacchi S.p.A.; Aero Acquisitions LLC; Aero Acquisitions LLC; Aero Acquisitions LLC; Aero Acquisitions LLC; Aeronautica Macchi S.p.A. & Aerfer-Industrie Aerospaziali Meridionali S.p.A.; Aerostar Aircraft Corporation; Aerostar Aircraft Corporation; Aerostar Aircraft Corporation; Aerostar Aircraft Corporation; Aerostar Aircraft Corporation; Aerotek II Inc.; Aerotek II Inc.; Aerotek II Inc.; Aerotek II Inc.; Agusta S.p.A.; Agusta S.p.A.; Air Tractor Inc.; Air Tractor Inc.; Air Tractor Inc.; Air Tractor Inc.; Air Tractor Inc.; Air Tractor Inc.; Air Tractor Inc.; Air Tractor Inc.; Air Tractor Inc.; Alexandria Aircraft LLC; Alexandria Aircraft LLC; Alexandria Aircraft LLC; Alexandria Aircraft LLC; Alexandria Aircraft LLC; Alexandria Aircraft LLC; Alexandria Aircraft LLC; Alexandria Aircraft LLC; Alexandria Aircraft LLC; Alexandria Aircraft LLC; Allied Ag Cat Productions Inc.; Allied Ag Cat Productions Inc.; Allied Ag Cat Productions Inc.; Allied Ag Cat Productions Inc.; Allied Ag Cat Productions Inc.; Alpha Aviation Concept Limited; 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.; 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.; APEX Aircraft; APEX Aircraft; Arizona Aerospace Foundation; Arizona Aerospace Foundation; Arizona Aerospace Foundation; Arizona Aerospace Foundation; Augustair Inc.; Augustair Inc.; Augustair Inc.; B-N Group Ltd.; B-N Group Ltd.; B-N Group Ltd.; B-N Group Ltd.; B-N Group Ltd.; B-N Group Ltd.; B-N Group Ltd.; B-N Group Ltd.; B-N Group Ltd.; B-N Group Ltd.; B-N Group Ltd.; B-N Group Ltd.; B-N Group Ltd.; B-N Group Ltd.; B-N Group Ltd.; B-N Group Ltd.; B-N Group Ltd.; B-N Group Ltd.; Bell Helicopter Textron; Bell Helicopter Textron; Bell Helicopter Textron; Bell Helicopter Textron; Bell Helicopter Textron; Bell Helicopter Textron; Bell Helicopter Textron; Bell Helicopter Textron; Bell Helicopter Textron; Bell Helicopter Textron; Bell Helicopter Textron; Bell Helicopter Textron; Bell Helicopter Textron; Bell Helicopter Textron; Bellanca Aircraft Corporation; Bellanca Aircraft Corporation; Bellanca Aircraft Corporation; Bellanca Aircraft Corporation; Boeing Airplane Company Wichita Division; Boeing Airplane Company Wichita Division; Boeing Airplane Company Wichita Division; Boeing Airplane Company Wichita Division; Boeing Airplane Company Wichita Division; Boeing Airplane Company Wichita Division; Boeing Airplane Company Wichita Division; Boeing Airplane Company Wichita Division; Boeing Airplane Company Wichita Division; Boeing Airplane Company Wichita Division; Boeing Airplane Company Wichita Division; Boeing Airplane Company Wichita Division; BOHICA Incorporated; BOHICA Incorporated; BOHICA Incorporated; British Aerospace Aircraft Group; Bushmaster Aircraft Corporation; Central Air Service Inc.; Central Air Service Inc.; Central Air Service Inc.; Central Air Service Inc.; Central Air Service Inc.; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Chance Vought; Chance Vought; Chance Vought; Chance Vought; Civil Air Patrol Incorporated; Commonwealth Aircraft Inc.; Commonwealth Aircraft Inc.; Consolidated Vultee Aircraft Corporation Stinson Division; Consolidated Vultee Aircraft Corporation Stinson Division; Consolidated Vultee Aircraft Corporation Stinson Division; Consolidated Vultee Aircraft Corporation Stinson Division; Consolidated Vultee Aircraft Corporation Stinson Division; Consolidated Vultee Aircraft Corporation Stinson Division; Consolidated Vultee Aircraft Corporation Stinson Division; Consolidated Vultee Aircraft Corporation Stinson Division; Consolidated Vultee Aircraft Corporation Stinson Division; Consolidated Vultee Aircraft Corporation Stinson Division; Cub Crafters Inc.; Cub Crafters Inc.; Krogmann Carl F.; Rogers Burl A.; Rogers Burl A.; Scotts-Bell 47 Inc; Scotts-Bell 47 Inc; Scotts-Bell 47 Inc; Scotts-Bell 47 Inc; Scotts-Bell 47 Inc; Scotts-Bell 47 Inc; Scotts-Bell 47 Inc; Scotts-Bell 47 Inc; Scotts-Bell 47 Inc; STOL Aircraft Corporation; STOL Aviation LLC; STOL Aviation LLC; STOL Aviation LLC; STOL Aviation LLC; Viking Air Limited
- Models
- T-11, T-211, F.260, F.260B, F.260C, F.260D, F.260E, F.260F, S.205 - 18/F, S.205 - 18/R, S.205 - 20/F, S.205 - 20/R, S.205 - 22/R, S.208, S.208A, MAC-125C, MAC-145, MAC-145A, MAC-145B, AM-3, PA-60-600 (Aerostar 600), PA-60-601 (Aerostar 601), PA-60-601P (Aerostar 601P), PA-60-602P (Aerostar 602P), PA-60-700P (Aerostar 700P), B-1, B-1A, B-1, B-1A, AB-102, S.210, AT-401, AT-401B, AT-501, AT-250, AT-300, AT-301, AT-302, AT-400, AT-400A, 14-19, 14-19-2, 14-19-3, 14-19-3A, 17-30, 17-31, 17-31TC, 17-30A, 17-31A, 17-31ATC, G-164, G-164A, G-164B, G-164C, G-164D, R2160, 7AC, 7ACA, 7BCM (Army L-16A),...
- Type certificates
- A-791, A-791, A10EU, A10EU, A10EU, A10EU, A10EU, A10EU, A9EU, A9EU, A9EU, A9EU, A9EU, A9EU, A9EU, 3A1, 3A1, 3A1, 3A1, A19EU, A17WE, A17WE, A17WE, A17WE, A17WE, A7WE, A7WE, A8WE, A8WE, 7H3, A25EU, A17SW, A17SW, A17SW, A9SW, A9SW, A9SW, A9SW, A9SW, A9SW, 1A3, 1A3, 1A3, 1A3, 1A3, 1A3, 1A3, A18CE, A18CE, A18CE, 1A16, 1A16, 1A16, 1A16, 1A16, A48EU, 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, A-759, A-761, A-761, A-761, A-761, A-796, A-796, A21CE, A21CE, A36EU, A66EU, A-746, A-746, A-746, A-746, 4A19, 4A19, 4A19, A17EU, A17EU, A17EU, A17EU, A17EU, A17EU, A17EU, A17EU, A17EU, A17EU, A17EU, A17EU, A17EU, A17EU, A17EU, A29EU, A29EU, A29EU, 2H1, 2H1, 2H1, 2H1, 2H3, 2H3, 2H3, 2H3, 2H3, 2H3, 2H3, 2H3, 2H3, 2H3, A-773, A-773, A-773, A-773, A-743, A-743, A-743, A-743, A-743, A-743, A-743, A-743, A-743, A-743, A-743, A-743, A15EA, A15EA, A15EA, A11EU, A19WE, A36CE, A36CE, A36CE, A36CE, A36CE, 3A12, 3A12, 3A12, 3A12, 3A12, 3A12, 3A12, 3A12, 3A12, 3A12, 3A12, 3A12, 3A12, 3A12, 3A12, 3A12, 3A12, 3A12, 3A17, 3A17, 3A17, 3A17, 3A17, 3A17, 3A17, 3A17, 3A17, 3A17, 3A17, 3A17, 3A19, 3A19, 3A19, 3A19, 3A19, 3A19, 3A19, 3A19, 3A19, 3A19, 3A19, 3A19, 3A19, 3A19, 3A19, 3A19, 3A19, 3A19, 5A2, A-722, A-768, A-768, A-799, A-799, A-799, A13EU, A13EU, A13EU, A13EU, A13EU, A13EU, A13EU, A13EU, A13EU, A13EU, A13EU, A13EU, A23EU, A23EU, A23EU, A23EU, A23EU, A23EU, A23EU, A23EU, A26EU, A42EU, A42EU, A42EU, A4EU, A4EU, A4EU, A4EU, A4EU, A4EU, A4EU, A4EU, A4EU, A4EU, LTC-24, LTC-24, LTC-24, LTC-24, AR-33, A-729, A-729, A-2-571, A-2-571, A-2-571, A-2-571, A-764, A-764, A-764, A-764, A-764, A-764, A00006SE, A00006SE, LTC-20, A-802, A-802, H-1, H-1, H-1, H-1, H-1, H-1, H-1, H-1, H-1, A6EA, A-737, A-737, A-737, A-737, A-815
- On this site
- Aeronca S11 9 registered
Aeronca S15 13 registered
Aeronca S7 7 registered
Agusta Spa F.260D 11 registered
Air Tractor Inc AT-301 83 registered
Air Tractor Inc AT-400 49 registered
Air Tractor Inc AT-401 68 registered
Avions Mudry Et Cie CAP 10 22 registered
Bell 47 478 registered
Bellanca 14 282 registered
Bellanca 17 Viking 628 registered
Boeing A75 Stearman Kaydet 979 registered
Boeing IB75 12 registered
Britten-Norman BN-2 54 registered
Cessna 172 Skyhawk 20,675 registered
Cessna A150 232 registered
Cessna A152 48 registered
Cessna P172 23 registered
Cessna R172 Hawk XP 758 registered
Champion 7 Citabria and Champ 1,452 registered
Consolidated Vultee BT-15 8 registered
Cub Crafters CC18 33 registered
Downer 14 7 registered
Estumkeda Ltd Dba Micco Acft MAC-145 15 registered
Indus Aviation Inc T-211 14 registered
Interstate S-1 104 registered
Meyers MAC-145 14 registered
Pilatus Britten-Norman Ltd. BN-2 13 registered
Piper PA-60 Aerostar 57 registered
Schweizer Aircraft Corp G-164 64 registered
Siai-Marchetti F.260 7 registered
Siai-Marchetti F.260C 17 registered
Siai-Marchetti S.205/22R 22 registered
Taylorcraft DC-65 49 registered
Taylorcraft DCO-65 195 registered
Taylorcraft DF-65 7 registered
Thurston TSC-1 5 registered
Varga Aircraft Corp. 2180 14 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 22, 2026.