SA10921SC
Installation of an alternator and regulator as a replacement to existing OEM generators and mechanical voltage regulators. Held by Hartzell Engine Technologies, LLC, which holds 45 approved modifications in all. Last revised July 17, 2014. System: electrical power.
What it applies to
- Kind of product
- Aircraft
- Design holder
- AD Holdings Inc; Aerodifusion S.L.; Aircraft Parts & Development Corp.; All American Aircraft Inc.; 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 Jodel; Avions Jodel; Avions Jodel; Beechcraft Corporation; Beechcraft Corporation; Beechcraft Corporation; Beechcraft Corporation; Beechcraft Corporation; Beechcraft Corporation; Beechcraft Corporation; Beechcraft Corporation; Beechcraft Corporation; Beechcraft Corporation; 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; Commonwealth Aircraft Inc.; FS 2001 Corp.; Good Earthkeeping Organization Inc; Good Earthkeeping Organization Inc; Good Earthkeeping Organization Inc; Goodyear Aircraft Corporation; Helio Aircraft Corporation; JGS Properties LLC; Kearns Edward Scott; 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.; McClish Thomas H.; MICCO Aircraft Company; MICCO Aircraft Company; Mooney International Corporation; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Rogers Burl A.; Rogers Burl A.; Sierra Hotel Aero Inc.; Sierra Hotel Aero Inc.; SOCATA; SOCATA; SOCATA; Superior Aircraft Company; Superior Aircraft Company; Swift Museum Foundation Inc.; Swift Museum Foundation Inc.; Taylorcraft 2000 LLC; Taylorcraft 2000 LLC; Taylorcraft 2000 LLC; Univair Aircraft Corporation; Univair Aircraft Corporation; Univair Aircraft Corporation; Univair Aircraft Corporation; Univair Aircraft Corporation; Univair Aircraft Corporation; Univair Aircraft Corporation; Univair Aircraft Corporation; Univair Aircraft Corporation; Univair Aircraft Corporation
- Models
- T-211, D-1190S, A-3, 10A, 402, 7EC, 7ECA, 7FC, 7JC, S7EC, 150, D-1190, DR-1050, 35, 35R, 45 (Military YT-34), A35, B35, C35, D35, E35, F35, G35, 120, 140, 140A, 150, 150A, 150B, 150C, 150D, 150E, 150F, 150G, 150H, 150J, 150K, 150L, 150M, 170, 170A, 170B, 172, 172A, 172B, 172C, 172D, 172E, 172G, 172H (USAF T-41A), A150K, A150L, A150M, R172F, R172G, R172H, 185, J5A (Army L-4F), 8E, 8F, T-8F, GA-22A, 15A, 11A, Trojan A-2, Bee Dee M-4, M-4-210, M-4-210C, M-4-210S, M-4-210T, M-4, M-4C, M-4S, M-4T, M-5-210C, B85C, MAC-125C, MAC-145, M20K, J3C-65 (Army L-4; L-4A; L-4B (Navy NE-1); L-4H; L-4J...
- Type certificates
- A-791, A11IN, A-758, A-792, A3CE, A-759, A-759, A-759, A-759, A-759, A14IN, A10IN, A4IN, A-777, A-777, 5A3, A-777, A-777, A-777, A-777, A-777, A-777, A-777, A-768, A-768, 5A2, 3A19, 3A19, 3A19, 3A19, 3A19, 3A19, 3A19, 3A19, 3A19, 3A19, 3A19, 3A19, 3A19, A-799, A-799, A-799, 3A12, 3A12, 3A12, 3A12, 3A12, 3A12, 3A12, 3A12, 3A19, 3A19, 3A19, 3A17, 3A17, 3A17, A-729, A-725, A-694, A-694, A-694, 1A12, 3A3, A-804, A-801, 3A23, 3A23, 3A23, 3A23, 3A23, 3A23, 3A23, 3A23, 3A23, 3A23, A-715, 3A1, 3A1, 2A3, A-691, A-691, A-703, A-740, 1A2, 1A2, 1A2, 1A2, 2A13, 2A13, 2A13, A7SO, A7SO, A-802, A-802, A-782, A-782, 7A14, 7A14, 7A14, A-778, A-778, A-766, A-766, 1A9, A-696, A-696, A-718, A-718, A-787, A-787, A-787, A-787, A-787, A-787, A-787, A-787
- On this site
- Aeronca S15 13 registered
American Champion Aircraft 7 Citabria and Champ 429 registered
American Champion Aircraft 8 Decathlon and Scout 668 registered
Beechcraft 19 41 registered
Beechcraft 35 Bonanza and Debonair 1,077 registered
Beechcraft A35 160 registered
Beechcraft B35 148 registered
Beechcraft C35 258 registered
Beechcraft D35 142 registered
Beechcraft E35 141 registered
Beechcraft F35 192 registered
Beechcraft G35 224 registered
Cessna A150 232 registered
Cessna R172 Hawk XP 758 registered
Champion 402 8 registered
Emigh TROJAN A-2 14 registered
Indus Aviation Inc T-211 14 registered
Maule M-4 207 registered
Maule M-5 364 registered
Meyers MAC-145 14 registered
Piper J-3 Cub 3,806 registered
Piper PA-18 Super Cub 3,621 registered
Piper PA-19 15 registered
Piper PA-28 Cherokee, Warrior, Archer and Arrow 18,619 registered
Piper PA-34 Seneca 998 registered
Taylorcraft BC12 BC-12D 1,225 registered
Taylorcraft BCS12 17 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 5, 2026.