SA00433
Installation of Airwolf remote mounted engine oil filter Model AFC-500 or AFC-600 on multi engine fixed wing light aircraft incorporating Franklin reciprocating engines of 450 horsepower or less. (with Franklin engines). Held by Airwolf Filter Corporation, which holds 61 approved modifications in all. Last revised May 7, 1997. System: engine.
What it applies to
- Kind of product
- Aircraft
- Design holder
- 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; Commonwealth Aircraft Inc.; Commonwealth Aircraft 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.; Univair Aircraft Corporation; Univair Aircraft Corporation; Univair Aircraft Corporation; Univair Aircraft Corporation; Univair Aircraft Corporation
- Models
- 172B, 172F (USAF T-41A), 172D, 172, 172A, 172E, 172G, 172H (USAF T-41A), 172P, 172C, 172Q, 172I, 172N, 172M, 172L, 172K, 170B, 170A, 170, 180F, 190F, Bee Dee M-5-220C, Bee Dee M-4-210, Bee Dee M-4-210C, Bee Dee M-4-210S, Bee Dee M-4-210T, Bee Dee M-4-220, Bee Dee M-4-220C, Bee Dee M-4-220T, Bee Dee M-4-220S, 108, 108-1, 108-2, 108-3, 108-5
- Type certificates
- 3A12, 3A12, 3A12, 3A12, 3A12, 3A12, 3A12, 3A12, 3A12, 3A12, 3A12, 3A12, 3A12, 3A12, 3A12, 3A12, A-799, A-799, A-799, A-729, A-729, 3A23, 3A23, 3A23, 3A23, 3A23, 3A23, 3A23, 3A23, 3A23, A-767, A-767, A-767, A-767, A-767
- On this site
- Cessna 170 2,085 registered
Cessna 172 Skyhawk 20,675 registered
Cessna 180 Skywagon 2,605 registered
Cessna 190 74 registered
Maule BEE DEE M-4-210 5 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 21, 2026.