SA4321NM
Installation of an oil filter, filter base and mounting plate on the firewalls of those airplanes listed on AML No SA4321NM that are equipped with an FAA approved Continental model IO-470 engine installation which has been modified by the installation of an external mounted full flow oil adapter and spin-on oil filter. Held by Timberman Allen e, which holds 15 approved modifications in all. Last revised July 30, 1993. System: engine.
What it applies to
- Kind of product
- Aircraft
- Design holder
- 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; Hawker Beechcraft Corporation; Hawker Beechcraft Corporation; Hawker Beechcraft Corporation; Hawker Beechcraft Corporation; Hawker Beechcraft Corporation; Hawker Beechcraft Corporation; Hawker Beechcraft Corporation; Hawker Beechcraft Corporation; Hawker Beechcraft Corporation; Hawker Beechcraft Corporation; Hawker Beechcraft Corporation; Hawker Beechcraft Corporation; Hawker Beechcraft Corporation; Hawker Beechcraft Corporation; Hawker Beechcraft Corporation; Hawker Beechcraft Corporation; Hawker Beechcraft Corporation; Twin Commander Aircraft LLC
- Models
- 185, 185A, 185B, 185C, 185D, 185E, 210-5 (205), 210-5A (205A), 210, 210A, 210B, 210C, 210D, 210E, 310C, 310D, 310E, 310F, 310G, 310H, 310I, 310J-1, 310J, 310K, 310L, 310N, 310P, 310Q, E310H, E310J, 35-33, 35-A33, 35-B33, 35-C33, 95-55, 95-A55, 95-B55, 95-B55A, 95-B55B, E33, F33, G33, H35, J35, K35, M35, P35, 500-A
- Type certificates
- 3A24, 3A24, 3A24, 3A24, 3A24, 3A24, 3A21, 3A21, 3A21, 3A21, 3A21, 3A21, 3A21, 3A21, 3A10, 3A10, 3A10, 3A10, 3A10, 3A10, 3A10, 3A10, 3A10, 3A10, 3A10, 3A10, 3A10, 3A10, 3A10, 3A10, 3A15, 3A15, 3A15, 3A15, 3A16, 3A16, 3A16, 3A16, 3A16, 3A15, 3A15, 3A15, 3A15, 3A15, 3A15, 3A15, 3A15, 6A1
- On this site
- Beechcraft 35 Bonanza and Debonair 1,077 registered
Beechcraft 95 Travel Air and Baron 55 1,245 registered
Beechcraft E33 135 registered
Beechcraft F33 Bonanza 1,008 registered
Beechcraft G33 41 registered
Beechcraft H35 224 registered
Beechcraft J35 221 registered
Beechcraft K35 Bonanza 236 registered
Beechcraft M35 225 registered
Beechcraft P35 319 registered
Cessna 185 Skywagon 227 registered
Cessna 210 Centurion 1,526 registered
Cessna 310 1,410 registered
Cessna 500 Citation I 63 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.