SA433AL
Installation of Wilbur's tire- cushioned model 2300 skis. Held by Wilbur'S Flt Operations. Last revised December 16, 1971. System: landing gear.
What it applies to
- Kind of product
- Aircraft
- Design holder
- 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.
- Models
- Bee Dee M-4-180T, Bee Dee M-4-180S, Bee Dee M-4-180C, Bee Dee M-4-210C, Bee Dee M-4T, Bee Dee M-4S, Bee Dee M-4C, Bee Dee M-4, Bee Dee M-4-220C, Bee Dee M-4-210S, Bee Dee M-4-210T, Bee Dee M-4-220, Bee Dee M-4-210, Bee Dee M-4-220T, Bee Dee M-4-220S
- Type certificates
- 3A23, 3A23, 3A23, 3A23, 3A23, 3A23, 3A23, 3A23, 3A23, 3A23, 3A23, 3A23, 3A23, 3A23, 3A23
- On this site
- 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 20, 2026.