SA4356WE
Installation of two Albany Int'l dispersion pods, Dwg. No. 21940 or21961. Held by Ecogen, INC, which holds 4 approved modifications in all. Last revised April 28, 1993. System: other and general.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Air Tractor Inc.; Air Tractor Inc.; Air Tractor Inc.; Air Tractor Inc.
- Models
- AT-302, AT-400, AT-301, AT-300
- Type certificates
- A9SW, A9SW, A9SW, A9SW
- On this site
- Air Tractor Inc AT-301 84 registered
Air Tractor Inc AT-400 49 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.