SA4772NM
Installation of Lund Flying Service forward spray boom. Held by Lund Flying Service INC. Last revised August 18, 1994. System: other and general.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Ag Cat Corporation; Ag Cat Corporation; Air Tractor Inc.; Ayres Corporation
- Models
- G-164B, G-164A, AT-301, S2R
- Type certificates
- 1A16, 1A16, A9SW, A3SW
- On this site
- Ag-Cat Corporation G-164 5 registered
Air Tractor Inc AT-301 84 registered
Ayres Corporation S-2 244 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.