SA1165CE
Installation of air conditioning system, restricted category. Held by Honeywell International INC, which holds 599 approved modifications in all. Last revised September 30, 1975. System: heating, ice protection and utility systems.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Ayres Corporation
- Models
- 600 S2D
- Type certificate
- A4SW
- 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 22, 2026.