SH3301SO
Installation of a Freon Air Conditioning System in accordance with Aero Aire Corporation Master Drawing List No. 500R010, Rev. 2, dated 5/26/1992, or later FAA approved revision. Held by Enviro Systems INC., which holds 15 approved modifications in all. Last revised June 20, 2003. System: heating, ice protection and utility systems.
What it applies to
- Kind of product
- Aircraft
- Design holder
- MD Helicopter Inc.; MD Helicopter Inc.
- Models
- 369E, 500N
- Type certificates
- H3WE, H3WE
- On this site
- Md Helicopters Inc 369 108 registered
Md Helicopters Inc 500 14 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.