SR09181RC
Fabrication of Simplex Model 304 fire attack system. Held by Simplex Manufacturing Company, which holds 60 approved modifications in all. Last revised September 30, 2013. System: other and general.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Bell Helicopter Textron Inc.; Bell Helicopter Textron Inc.; Bell Helicopter Textron Inc.; Bell Helicopter Textron Inc.; Bell Helicopter Textron Inc.; Hagglund Helicopters LLC
- Models
- 205A-1, 205B, 212, 412, 412EP, UH-1H
- Type certificates
- H1SW, H1SW, H4SW, H4SW, H4SW, H15NM
- On this site
- Bell 205 58 registered
Bell 212 59 registered
Bell 412 87 registered
Bell UH-1 Huey (Iroquois) 404 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 21, 2026.