SR01845SE
Installation of a barrier air filtration system. Held by Cascade Flying Service LLC, which holds 7 approved modifications in all. Last revised March 23, 2018. System: other and general.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Scotts-Bell 47 Inc; Scotts-Bell 47 Inc; Scotts-Bell 47 Inc; Scotts-Bell 47 Inc; Scotts-Bell 47 Inc; Scotts-Bell 47 Inc; Scotts-Bell 47 Inc; Scotts-Bell 47 Inc; Scotts-Bell 47 Inc; Scotts-Bell 47 Inc; Scotts-Bell 47 Inc; Siam Hiller Holdings Inc.; Siam Hiller Holdings Inc.
- Models
- 47G-2A-1, 47G-2A, 47G-3, 47G-3B-1, 47G-3B-2, 47G-3B-2A, 47G-3B, 47G-4, 47G-4A, 47G-5, 47G-5A, UH-12E-L, UH-12E
- Type certificates
- 2H3, 2H3, 2H3, 2H3, 2H3, 2H3, 2H3, 2H3, 2H3, 2H3, 2H3, 4H11, 4H11
- On this site
- Bell-Carson 47 5 registered
Bell 47 478 registered
Hiller UH-12 217 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 22, 2026.