SH3362NM
Installation of a Tail Rotor Blade Protective Coating. Held by Columbia Helicopters INC, which holds 66 approved modifications in all. Last revised April 22, 1986. System: rotorcraft systems.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Hiller Aviation; Hiller Aviation; Hiller Aviation; Siam Hiller Holdings Inc.; Siam Hiller Holdings Inc.
- Models
- UH-12D, UH-12L, UH-12L4, UH-12E-L, UH-12E
- Type certificates
- 4H10, H1WE, H1WE, 4H11, 4H11
- On this site
- 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 20, 2026.