SH877SO
Installation of tail rotor guard assembly. Held by Jungle Aviation & Radio Service, INC., which holds 16 approved modifications in all. Last revised February 2, 1976. System: rotorcraft systems.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Hiller Aviation; Rogerson Hiller Corporation
- Models
- UH-12D (Army UH-23D), UH-12E
- Type certificates
- 4H10, 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 22, 2026.