Type certificate 4H11
Held today by Siam Hiller Holdings INC., earlier by Hiller Aviation\Fairchild Hiller\Rogerson Hiller\Siam Hiller\Hiller Aircraft Corporation. It covers 2 models; about 217 aircraft on the U.S. register are built to it. Last revised January 6, 2010 (revision 18). 60 FAA orders name its designs, and 81 approved modifications build on it.
Models under this certificate 2
UH-12E, UH-12E-L
On this site
The data sheet on the FAA's site: the approved engines and propellers, weights, speeds and limits for each model.
FAA orders on these designs 60 · newest first
2025-09-242025-15-02 · Main Rotor Mast/Swashplate · rotorcraft systems
2023-06-222023-11-07 · Ground Proximity System · instruments and avionics
2021-12-092021-23-13 · Ground Proximity System · instruments and avionics
2001-01-102000-24-21 · Control System Linkage · other and general
1997-11-1297-20-15 · Outboard Tension-Torsion Bar Pin · rotorcraft systems
1997-06-2797-10-16 · Blade Spar Tube and Cuff Inspection · rotorcraft systems
1991-03-0790-15-01 · Tail Rotor Blade Assemblies · rotorcraft systems
1986-11-0386-22-04 · Main Rotor Blades · rotorcraft systems
Approved modifications 81 · companies holding the most
Source: FAA type certificate data sheets (Dynamic Regulatory System); register counts from the FAA register of October 5, 2026. Connections as data: /graph/certificate/4H11.json.