Type certificate H17NM
Held today by Silver Bay Logging INC., earlier by Sikorsky. It covers 1 model; about 5 aircraft on the U.S. register are built to it. Last revised June 30, 1995 (revision 1). 7 FAA orders name its designs, and 2 approved modifications build on it.
Models under this certificate 1
CH-54A
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 7 · newest first
2023-06-222023-11-07 · Ground Proximity System · instruments and avionics
2021-12-092021-23-13 · Ground Proximity System · instruments and avionics
2013-12-052013-20-15 · Tail Rotor Drive System · rotorcraft systems
2000-10-192000-18-14 · Second Stage Lower Planetary Plate · other and general
1999-08-2699-15-14 · Main Gearbox Assembly · airframe structure
1999-05-0699-07-16 · Second Stage Lower Planetary Plate · airframe structure
1976-03-2476-06-01 · Hydraulic Pumps · heating, ice protection and utility systems
Approved modifications 2 · companies holding the most
Source: FAA type certificate data sheets (Dynamic Regulatory System); register counts from the FAA register of October 7, 2026. Connections as data: /graph/certificate/H17NM.json.