Type certificate LTC-7
Held today by Holmes Douglas W.. It covers 1 model. Last revised February 28, 1947 (revision 2)..
Models under this certificate 1
R-4B (Army)
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 0 · newest first
None in the current files.
Source: FAA type certificate data sheets (Dynamic Regulatory System); register counts from the FAA register of October 22, 2026. Connections as data: /graph/certificate/LTC-7.json.