Type certificate A-691
Held today by Piper Aircraft INC.. It covers 7 models; about 4,249 aircraft on the U.S. register are built to the designs it names. Last revised March 8, 2011 (revision 34). 21 FAA orders name its designs, and 248 approved modifications build on it.
Models under this certificate 7
J3C-65 (Army L-4; L-4A; L-4B (Navy NE-1); L-4H; L-4J (Navy NE-2)), PA-11, J3C-40, PA-11S, J3C-65S, J3C-50, J3C-50S
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 21 · newest first
2025-03-202025-02-11 · Rudder Structure · flight controls
2015-06-032015-08-04 · Wings · landing gear
2014-01-1499-01-05 R1 · Wings · landing gear
2006-03-102006-03-08 · Vacuum pumps · instruments and avionics
2001-12-282001-23-17 · GNS 430 units · instruments and avionics
1999-02-0899-01-05 · Wing Lift Struts or Forks · landing gear
1996-06-0796-09-06 · Air Filter Assemblies · airframe structure
1993-07-0993-10-06 · Corroded Wing Lift Struts or Cracked Forks · airframe structure
Approved modifications 248 · 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/A-691.json.