The U.S. aircraft register, updated daily
Approved modifications · supplemental type certificate · current · issued

SA4-288

BN-1 propeller spinner. Held by Raymond M Stits, which holds 6 approved modifications in all. Last revised January 1, 1960. System: propeller.

What it applies to

Kind of product
Aircraft
Design holder
Aeronca Aircraft Corporation; Aeronca Aircraft Corporation; Aeronca Aircraft Corporation; Aeronca Aircraft Corporation; Aeronca Aircraft Corporation; Aeronca Aircraft Corporation; Aeronca Aircraft Corporation
Models
KCA, 50-C, S-50-C, 65-C, (L-3F) 65-CA, S-65-CA, S-65-C
Type certificates
A-675, A-675, A-675, A-675, A-675, A-675, A-675
On this site
Aeronca 50 14 registered
Aeronca 65 Chief and Super Chief 377 registered
Aeronca KCA 8 registered
Aeronca S-65 6 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 21, 2026.