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

SA3027SO

Installation of the Basic Aircraft Products air driven alternator, Type BPE-14, Model 1008. Held by Basic Aircraft Products INC, which holds 12 approved modifications in all. Last revised October 8, 1991. System: electrical power.

What it applies to

Kind of product
Aircraft
Design holder
Booth Lee F. dba Taylorcraft Aerospace
Models
BC12-D
Type certificate
A-696
On this site
Taylorcraft BC12 BC-12D 1,225 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 20, 2026.