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

SA2114CE

Installation of Electro Delta VR300-28-50 Central Air Charter VR-0015, or Central Air Charter GR2850VI voltage regulator as a replacement for original Delco Remy 1119656 voltage regulator. Held by Central Air Charter, which holds 6 approved modifications in all. Last revised September 2, 1988. System: electrical power.

What it applies to

Kind of product
Aircraft
Design holder
Twin Commander Aircraft Corporation
Models
500-B
Type certificate
6A1
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.