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

SA09503SC

Conversion of the factory installed R-12 Air conditioning system to R134A refrigerant. Held by Steinbach & Associates, INC., which holds 11 approved modifications in all. Last revised September 22, 1998. System: heating, ice protection and utility systems.

What it applies to

Kind of product
Aircraft
Design holder
Beechcraft Corporation; Beechcraft Corporation; Beechcraft Corporation; Beechcraft Corporation; Beechcraft Corporation; Beechcraft Corporation; Beechcraft Corporation; Beechcraft Corporation
Models
58, 58A, 58P, 58PA, 58TC, 58TCA, E55, E55A
Type certificates
3A16, 3A16, A23CE, A23CE, A23CE, A23CE, 3A16, 3A16
On this site
Beechcraft 58 Baron 1,295 registered
Beechcraft E-55 215 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.