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

SA345SW

Installation of Bendix Doppler radar navigation system. Held by Associated Air Center, INC. - C/O Ct Corporation System, which holds 226 approved modifications in all. Last revised January 19, 2018. System: instruments and avionics.

What it applies to

Kind of product
Aircraft
Design holder
Lockheed Martin Corporation; Lockheed Martin Corporation; Lockheed Martin Corporation; Lockheed Martin Corporation
Models
1329-23A, 1329-23D, 1329-23E, 1329-25
Type certificates
2A15, 2A15, 2A15, 2A15
On this site
Lockheed 1329 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 7, 2026.