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

SR03281CH

Installation of Garmin G500H Flight Display System, including GDU 620 PFD/MFD, GTN 650 Control and Display, GRS 77H AHRS, GMU 44 Magnetometer, GTP 59 Temperature Probe and Midcontinent Instrument MD302 Standby Attitude Module. Held by University Aerospace Foundation. Last revised November 21, 2013. System: instruments and avionics.

What it applies to

Kind of product
Aircraft
Design holder
Sikorsky Aircraft Corporation
Models
269C
Type certificate
4H12
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.