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

ST04257NY

Demonstrate Electromagnetic Compatibility (EMC) to Transmitting Portable Electronic Devices (T-PED). Held by Aloft Aeroarchitects, which holds 48 approved modifications in all. Last revised November 3, 2023. System: other and general.

What it applies to

Kind of product
Aircraft
Design holder
The Boeing Company; The Boeing Company
Models
767-400ER Series, 767-300 Series
Type certificates
A1NM, A1NM
On this site
Boeing 767 583 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.