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

ST00255WI-D

Conversion of a Passenger Airplane to a Main Deck Side Cargo Door Dedicated Special Freighter without a Boeing main deck cargo handling system. Held by Boeing Commercial Airplane Group, which holds 41 approved modifications in all. Last revised May 10, 2001. System: cabin, seats and restraints.

What it applies to

Kind of product
Aircraft
Design holder
The Boeing Company
Models
747-200B Series
Type certificate
A20WE
On this site
Boeing 747 192 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.