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

SA5671NM

Installation of a wheelchair stowage unit. Held by Steel Products INC. Last revised January 22, 1993. System: other and general.

What it applies to

Kind of product
Aircraft
Design holder
Airbus; Airbus; Airbus; Airbus; Airbus; Airbus; Airbus; Airbus; Airbus; Airbus; Airbus; Airbus; Airbus; Airbus; Airbus; Airbus; Airbus; Airbus; Airbus; Airbus; Airbus; Airbus; Airbus; Airbus; The Boeing Company; The Boeing Company; The Boeing Company; The Boeing Company; The Boeing Company; The Boeing Company; The Boeing Company; The Boeing Company; The Boeing Company; The Boeing Company; The Boeing Company; The Boeing Company; The Boeing Company; The Boeing Company; The Boeing Company; The Boeing Company; The Boeing Company; The Boeing Company; The Boeing Company; The Boeing Company; The Boeing Company; The Boeing Company; The Boeing Company; The Boeing Company; The Boeing Company; The Boeing Company; The Boeing Company; The Boeing Company; The Boeing Company; The Boeing Company; The Boeing Company; The Boeing Company; The Boeing Company; The Boeing Company; The Boeing Company; The Boeing Company; The Boeing Company; The Boeing Company; The Boeing Company; The Boeing Company; Lockheed Martin Corporation; Lockheed Martin Corporation; Lockheed Martin Corporation; Lockheed Martin Corporation
Models
A300 B2-1A, A300 B2-1C, A300 B2-203, A300 B2K-3C, A300 B4-103, A300 B4-203, A300 B4-2C, A300 B4-601, A300 B4-603, A300 B4-605R, A300 B4-620, A300 B4-622, A300 B4-622R, A300 C4-605R Variant F, A300 F4-605R, A300 F4-622R, A310-203, A310-204, A310-221, A310-222, A310-304, A310-322, A310-324, A310-325, 727-100 Series, 727-100C Series, 727-200 Series, 727-200F Series, 727 Series, 727C Series, 737-100 Series, 737-200 Series, 737-200C Series, 737-300 Series, 737-400 Series, 737-500 Series, 737-600 Series, 737-700 Series, 737-700C Series, 737-800 Series, 737-900 Series, 737-900ER Series, 747-100...
Type certificates
A35EU, A35EU, A35EU, A35EU, A35EU, A35EU, A35EU, A35EU, A35EU, A35EU, A35EU, A35EU, A35EU, A35EU, A35EU, A35EU, A35EU, A35EU, A35EU, A35EU, A35EU, A35EU, A35EU, A35EU, A3WE, A3WE, A3WE, A3WE, A3WE, A3WE, A16WE, A16WE, A16WE, A16WE, A16WE, A16WE, A16WE, A16WE, A16WE, A16WE, A16WE, A16WE, A20WE, A20WE, A20WE, A20WE, A20WE, A20WE, A20WE, A20WE, A20WE, A20WE, A20WE, A20WE, A20WE, A20WE, A2NM, A2NM, A2NM, A2NM, A1NM, A1NM, A1NM, A1NM, A23WE, A23WE, A23WE, A23WE
On this site
Airbus A300 120 registered
Boeing 727 37 registered
Boeing 737 2,893 registered
Boeing 747 192 registered
Boeing 757 440 registered
Boeing 767 584 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 21, 2026.