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

SA01916AT

Manufacture of Tray Carrier P/N 1839-501. Held by Bfe Services, which holds 37 approved modifications in all. Last revised May 27, 1999. System: other and general.

What it applies to

Kind of product
Aircraft
Design holder
The Boeing Company; The Boeing Company; The Boeing Company; The Boeing Company; The Boeing Company; McDonnell Douglas Corporation
Models
737 Series, 767 Series, 747 Series, 757 Series, 727 Series, MD-11
Type certificates
A16WE, A1NM, A20WE, A2NM, A3WE, A22WE
On this site
Boeing 727 37 registered
Boeing 737 2,887 registered
Boeing 747 192 registered
Boeing 757 440 registered
Boeing 767 583 registered
Mcdonnell Douglas MD-11 104 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.