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

SA2182WE

Installation of Bendix Third Attitude Indicator to meet the requirements of § 121.305(j) in accordance with FAA Approved United Air Lines Engineering and Maintenance Report F-1450, Appendix "A" or later FAA approved revisions. Held by United Airlines INC, which holds 520 approved modifications in all. Last revised November 30, 2011. System: instruments and avionics.

What it applies to

Kind of product
Aircraft
Design holder
The Boeing Company
Models
737
Type certificate
A16WE
On this site
Boeing 737 2,892 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.