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

ST01423LA

Use of High Velocity OXYFUEL (HVOF) Thermal Coating as specified in Southwest Aeroservice Master Data List SWA 32-300M or latest FAA approved revision in lieu of chrome plating for various top assembly landing gear parts. Held by Southwest United Industries INC.. Last revised January 24, 2003. System: landing gear.

What it applies to

Kind of product
Aircraft
Design holder
McDonnell Douglas Corporation; McDonnell Douglas Corporation; McDonnell Douglas Corporation
Models
MD-11, MD-88, MD-90-30
Type certificates
A22WE, A6WE, A6WE
On this site
Mcdonnell Douglas Aircraft Co MD-88 10 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 20, 2026.