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

ST01363AT

Increase in aircraft operating weights (max landing weight - 250,000 lbs., max takeoff weight - 342,000 lbs., Max zero fuel wieth - 230,000 lbs.) (DC-8-62 s/n 45925 only). Held by Aircraft Modification Design Services, which holds 10 approved modifications in all. Last revised December 1, 2009. System: other and general.

What it applies to

Kind of product
Aircraft
Design holder
McDonnell Douglas Corporation
Models
DC-8-62
Type certificate
4A25
On this site
Douglas DC-8 6 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.