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

ST01317LA

Interior Modification of Seat Layout and Installation (for Aircraft Serial Numbers: 27615, 29227, 29228, and 29229). Held by US Technical, which holds 7 approved modifications in all. Last revised October 1, 2001. System: cabin, seats and restraints.

What it applies to

Kind of product
Aircraft
Design holder
The Boeing Company
Models
767-300 Series
Type certificate
A1NM
On this site
Boeing 767 583 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 12, 2026.