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

ST03742Ny

Enhanced Terminal Wireless LAN Unit (eTWLU), Antenna & Wiring Relocation and eTWLU De-Mod configuration per Viasat Installation Master Data List: CN17-016MDL-00, revision 7, dated February 26, 2018 or later FAA-approved revision for configurations -101, -103 and -105 as listed on the Master Installation Drawing: MI17-016-00. Held by Aloft Aeroarchitects, which holds 48 approved modifications in all. Last revised March 9, 2018. System: electrical power.

What it applies to

Kind of product
Aircraft
Design holder
Airbus SAS; Airbus SAS; Airbus SAS; Airbus SAS; Airbus SAS; Airbus SAS; Airbus SAS; Airbus SAS
Models
A321-111, A321-112, A321-131, A321-211, A321-212, A321-213, A321-231, A321-232
Type certificates
A28NM, A28NM, A28NM, A28NM, A28NM, A28NM, A28NM, A28NM
On this site
Airbus A321 929 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.