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

SH1415NM

Installation of a Perkins Plastics part no 3180-20 bubble window in the right hand door. Held by Wsh, LLC, which holds 7 approved modifications in all. Last revised October 21, 2022. System: airframe structure.

What it applies to

Kind of product
Aircraft
Design holder
Airbus Helicopters
Models
SA.315B Alouette III
Type certificate
H1IN
On this site
Aerospatiale SA315 22 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.