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

SA2404WE

Consolidation of STC s SA355CE and SA362CE into one STC having a Master Eligibility List and amendment of these STC s to include and improved Power Supply Assembly and Subchassis Timer Assembly for the Twilighter MK III high intensity supplementary lighting system in accordance with the applicable FAA sealed drawing listed on the attached sealed Master Eligibility List Number SA2404WE. Held by Bf Goodrich Aerospace, which holds 139 approved modifications in all. Last revised September 30, 2011. System: electrical power.

What it applies to

Kind of product
Aircraft
Design holder
Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Hawker Beechcraft Corporation; Hawker Beechcraft Corporation
Models
310G, 310F, 310, 320, 320A, 320B, 320-1, 402, 421A, 421, 401, 401A, 411, 411A, BH.125 Series 600A, DH.125 Series 400A
Type certificates
3A10, 3A10, 3A10, 3A25, 3A25, 3A25, 3A25, A7CE, A7CE, A7CE, A7CE, A7CE, A7CE, A7CE, A3EU, A3EU
On this site
Cessna 310 1,410 registered
Cessna 320 137 registered
Cessna 401 51 registered
Cessna 402 174 registered
Cessna 411 10 registered
Cessna 421 Golden Eagle 769 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.