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

SA1025SO

Installation of a Bendix NP-2041A area navigation computer programmer. Held by Bendix Corporation Avionics Div, which holds 102 approved modifications in all. Last revised October 4, 1978. System: instruments and avionics.

What it applies to

Kind of product
Aircraft
Design holder
The Cessna Aircraft Company
Models
340A
Type certificate
3A25
On this site
Cessna 340 707 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 8, 2026.