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

SA1979SW

Installation of in-line fuel pumps for auxiliary tanks. Held by Riley Aircraft CORP, which holds 31 approved modifications in all. Last revised November 29, 1984. System: other and general.

What it applies to

Kind of product
Aircraft
Design holder
The Cessna Aircraft Company
Models
340 Series
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 20, 2026.