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

SA8604SW-D

Increase maximum takeoff weight to 6390 pounds and maximum landing weight to 6075 pounds. Held by Ram Aircraft Limited Partnership, which holds 174 approved modifications in all. Last revised September 4, 2008. System: other and general.

What it applies to

Kind of product
Aircraft
Design holder
Cessna Aircraft Company; Cessna Aircraft Company
Models
340, 340A
Type certificates
3A25, 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 7, 2026.