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

SA561WE

12.7-gallon auxiliary fuel tank. Held by Robertson Lorene e. Last revised June 20, 2003. System: fuel system.

What it applies to

Kind of product
Aircraft
Design holder
The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company
Models
182, 182A, 182B, 182C, 182D, 182E, 182F, 180, 180A, 180B, 180C, 180D, 180E, 180F
Type certificates
3A13, 3A13, 3A13, 3A13, 3A13, 3A13, 3A13, 5A6, 5A6, 5A6, 5A6, 5A6, 5A6, 5A6
On this site
Cessna 180 Skywagon 2,605 registered
Cessna 182 Skylane 11,831 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.