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

SA34CE

Tow hitch assembly. Held by Soaring Society of American INC.. Last revised January 1, 1960. System: other and general.

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
Models
305B (Military T0-1D; 0-1D; 0-1F), 305C (USAF 0-1E), 305A (USAF 0-1A), 140, 120, 170
Type certificates
3A14, 5A5, 5A5, A-768, A-768, A-799
On this site
Cessna/Air Repair Inc 305 8 registered
Cessna 120 660 registered
Cessna 140 1,839 registered
Cessna 170 2,085 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.