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

SA562GL

Installation of Aero Fabricators8-gallon or 12-gallon wing auxiliary fuel tanks. Held by Aero Fabricators CO, which holds 39 approved modifications in all. Last revised September 24, 1981. System: airframe structure.

What it applies to

Kind of product
Aircraft
Design holder
The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.
Models
J3L-65S, J3L-65 (Army L-4C), J3L-S, J3L
Type certificates
A-698, A-698, A-698, A-698
On this site
Piper J-3 Cub 3,804 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.