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

SB1679GL

Replace suspension cables with Finn-Bilt Ltd. suspension cableKit No. 119 (Firefly 5, 6B, 7B), Kit No. 219 (Firefly 6, 7B, 8B), Kit No. 319 (Firefly 8), or Kit No. 419 (Firefly 9). Held by Viitala William Thomas. Last revised December 12, 1991. System: other and general.

What it applies to

Kind of product
Aircraft
Design holder
Conn Sidney; Conn Sidney; Conn Sidney; Conn Sidney; Conn Sidney; Conn Sidney; Conn Sidney; Conn Sidney
Models
Firefly 7, Firefly 6, Firefly 8B, Firefly 9, Firefly 8, Firefly 7B, Firefly 6B, Firefly 5
Type certificates
A14SO, A14SO, A14SO, A14SO, A14SO, A14SO, A14SO, A14SO
On this site
Balloon Works FIREFLY 5 5 registered
Balloon Works FIREFLY 6 18 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.