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

SB00408LA

Installation of protective caps on basket oak runners. Held by Pacific Southwest Aerostats. Last revised June 20, 1997. 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; Conn Sidney; Conn Sidney; Conn Sidney; Conn Sidney; Conn Sidney; Conn Sidney; Conn Sidney; Conn Sidney
Models
Firefly 8B-15, Firefly 5, Firefly Bottle, Firefly 8B, Firefly 8-24, Firefly 7, Firefly C7B, Firefly 7B-15, Firefly 7-15, Firefly 7B, Firefly 6, Firefly 6B, Firefly 6B-15, Firefly C7, Firefly 8, Firefly B7
Type certificates
A14SO, A14SO, A14SO, A14SO, A14SO, A14SO, A14SO, A14SO, A14SO, A14SO, A14SO, A14SO, A14SO, A14SO, A14SO, A14SO
On this site
Balloon Works FIREFLY 5 5 registered
Balloon Works FIREFLY 6 18 registered
Balloon Works FIREFLY 8 183 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 21, 2026.