SL1748SO
Installation of Balloon Works sizes3.9, 4.0, 4.5, 4.9, and 5.0 baskets. Held by Head Balloons INC, which holds 6 approved modifications in all. Last revised March 16, 1990. System: other and general.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Head Balloons Inc.; Head Balloons Inc.; Head Balloons Inc.; Head Balloons Inc.
- Models
- AX8-88, AX7-77, AX9-118, AX8-105
- Type certificates
- A29SO, A29SO, A29SO, A29SO
- On this site
- Head Balloons Inc AX7 56 registered
Head Balloons Inc AX8 116 registered
Head Balloons Inc AX9 25 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.