ST08991SC
Installation of a water basin overflow prevention timer-switch. Held by Textron Aviation INC, which holds 723 approved modifications in all. Last revised April 19, 2017. System: electrical power.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Beechcraft Corporation; Beechcraft Corporation; Beechcraft Corporation
- Models
- BAe.125 Series 800A (C-29A), BAe.125 Series 800A (U-125), BAe.125 Series 800A
- Type certificates
- A3EU, A3EU, A3EU
- On this site
- British Aerospace BAE 125 76 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.