SH8331SW
Installation of Kulite P/N APTE-139KBS-1000-1500SG transducer. in place of Kratos P/N 50579 or 50579-3 transmitter. Held by Benz Airborne Systems, which holds 26 approved modifications in all. Last revised February 26, 1992. System: other and general.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Bell Helicopter Textron; Bell Helicopter Textron
- Models
- 412, 212
- Type certificates
- H4SW, H4SW
- On this site
- Bell 212 59 registered
Bell 412 87 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.