SA5117SW-D
Installation of S-TEC yaw damper system model ST-133. Held by S-Tec Corporation, which holds 1,083 approved modifications in all. Last revised November 8, 1995. System: flight controls.
What it applies to
- Kind of product
- Aircraft
- Design holder
- B-N Group Ltd.; B-N Group Ltd.; B-N Group Ltd.; B-N Group Ltd.; B-N Group Ltd.; B-N Group Ltd.; B-N Group Ltd.; B-N Group Ltd.
- Models
- BN-2A-2, BN-2A-20, BN-2A-26, BN-2A-6, BN-2A-8, BN-2B-20, BN-2B-26, BN-2T
- Type certificates
- A17EU, A17EU, A17EU, A17EU, A17EU, A17EU, A17EU, A17EU
- On this site
- Britten-Norman BN-2 54 registered
Pilatus Britten-Norman Ltd. BN-2 13 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 22, 2026.