SR09535RC-D
Installation of a Dual Tailboom Strakes and FastFin System. Held by Blr Aerospace LLC., which holds 33 approved modifications in all. Last revised August 23, 2018. System: other and general.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Agusta S.p.A.; Agusta S.p.A.; Bell Helicopter Textron Inc.; Bell Helicopter Textron Inc.; Bell Helicopter Textron Inc.
- Models
- AB412, AB412 EP, 412, 412CF, 412EP
- Type certificates
- H79EU, H79EU, H4SW, H4SW, H4SW
- On this site
- 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 22, 2026.