SH3731SW
Installation of 155 gallon capacity external auxiliary fuel system in accordance with drawing list 41228-1000, Revision B, dated February 21, 1987, or later FAA approved revision. Held by Apical Industries INC, which holds 39 approved modifications in all. Last revised December 29, 2006. System: fuel system.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Bell Helicopter Textron
- Models
- 412
- Type certificate
- 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 7, 2026.