SE00057AT
Installation of Aeronautical Accessories, Inc., Pc Safety Valve Kit. Held by Bell Helicopter Textron INC., which holds 366 approved modifications in all. Last revised May 29, 2013. System: engine.
What it applies to
- Kind of product
- Engine
- Design holder
- Rolls-Royce Corporation; Rolls-Royce Corporation; Rolls-Royce Corporation; Rolls-Royce Corporation; Rolls-Royce Corporation; Rolls-Royce Corporation; Rolls-Royce Corporation; Rolls-Royce Corporation; Rolls-Royce Corporation; Rolls-Royce Corporation; Rolls-Royce Corporation
- Models
- 250-C28, 250-C28B, 250-C28C, 250-C30, 250-C30G, 250-C30M, 250-C30P, 250-C30R (T703-AD-700), 250-C30R/1 (T703-AD-700B), 250-C30S, 250-C30U
- Type certificates
- E1GL, E1GL, E1GL, E1GL, E1GL, E1GL, E1GL, E1GL, E1GL, E1GL, E1GL
- 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 21, 2026.