ST01251NY
ONE ONLY STC, SN 234: ACM Heat Exchanger Modification and Ram Air Vent Assembly Modification.(Serial NO. 234). Held by Cascade Aerospace INC. (Canada), which holds 27 approved modifications in all. Last revised March 3, 2009. System: other and general.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Bombardier Inc.
- Models
- DHC-8-300 Series
- Type certificate
- A13NM
- On this site
- Bombardier DHC-8 Dash 8 and Q400 58 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.