SA931NW
Installation of Hayes Industries tapered axles to accommodate Hayes 27 inch wheel assemblies (PN G31A), Hayes 11 x 2 brake assembly (PN H-12-19), Warner Aircraft brake master cylinders (PN 3150-5) and associated tires and plumbing. Held by Portland City Temple. Last revised April 21, 1980. System: landing gear.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Bellanca Aircraft Corporation
- Models
- CH-300 Pacemaker
- Type certificate
- ATC 129
- 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.