SA2318NM
Fabrication of North River Aviation model 8400 brake booster assemblies, and modification of Scott Aviation model B-711 brake master cylinders by installation of said assemblies. Held by Northern Piper Aviation INC., which holds 6 approved modifications in all. Last revised January 26, 2006. System: landing gear.
What it applies to
- Kind of product
- Aircraft
- Design holder
- The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.
- Models
- PA-18, PA-18-125 (Army L-21A), PA-18-135, PA-18-150, PA-18A, PA-18A-135, PA-18A-150, PA-19 (Army L-18C)
- Type certificates
- 1A2, 1A2, 1A2, 1A2, 1A2, 1A2, 1A2, 1A2
- On this site
- Piper/Cub Crafters PA-18 46 registered
Piper PA-18 Super Cub 3,620 registered
Piper PA-19 15 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 20, 2026.