SA00997CH
Installation of Gross Weight Increase Kit No. 10B1-6521, in accordance with Wipaire Inc. Installation Drawing No. 10B1-6521, no revision, dated December 17, 1998, or later FAA approved revisions. Held by Wipaire INC, which holds 64 approved modifications in all. Last revised March 1, 2011. System: other and general.
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.
- Models
- PA-18A-"150", PA-18-"150", PA-18AS-"150", PA-18S-"150"
- Type certificates
- 1A2, 1A2, 1A2, 1A2
- On this site
- Piper/Cub Crafters PA-18 46 registered
Piper PA-18 Super Cub 3,621 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 5, 2026.