SA92EA
Install wheels P/N's 3-1112 and/or311-58 and P/N's 2-878 and/or2-971 and/or 2-1087. Held by Bf Goodrich Aerospace, which holds 139 approved modifications in all. Last revised September 4, 1974. System: landing gear.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Twin Commander Aircraft Corporation; Twin Commander Aircraft Corporation; Twin Commander Aircraft Corporation; Twin Commander Aircraft Corporation; Twin Commander Aircraft Corporation; Twin Commander Aircraft Corporation; Twin Commander Aircraft Corporation; Twin Commander Aircraft Corporation; Twin Commander Aircraft Corporation; Twin Commander Aircraft Corporation; Twin Commander Aircraft Corporation
- Models
- 720, 680T, 680, 680FL(P), 680-F, 680FL, 560-E, 560-A, 500, 500-B, 500-A
- Type certificates
- 2A4, 2A4, 2A4, 2A4, 2A4, 2A4, 6A1, 6A1, 6A1, 6A1, 6A1
- On this site
- Aero Commander 680 51 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 21, 2026.