SA2955SW
Addition of Hydro Seal Fluid Additive to the landing gear shock struts. Held by Granville Lasseter/Dba Granville'S Aircraft Strut Sealant, which holds 27 approved modifications in all. Last revised August 8, 1980. System: landing gear.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Beechcraft Corporation; Beechcraft Corporation; Beechcraft Corporation; Beechcraft Corporation; Beechcraft Corporation; Beechcraft Corporation; Beechcraft Corporation; Beechcraft Corporation; Beechcraft Corporation; Beechcraft Corporation; Beechcraft Corporation; Beechcraft Corporation; Beechcraft Corporation; Beechcraft Corporation; Beechcraft Corporation; Beechcraft Corporation; Beechcraft Corporation; Beechcraft Corporation
- Models
- 65-80, 65-88, 65-90, 65-A80-8800, 65-A80, 65-A90-1, 65-A90-2, 65-A90-3, 65-A90-4, 65-A90, 65-B80, 65, 70, A65-8200, A65, B90, C90, E90
- Type certificates
- 3A20, 3A20, 3A20, 3A20, 3A20, 3A20, 3A20, 3A20, 3A20, 3A20, 3A20, 3A20, 3A20, 3A20, 3A20, 3A20, 3A20, 3A20
- On this site
- Beechcraft 65 201 registered
Beechcraft A65 7 registered
Beechcraft B90 29 registered
Beechcraft C90 King Air C90 607 registered
Beechcraft E-90 King Air E90 146 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 19, 2026.