SA2957SW
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
- Models
- 50, B50, C50, D50, D50A, D50B, D50C, D50E-5990, D50E, E50, F50, G50, H50, J50
- Type certificates
- 5A4, 5A4, 5A4, 5A4, 5A4, 5A4, 5A4, 5A4, 5A4, 5A4, 5A4, 5A4, 5A4, 5A4
- On this site
- Beechcraft B50 13 registered
Beechcraft C-50 20 registered
Beechcraft D-50 65 registered
Beechcraft E50 11 registered
Beechcraft H50 5 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.