# STC SA2955SW

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Granville Lasseter/dba Granville's Aircraft Strut Sealant, United States
- Description: Addition of Hydro Seal Fluid Additive to the landing gear shock struts.
- Applied: January 16, 1979
- Status date: August 8, 1980
- Product: Aircraft, Small Airplane
- Certification basis: Part 21
- Data sheets: [TCDS 3A20](https://openairdocs.org/tcds/3A20)
- Certificate PDF: https://openairdocs.org/files/sha256/52/01/52014614dc64e3e24a422cbf8767582e9e4dec8ea813de03bf995cb59fcf2983
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/77FE40A0977987DC85256CC20008CB27.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA2955SW

## ADs that name it (0)

None.

## Approved models (18)

- Beechcraft Corporation 65 ([TCDS 3A20](https://openairdocs.org/tcds/3A20))
- Beechcraft Corporation 65-80 ([TCDS 3A20](https://openairdocs.org/tcds/3A20))
- Beechcraft Corporation 65-88 ([TCDS 3A20](https://openairdocs.org/tcds/3A20))
- Beechcraft Corporation 65-90 ([TCDS 3A20](https://openairdocs.org/tcds/3A20))
- Beechcraft Corporation 65-A80 ([TCDS 3A20](https://openairdocs.org/tcds/3A20))
- Beechcraft Corporation 65-A80-8800 ([TCDS 3A20](https://openairdocs.org/tcds/3A20))
- Beechcraft Corporation 65-A90 ([TCDS 3A20](https://openairdocs.org/tcds/3A20))
- Beechcraft Corporation 65-A90-1 ([TCDS 3A20](https://openairdocs.org/tcds/3A20))
- Beechcraft Corporation 65-A90-2 ([TCDS 3A20](https://openairdocs.org/tcds/3A20))
- Beechcraft Corporation 65-A90-3 ([TCDS 3A20](https://openairdocs.org/tcds/3A20))
- Beechcraft Corporation 65-A90-4 ([TCDS 3A20](https://openairdocs.org/tcds/3A20))
- Beechcraft Corporation 65-B80 ([TCDS 3A20](https://openairdocs.org/tcds/3A20))
- Beechcraft Corporation 70 ([TCDS 3A20](https://openairdocs.org/tcds/3A20))
- Beechcraft Corporation A65 ([TCDS 3A20](https://openairdocs.org/tcds/3A20))
- Beechcraft Corporation A65-8200 ([TCDS 3A20](https://openairdocs.org/tcds/3A20))
- Beechcraft Corporation B90 ([TCDS 3A20](https://openairdocs.org/tcds/3A20))
- Beechcraft Corporation C90 ([TCDS 3A20](https://openairdocs.org/tcds/3A20))
- Beechcraft Corporation E90 ([TCDS 3A20](https://openairdocs.org/tcds/3A20))

## What the certificate says

This is OCR from the scanned FAA certificate. OCR can misread letters and numbers.

Duplicate copy issued on July 23, 2002 United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate Number 5A295554 This certificate issued to: Granville Lasseter d/b/a Granville's Aircraft Strut Sealant 802 E. Grant Morton, Texas 79346 Part 3 of the CIVIL AIT Regulations.

Original Product - Type bertificate Number: 3A20 Make: Beech 65, A65, 65-80, A65-8200, 65-A80, 65-80-8800, 70, 65-B80, 65-88, 65-90, 65-A90, 65-A90-1, 65-A90-2, 65-A90-3, 65-490-4, B90, C90, Description of Type Design Change: Addition of Hydro Seal Fluid Additive to the landing gear shock struts according to Specifications dated 12/26/76, or later FAA Approved revision.

Cost bebilter in this modification with other previously approved modifications be determined by the installer.

Sheploy (Signature) TCMINISTRANIO Chief, Engineering and Manufacturing Branch Don P. Watson (Title)

47.

TRANSFER ENDORSEMENT Transfer the ownership of Supplemental Type Certificate Number to (Name of transferee) (Address of transferee) (Number and street) (City, State, and ZIP code) from (Name of grantor) (Print or type) (Address of grantor) (Number & street) (City, State, and ZIP code) Extent of Authority (if licensing agreement):

Signature of grantor (In ink):

## Every issue (1)

- August 8, 1980: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/52/01/52014614dc64e3e24a422cbf8767582e9e4dec8ea813de03bf995cb59fcf2983)

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