# STC SA4-401

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Gail Aircraft Engineering Co, United States
- Description: Tail wheel trunnion. (Restricted category only.)
- Status date: January 1, 1960
- Product: Aircraft, Single-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A-743](https://openairdocs.org/tcds/A-743)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/96CF7C1F9B571285862570D00054DA42.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA4-401

## ADs that name it (0)

None.

## Approved models (1)

- Boeing Airplane Company Wichita Division 75 Series ([TCDS A-743](https://openairdocs.org/tcds/A-743))

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