# STC SEW-5

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: National Aircraft Sales, Inc, United States
- Description: Ni-resist valve guide LGL 4700.
- Status date: January 1, 1960
- Product: Engine
- Certification basis: Part 21
- Data sheets: TCDS 5E-4, [TCDS E-186](https://openairdocs.org/tcds/E-186)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/C13171540FF0066F862570D20066072E.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SEW-5

## ADs that name it (0)

None.

## Approved models (2)

- Pratt & Whitney Division R-1830 Series (TCDS 5E-4)
- Pratt & Whitney Division Twin Wasp Series ([TCDS E-186](https://openairdocs.org/tcds/E-186))

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