# STC SH4997SW

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Craig Helicopters, United States
- Description: Installation of Lycoming TIVO-540-A2A engine
- Applied: June 12, 1982
- Status date: February 16, 1984
- Product: Aircraft, Rotorcraft
- Data sheets: [TCDS 4H11](https://openairdocs.org/tcds/4H11)
- Certificate PDF: https://openairdocs.org/files/sha256/03/34/0334acec4c80ebfc65d741c33a0e5875e091594b01026fe1d4b3afc4e4116f09
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID122367318120241022180223.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SH4997SW

## ADs that name it (0)

None.

## Approved models (1)

- Siam Hiller Holdings Inc. UH-12E ([TCDS 4H11](https://openairdocs.org/tcds/4H11))

## What the certificate says

The certificate is a scan without a text layer; open the PDF to read it.

## Every issue (3)

- February 16, 1984: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/03/34/0334acec4c80ebfc65d741c33a0e5875e091594b01026fe1d4b3afc4e4116f09)
- June 28, 1983: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/e5/14/e514e8889aa5baa69333bfcc95e26378044f721593155c4218a6a65406562749)
- April 27, 1983: Issued, Historical. [certificate](https://openairdocs.org/files/sha256/29/bc/29bc6a01250ae06494758e7267961747e71a0ba9fe89f435ce8874680f4b5ad5)

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