# STC SH1451GL

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Shadin Avionics, United States
- Description: Installation of a Shadin engine trend monitoring system.
- Applied: June 2, 1989
- Status date: June 8, 2006
- Product: Aircraft, Rotorcraft
- Certification basis: Part 21
- Data sheets: [TCDS H2SW](https://openairdocs.org/tcds/H2SW)
- Certificate PDF: https://openairdocs.org/files/sha256/bb/65/bb657b9dca71f8e384e821271ead637dc9b7ae6eac3b2233568bfd665f5bc423
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/E57DA4873168CE45862575E500527BB6.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SH1451GL

## ADs that name it (0)

None.

## Approved models (5)

- Bell Helicopter Textron (Canada) 206B ([TCDS H2SW](https://openairdocs.org/tcds/H2SW))
- Bell Helicopter Textron (Canada) 206L ([TCDS H2SW](https://openairdocs.org/tcds/H2SW))
- Bell Helicopter Textron (Canada) 206L-1 ([TCDS H2SW](https://openairdocs.org/tcds/H2SW))
- Bell Helicopter Textron (Canada) 206L-3 ([TCDS H2SW](https://openairdocs.org/tcds/H2SW))
- Bell Helicopter Textron (Canada) 206L-4 ([TCDS H2SW](https://openairdocs.org/tcds/H2SW))

## What the certificate says

Read from the PDF's text layer, without the form's printed wording; the layout is lost and the order can differ. The PDF is the record.

Part 6 of the Civil Air Regulations.

(See Type Certificate Data Sheet H2SW for complete certification basis.)

Installation of a Shadin Company Engine Trend Monitoring System in accordance with Shadin Company report number 3205, dated June 2, 1994 or other FAA approved revisions.

1) This approvalshould not be extended to other helicopters of this model on which other previously approved modifications are incorporated unless it is determined that the interrelationship between this change and any of those other previously approved modifications will introduce no adverse effect upon the airworthiness of that helicopter.

2) Rotorcraft Flight Manual Supplement, FAA Approved on July 1, 1994, or later FAA Approved revision is a required part of this STC.

3) If the holder agrees to permit another person to use this certificate to alter the product, the holder shall give the other person written evidence of that permission.

Shadin Avionics 6831 Oxford Street St. Louis Park, MN 55426 H2SW Make : Bell Helicopter Textron Model : 206B, 206L, 206L-1, 206L-3, 206L-4 Date of application : June 2, 1989

Date of issuance : February 21, 1990

Date reissued : August 22, 1994, June 8, 2006

Date amended : September 10, 1990, July 1, 1994

( Signature) Charles L. Smalley Manager, Systems and Flight Test Branch Chicago Aircraft Certification Office

( Title)

## Every issue (1)

- June 8, 2006: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/bb/65/bb657b9dca71f8e384e821271ead637dc9b7ae6eac3b2233568bfd665f5bc423)

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