# STC SH5122NM

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Hillsboro Aviation Inc, United States
- Description: Installation of Howell H2900K-436 Exhaust Gas Temperature Indicator
- Applied: March 2, 1990
- Status date: June 7, 2016
- Product: Aircraft, Rotorcraft
- Certification basis: Part 21
- Data sheets: [TCDS H1SW](https://openairdocs.org/tcds/H1SW)
- Certificate PDF: https://openairdocs.org/files/sha256/47/65/47655d751316d6bbb1dad277452dc31fa634f818ac2c110f36ec49871be62c42
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/6850C302CCB9D7EE86257FCB0075991F.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SH5122NM

## ADs that name it (0)

None.

## Approved models (3)

- Bell Helicopter Textron Inc. 204B ([TCDS H1SW](https://openairdocs.org/tcds/H1SW))
- Bell Helicopter Textron Inc. 205A-1 ([TCDS H1SW](https://openairdocs.org/tcds/H1SW))
- Bell Helicopter Textron Inc. 205B ([TCDS H1SW](https://openairdocs.org/tcds/H1SW))

## 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.

Number SH5122NM

This certificate, issued to Hillsboro Aviation, Inc.

3845 NE 30th Avenue Hillsboro, OR 97124

Part 7 of the Civil Air Regulations.

Original ProductType Certificate Number: H1SW Make: Bell Model: 204B, 205A-1, 205B

Description of the Type Design Change: Installation of Howell H2900K-436 Exhaust Gas Temperature Indicator in accordance with Heli-Conversions, Inc. Installation Instructions ANM-100S-1435, Revision 1, dated February 25, 1991, or later Federal Aviation Administration (FAA) approved revision.

Limitations and Conditions: Approval of this change in type design applies to the above model rotorcraft only.

This approval should not be extended to other rotorcraft of these models on which other previously approved modifications are incorporated unless it is determined that the relationship between this change and any of those other previously approved modifications, including changes in type design, will introduce no adverse effect upon the airworthiness of that rotorcraft. A copy of this certificate and Rotorcraft Flight Manual Supplement, dated March 18, 1991, or Rotorcraft Flight Manual Supplement, dated May 12, 1998, (for the T5317B engine installed in the Model 205A-1 helicopter) or later FAA-approved revisions, must be maintained as part of the permanent records for the modified rotorcraft.

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.

Date of application: March 2, 1990 Date reissued: April 12, 2013; June 7, 2016 Date of issuance: March 18, 1991 Date amended: May 12, 1998

FAA FORM 8110-2-1 (10-69) PAGE 1 OF 2 PAGES By direction of the Administrator

(Signature)

Manager, Seattle Aircraft Certification Office (Title)

## Every issue (3)

- June 7, 2016: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/47/65/47655d751316d6bbb1dad277452dc31fa634f818ac2c110f36ec49871be62c42)
- April 12, 2013: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/db/a4/dba46c5824acb59284eba77e8c7035e5847c5a36545207ed47ab432bfd1afc34)
- May 12, 1998: Amended, Historical. [certificate](https://openairdocs.org/files/sha256/c4/14/c4144da17cca67dced02a40657c5d17ceb1a4ec2da5ce52d5f767e1e3e85ae2a)

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