# STC SH506NW

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Siam Hiller Holdings Inc, United States
- Description: Installation of cargo release pedal.
- Applied: July 14, 1977
- Status date: August 19, 2005
- Product: Aircraft, Rotorcraft
- Certification basis: Part 21
- Data sheets: [TCDS 4H11](https://openairdocs.org/tcds/4H11)
- Certificate PDF: https://openairdocs.org/files/sha256/94/56/945687b6e93219fb96a3fb9e8348e0e4aed6c940a3bf286df9eea6036de33291
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/C60D8E7802E2A95B862570C8006C247B.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SH506NW

## ADs that name it (0)

None.

## Approved models (1)

- Rogerson Hiller Corporation UH-12E ([TCDS 4H11](https://openairdocs.org/tcds/4H11))

## 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 SH506NW

This Certificate issued to Siam Hiller Holdings, Inc.

925 M Street Firebaugh, California 93622 Part 6 of the Civil Air Regulations. effective December 20, 1956.

4H11 Hiller UH-12E (3 and 4 place configurations, including rotorcraft modified by STC SH178WE) Description of Type Design Change: Installation of a cargo release pedal in accordance with FAA approved Soloy Conversions, Ltd. Drawing List No. 560-141.

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 this model 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 will introduce no adverse effect upon the airworthiness of that rotorcraft. A copy of this Certificate 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.

This certificate and the supporting data, which is the basis for approval, shall remain in effect until surrendered, suspended, revoked or a termination date is otherwise established by the Administrator of the Federal Aviation Administration.

Date of application: July 14, 1977

Date of issuance: August 23, 1977

Date reissued: 05/28/91; 11/30/95; 08/19/05

Date amended: 05/28/91

( Signature)

Manager, Technical & Administrative Support Staff, Los Angeles Aircraft Certification Office ( Title)

## Every issue (1)

- August 19, 2005: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/94/56/945687b6e93219fb96a3fb9e8348e0e4aed6c940a3bf286df9eea6036de33291)

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