# STC SH959NW

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Clover Park Vocational/Technical Institute, United States
- Description: Remobe battery from Sta 126 and install it on the original radio rack at Sta 25
- Applied: April 18, 1980
- Status date: June 19, 1980
- Product: Aircraft, Rotorcraft
- Certification basis: Part 21
- Data sheets: [TCDS 6H2](https://openairdocs.org/tcds/6H2)
- Certificate PDF: https://openairdocs.org/files/sha256/bc/62/bc6292dfb95fcba99341904ed6328f1bd42601db61781c3a05449d871a981bf5
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/6CB4C9924815235586257A3F00594A35.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SH959NW

## ADs that name it (0)

None.

## Approved models (1)

- Hiller Aviation UH-12C ([TCDS 6H2](https://openairdocs.org/tcds/6H2))

## What the certificate says

This is OCR from the scanned FAA certificate. OCR can misread letters and numbers.

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate Number: SH959NN This certificate issued to: Clover Park Vocational/Technical School Part 6 of the Civil Air Regulations.

Original Product -Type Certificate Number: 6H2 Make: Hiller Model: UH-12C Description of Type Design Change: Remove battery from Sta. 126 and install it on the original radio rack at Sta. 25 in accordance with photographs 1 through 6.

Limitations and Conditions: Data pertaining to this modification are considered inadequate for duplication in other helicopters. This approval is limited to the installation in Hiller UH-12C, Serial Number 834 only. A copy of this Certificate and FAA Approved Rotorcraft Flight Manual Supplement shall be maintained as part of the permanent records for the modified helicopter..

Date of Application: Apri1 18, 1980 Date Reissued:

Date of Issuance: June 19, 1980 Date Amended:

FEDERAL AVIATION Sy directio f the Administrator.

TO MINISTRATO Chief, Engineering and Manufacturing Branch (Title)

47.

## Every issue (1)

- June 19, 1980: Issued, Current. [certificate](https://openairdocs.org/files/sha256/bc/62/bc6292dfb95fcba99341904ed6328f1bd42601db61781c3a05449d871a981bf5)

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