What it approves
Installation of transmission oil cooling system on the Allison250-C20 turbine powered Hiller UH-12E rotorcraft. (UH-12E modified per STC SH178WE)
What the certificate says
From the PDF’s text layer, without the form’s printed wording. Layout and order may differ; the PDF is the record.
United States Of America Department of Transportation - Federal Aviation Administration Supplemental Type Certificate This certificate reissued to replace certificate reported lost
This Certificate issued to Siam Hiller Holdings, Inc.
925 M Street Firebaugh, California 93622 Part 27 of the Federal Aviation Regulations.
4H11 Hiller UH-12E Description of Type Design Change: Installation of a transmission oil cooling system on the Allison 250-C20 Turbine powered Hiller UH-12E rotorcraft in accordance with FAA approved Soloy Conversions, Ltd. Drawing List 560-111 dated August 4, 1976, or later FAA approved revision.
This transmission oil cooler assembly must be visually inspected prior to each flight as part of the normal rotorcraft preflight inspection procedure.
NOTE: Only those Hiller UH-12E rotorcraft which have been converted to turbine power in accordance with STC SH178WE are eligible for this modification.
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 22, 1976
Date of issuance: August 12, 1976
Date reissued: 06/02/83; 10/25/84; 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)
ADs that name this STC · 0
An AD can apply because an STC is installed, or mention one in its text.
Approved models · 1
| Make | Model | Data sheet |
|---|---|---|
| Rogerson Hiller Corporation | UH-12E | 4H11 |