# STC SH560NW - Type: Supplemental type certificate - Status: Current, Reissued - Holder: Siam Hiller Holdings Inc, United States - Description: Installation and maintenance of engine inlet air cleaner system. - Applied: July 11, 1977 - Status date: August 19, 2005 - Product: Aircraft, Rotorcraft - Certification basis: Part 21, Part 27 - Data sheets: [TCDS 4H11](https://openairdocs.org/tcds/4H11) - Certificate PDF: https://openairdocs.org/files/sha256/29/18/2918ccfaf9c121dcaaa86efcc390f3cb83c199d9da51b466f7ed6a64c4dd6439 - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/C327C294A61D2BB2862570E5006D5E22.0001 - DRS record last changed: December 6, 2025 - Page: https://openairdocs.org/stc/SH560NW ## 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. 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 and maintenance of engine inlet air cleaner system in accordance with FAA approved Soloy Conversions, Ltd. Drawing List 560-861 dated January 12, 1978, or later FAA approved revision. 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 interrelationship 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. The limitations and conditions of Rotorcraft Type Certificate 4H11 and STC SH178WE apply except as outlined on page 3 of this STC. 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 11, 1977 Date of issuance: January 18, 1978 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) Number SH560NW Limitations and Conditions: (Continued) The limitations and conditions described in STC SH178WE are applicable to this modification except as detailed below: 1. Rotorcraft Flight Manual FAA approved Soloy Conversions, Ltd. Rotorcraft Flight Manual dated April 10, 1975, with Supplement 8 is required in lieu of that specified for the basic unmodified Model UH-12E. Refer to the applicable portions of the FAA approved Soloy Conversions, Ltd. Rotorcraft Flight Manual for required placards and instrument markings. 2. Maintenance and Preflight Inspections Refer to the applicable portions of Soloy Conversions, Ltd. Maintenance Manual for the required maintenance of this system. Refer to the RFM Supplement for the required preflight inspection and check of this system. - END - ## Every issue (1) - August 19, 2005: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/29/18/2918ccfaf9c121dcaaa86efcc390f3cb83c199d9da51b466f7ed6a64c4dd6439) --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.