# STC SA235AL - Type: Supplemental type certificate - Status: Current, Reissued - Holder: Airglas Inc., United States - Description: Installation of modified oleo shock strut. - Applied: December 20, 1966 - Status date: August 14, 2012 - Product: Aircraft, Single-Engine - Certification basis: Part 3, Part 21 - Data sheets: [TCDS 1A8](https://openairdocs.org/tcds/1A8) - Certificate PDF: https://openairdocs.org/files/sha256/e5/65/e5658130da16c4f5e04c128d049af4b4ba199f2dad1495f513723872e6e01125 - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/5153F1348298C1F086257EBB00655AB5.0001 - DRS record last changed: December 6, 2025 - Page: https://openairdocs.org/stc/SA235AL ## ADs that name it (0) None. ## Approved models (3) - Helio Aircraft LLC H-391B ([TCDS 1A8](https://openairdocs.org/tcds/1A8)) - Helio Aircraft LLC H-395 (USAF L-28A or U-10B) ([TCDS 1A8](https://openairdocs.org/tcds/1A8)) - Helio Aircraft LLC H-395A ([TCDS 1A8](https://openairdocs.org/tcds/1A8)) ## 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 Part 3 of the Civil Air Regulations. Installation of modified shock oleo strut per Airglas Engineering Co., Inc. drawing AGOM-501. This approval should not be extended to other aircraft 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 previously approved modifications will introduce no adverse effect on the airworthiness of that aircraft. 3500 O’Malley Rd Anchorage, AK 99507 1A8 Make : Helio Model : H391B, H395, and H395A Date reissued : August 14, 2012 (Signature) August A. Asay Manager, Anchorage Aircraft Certification Office (Title) Date of application : December 20, 1966 Date of issuance : April 28, 1967 ## Every issue (1) - August 14, 2012: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/e5/65/e5658130da16c4f5e04c128d049af4b4ba199f2dad1495f513723872e6e01125) --- 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.