# STC SA3678WE - Type: Supplemental type certificate - Status: Current, Reissued - Holder: Airwolf Filter Corporation, United States - Description: Installation of air/oil separator. - Applied: February 7, 1978 - Status date: December 20, 2017 - Product: Aircraft, Single-Engine - Certification basis: Part 21 - Data sheets: [TCDS A-777](https://openairdocs.org/tcds/A-777) - Certificate PDF: https://openairdocs.org/files/sha256/b2/78/b2789c3322a58ba6f8ab1987acacacd2a90624cd64679e226d00db3a3ce685d4 - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/96F7D25625FC78FC8625821800555938.0001 - DRS record last changed: December 6, 2025 - Page: https://openairdocs.org/stc/SA3678WE ## ADs that name it (0) None. ## Approved models (9) - Raytheon Aircraft Company 35 ([TCDS A-777](https://openairdocs.org/tcds/A-777)) - Raytheon Aircraft Company 35R ([TCDS A-777](https://openairdocs.org/tcds/A-777)) - Raytheon Aircraft Company A35 ([TCDS A-777](https://openairdocs.org/tcds/A-777)) - Raytheon Aircraft Company B35 ([TCDS A-777](https://openairdocs.org/tcds/A-777)) - Raytheon Aircraft Company C35 ([TCDS A-777](https://openairdocs.org/tcds/A-777)) - Raytheon Aircraft Company D35 ([TCDS A-777](https://openairdocs.org/tcds/A-777)) - Raytheon Aircraft Company E35 ([TCDS A-777](https://openairdocs.org/tcds/A-777)) - Raytheon Aircraft Company F35 ([TCDS A-777](https://openairdocs.org/tcds/A-777)) - Raytheon Aircraft Company G35 ([TCDS A-777](https://openairdocs.org/tcds/A-777)) ## 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. 3* Civil Air *Certification basis is set forth on Type Certificate Data Sheet A-777, Revision 54. Installation of an air/oil separator in accordance with FAA-sealed Walker Engineering Company Master Drawing List No. DLW-3000-3, Revision “B”, or later FAA-approved revisions. The approval of this change in type design applies basically to the above listed models only. This approval should not be extended to other specific airplanes of these models on which other previously approved modifications are incorporated unless it is determined by the installer that the interrelationship between this change and any of those other previously approved modifications will introduce no adverse effect upon the airworthiness of the above listed airplanes. A copy of this STC must be included in the permanent records of the modified aircraft. 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. Airwolf Filter, Corp. 12801 Hwy 75 North Okmulgee, OK 74447 A-777 Beech 35, A35, B35, C35, D35, E35, F35, G35 and 35R February 7, 1978 July 19, 1978 September 28, 2001; December 20, 2017 (Signature) Roy E. Boffo Manager, Propulsion and Project Management Section Chicago ACO Branch (Title) Original signed by: Roy E. Boffo ## Every issue (1) - December 20, 2017: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/b2/78/b2789c3322a58ba6f8ab1987acacacd2a90624cd64679e226d00db3a3ce685d4) --- 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.