# STC SA3166SO - Type: Supplemental type certificate - Status: Current, Reissued - Holder: Acron Aviation Inc. - Description: Installation of an Expanded parameters Digital Flight Data Recorder - Status date: April 1, 2025 - Data sheets: 4A25, 4A25, 4A25, 4A25, 4A25, 4A25, 4A25, 4A25, 4A25, 4A25, 4A25, 4A25 - Certificate PDF: https://openairdocs.org/files/sha256/1d/30/1d3099b6a4e8c5ce513effee268490eb9b41f2dade85432ec1cc51165c43b032 - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID154308907120250804180148.0001 - Page: https://openairdocs.org/stc/SA3166SO ## ADs that name it None. ## Approved models (12) - The Boeing Company DC-8-51 (TCDS 4A25) - The Boeing Company DC-8-52 (TCDS 4A25) - The Boeing Company DC-8-53 (TCDS 4A25) - The Boeing Company DC-8-55 (TCDS 4A25) - The Boeing Company DC-8-61 (TCDS 4A25) - The Boeing Company DC-8-62 (TCDS 4A25) - The Boeing Company DC-8-62F (TCDS 4A25) - The Boeing Company DC-8-63 (TCDS 4A25) - The Boeing Company DC-8-63F (TCDS 4A25) - The Boeing Company DC-8-71 (TCDS 4A25) - The Boeing Company DC-8-72 (TCDS 4A25) - The Boeing Company DC-8-73 (TCDS 4A25) ## 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. SA3166SO Acron Aviation, Inc. 5353 52nd Street South East Grand Rapids, MI 49512-9704 Part 25 the Federal Aviation Regulations 4A25 The Boeing Company DC-8-50, 60, 70 Series Installation of an Expanded parameters Digital Flight Data Recorder in accordance with Flight Systems Engineering Report No. 92-01-01, Revision A, dated 2/24/92, or later FAA approved revisions. This approval should not be extended to other aircraft of this model 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 produce no adverse effect upon the airworthiness of that airplane. 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. December 12, 1991 February 24, 1992 April 29, 1992; December 15, 1992 for Paul Nguyen Manager, Central Certification Branch Compliance & Airworthiness Division Aircraft Certification Service 2 July 8, 2003; December 12, 2022; April 1, 2025 SA3166SO 2 ## Every issue (2) - April 1, 2025: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/1d/30/1d3099b6a4e8c5ce513effee268490eb9b41f2dade85432ec1cc51165c43b032) - December 12, 2022: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/e0/58/e058bdeeaee82870fb0500a1fbf026021db7cb1bedd1755a89dc8c7135aa5308) --- From OpenAirDocs.org, an independent open copy of FAA data. Only the Federal Register edition on govinfo.gov is the official legal text of an AD.