# STC SA331NW - Type: Supplemental type certificate - Status: Current, Reissued - Holder: R-S Sales Inc. - Description: Installation of automatic flagman Model No. 4 - Status date: August 27, 2001 - Data sheets: A-743 - Certificate PDF: https://openairdocs.org/files/sha256/23/bf/23bf538fb9f64b2556dc96c2f184926da85b769f171e61d0996c7d025b85f661 - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/5BACF95D2F261F3085256CC2000A96D0.0001 - Page: https://openairdocs.org/stc/SA331NW ## ADs that name it None. ## Approved models (1) - Boeing Airplane Company Wichita Division 75 (Army PT-13) (TCDS A-743) ## 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. Number SA331NW This certificate, issued to R-S Sales, Inc. 170 O’Connor Road Lewiston, ID 83501 Part 4a of the Civil Air Regulations. Original ProductType Certificate Number: A-743 Make: Boeing Model: 75 (Restricted Category) Description of the Type Design Change: Installation of Automatic Flagman Model No. 4, in accordance with North American Industries, Inc., Drawing 105 and 117, and Installation Instructions No. 6-1000. Limitations and Conditions: Approval of this change in type design applies to the above model aircraft only. 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 relationship between this change and any of those other previously approved modifications, including changes in type design, will introduce no adverse effect upon the airworthiness of that aircraft. A copy of this Certificate must be maintained as part of the permanent records for 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. Date of application: October 31, 1975 Date reissued: 07/03/80; 04/02/86; 08/27/01 Date of issuance: October 6, 1976 Date amended: 07/03/80; 08/27/01 (Signature) Acting Manager, Seattle Aircraft Certification Office (Title) ## Every issue (1) - August 27, 2001: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/23/bf/23bf538fb9f64b2556dc96c2f184926da85b769f171e61d0996c7d025b85f661) --- 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.