# STC SA1263NW - Type: Supplemental type certificate - Status: Current, Reissued - Holder: AAR Oklahoma Inc, United States - Description: Installation of Olin Industries cloud seeding equipment - Applied: June 19, 1981 - Status date: July 22, 1988 - Product: Aircraft, Small Airplane - Certification basis: Part 21 - Data sheets: [TCDS 3A25](https://openairdocs.org/tcds/3A25) - Certificate PDF: https://openairdocs.org/files/sha256/62/ad/62adafd2f1befe45aa7e1aaefe0f9ab8e45de2c0390c2de326612c137703e4a2 - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/45AC61637FAF028586257A47005A72CC.0001 - DRS record last changed: December 5, 2025 - Page: https://openairdocs.org/stc/SA1263NW ## ADs that name it (0) None. ## Approved models (1) - Cessna Aircraft Company 340A ([TCDS 3A25](https://openairdocs.org/tcds/3A25)) ## What the certificate says This is OCR from the scanned FAA certificate. OCR can misread letters and numbers. United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate Number SA1253NW This certificate issued to: AAR Oklahoma, Inc. Part 3 ef the Civil Air Regulations. 1 effective May 15, 1956, as amended by 3-1 through 3-8. Original Product - Type bertificate Number: 3A25 Make: Cessna Model: 340A Description of Type Design Change: . Installation of Olin Industries cloud seeding equipment in accordance with AAR Western Skyways, Inc. Installation Instructions NS-601-19-81 and photographs 1 through 4. NOTE: This installation reduces the Vne (never exceed speed) to 200 KIAS from 234 KIAS during Restricted Category Operations. Limitations and Conditions: Data pertaining to this modification are considered inadequate for duplication in other aircraft. This approval is limited to the installation in Cessna model 340A aircraft, Serial Number 340A0105 only. A copy of this Certificate, Addendum No. SA1263NW, and FAA Approved Flight Manual Supplement, dated June 23, 1981, shall be maintained as part of the permanent records for the modified aircraft. Date of Application: June 19, 1981 Date Reissued: July 22, 1988 Date of Issuance: June 23, 1981 Date Amended: FEDERAL AVIATION By Direction of the Administrator sang gmiel TAMINIST RATION Manager, Seattle Aircraft Modification Branch (Title) United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number: SA1263NN Supplemental Type Certificate ADDENDUM NO. SA1263NW The conditions and limitations of Type Certificate Data Sheet No. 3A25 apply except where superseded by the following: Supplemental Type Certificate Addendum, which is part of SIC SA1263NW, prescribes the conditions and limitations under which the STC was issued meets the airworthiness requirements of the Civil Air Regulations. Supplemental Type Certificate HOLDER: AAR Oklahoma, Inc. CESSNA MODEL 340A (NORMAL/RESTRICTED CATEGORY) AS MODIFIED BY STC SA1263NW Same as basic configuration except for the reduction of the never exceed speed and the limitation of the seating capacity to a total of 3 people. Airspeed Limitations (IAS): Never Exceed Speed (Vne): 200 Knots IAS Airspeed Indicator Instrument Markings (IAS): Never Exceed Speed (glide or dive, smooth air): 200 Knots IAS (red line) Required Placard: The following placard must be displayed in full view of the pilot: **CESSNA 340A, N5405J** NORMAL/RESTRICTED CATEGORY Vne: 200 KNOTS IAS AIRCRAFT LIMITED TO 3 PLACES This aircraft has been issued a multiple certificate of airworthiness permitting operation in the Standard and Restricted categories under the provisions of FAR 91.39 (with exception, See NOTE 2) and FAR 21.187(a). The aircraft may be covered from one category to another upon an inspection by an FAA inspector or by a certified mechanic to determine airworthiness. A logbook entry must be made by the persons performing the conversion. **FAA FORM 8110-2-1 (10-69) PAGE 30F 4 PAGES** United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number: SA1253NW Supplemental Type Certificate ADDENDUM NO. SA1263NW NOTE 2: SPECIAL PURPOSE RESTRICTED CATEGORY OPERATIONS This approval applies to the aircraft certified for the use of cloud seeding equipment; these limitations apply: 1. No persons other than the minimum crew required shall be carried. 2. This aircraft shall NOT be operated in any manner which will endanger public life and property, while over densely populated areas and near busy airports. NOTE 3: STANDARD (NORMAL CATEGORY) OPERATIONS 1. Prior to the carriage of passengers, the aircraft must be converted to the Standard Category of airworthiness and inspected by an FAA inspector or a certified mechanic. 2. The operating limitations in the form of manuals, placards, or markings shown in the aircraft specifications apply for the Standard Category. - END - 47. **PAGE 4 OF4 PAGES** ## Every issue (1) - July 22, 1988: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/62/ad/62adafd2f1befe45aa7e1aaefe0f9ab8e45de2c0390c2de326612c137703e4a2) --- 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.