# STC SA2580NM - Type: Supplemental type certificate - Status: Current, Issued - Holder: Alan L. Buchner, United States - Description: Installation of Continental I0-470-N engine and McCauley 2A36C23/84B-0 constant speed propeller. - Applied: August 31, 1983 - Status date: June 19, 1985 - Product: Aircraft - Certification basis: Part 21 - Data sheets: [TCDS 3A15](https://openairdocs.org/tcds/3A15) - Certificate PDF: https://openairdocs.org/files/sha256/67/48/6748928f8ba7492740d68b1a238cb73cc96ce6bce056db8755bfcef200b309bd - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/C8043BE5C8EFF02F862579D600719B57.0001 - DRS record last changed: December 6, 2025 - Page: https://openairdocs.org/stc/SA2580NM ## ADs that name it (0) None. ## Approved models (1) - Hawker Beechcraft Corporation H35 ([TCDS 3A15](https://openairdocs.org/tcds/3A15)) ## What the certificate says This is OCR from the scanned FAA certificate. OCR can misread letters and numbers. United States of America - 1045 Department of Transportation Federal Aviation Administration Supplemental Type Certificate Number: SA25800M This certificate issued to: Alan L. Buchner 970 w. Chandler ave. Fresno, CA 93706 Purt * / the CIVIL Air Regulations * See page 4 for complete certification basis. Original Product - Type bertificate Number: ЗА15 Make: Beech Mertel: H35, S/N D-5310 (Utility Category) N8220D & Engine Co. Report No. 3 dated December 1, 1983. See Continuation Sheets 3 and 4. FAA Approved Alan L. Buchner Airplane Flight Manual Supplement dated June 19, 1985 is required with this installation. Similalinsand bandition: Data not suitable for reproduction of installation in other aircraft; therefore, they are satisfactory for Beech K35, Serial No. D-5310 only. No additional modifications of this type are to be approved solely by reference to Supplemental Type Certificate or to the data submitted therefor. Supplemental Type Certificate Addendum No. SA2580NM is a part of the certificate. I not ted stret: mal no neanes this certificate and Buchner Airplane & Engine Co Report No. 3 shall be maintained as part of the permanent records for this modified aircraft. Date of Application: August 31, 1983 I we missu Date of Issuance: . June 19, 1985 I ate unsended FEDERAL AVIATION By Direction of the Administrator OHINISTRATD Western Aircraft Certification Office (Title) United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) (I) 19 June 1985 NumberSA2580NM Supplemental Type Certificate ADDENDUM NO. SA2580NM The conditions and limitations of Aircraft Specification No. 3A15 apply except as follows: This Addendum, which is part of Supplemental Type Certificate No. SA2580NM, prescribes conditions and limitations under which the product for which the Supplemental Type Certificate was issued meets the airworthiness requirements of the Civil Air Regulations. A copy of this Addendum shall be maintained as part of the modified aircraft's permanent records. Supplemental Type Certificate Holder: Alan L. Buchner I - Models H35, (Utility Category), as modified by STC SA2580NM. Engine Continental I0-470-N Fuel 100/130 Min. Grade Aviation Gasoline Engine Limits Takeoff 2600 RPM, 258HP, Full throttle (one minute) Maximum Continuous 2600 RPM, 240 HP, 26.8" M.P. @ S.L. 2600 RPM, 240 HP, 25.6" M.P. @ 3000 Ft. Straight line variation between points given. Propeller and McCauley 2A36C23E/S84B-0 Propeller Limits Hub Model: 2A36C23E Blade Model: 84B-0 Diameter: 84" Maximum 82" Minimum Pitch settings at 30 inch station: low 13.3° high 29.7° Governor: Woodward 210452 Oil Capacity 10 quarts at Station (+26) Powerplant Instrument Markings Tachometer: 2600 RPM Maximum (Red Radial) 1600 to 2600 RPM (Normal Green Arc) Manifold Pressure: Maximum 29.8" Hg (Red Radial) Caution 26.8" to 29.8" (Yellow Arc) Normal 15" to 26.8" (Green Arc) Metered Fuel Pressure (Fuel Flow) Gage: Minimum - 1.5 psi (Red Radial) Maximum - 17.5 psi (Red Radial) Normal - 6.9 to 21.6 gph (Green Arc) **FAA FORM 8110-2-1 (10-69) PAGE 3 OF 4 PAGES** United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) (I) 19 June 1985 NumbesSA25300M Supplemental Type Certificate ADDENDUM NO. SA2580NM Serial Numbers Eligible: D-5310 Required Equipment In addition to the equipment applicable and required by Aircraft Specification No. 3A15, the equipment specified by Buchner Airplane & Engine Co. Report No. 3 must be installed as a result of the incorporation of this STC. Certification Basis Part 3 of the Civil Air Regulations as amended to May 15, 1956 and FAR 23.955(c) effective December 20, 1973 in lieu of CAR 3435. NOTE I: Current weight and balance report including list of equipment included in certificated empty weight, and loading instructions when necessary, must be in the aircraft. NOTE 2: The following placards must be installed: In full view of the pilot - Engine Power Limits: 'TAKEOFF 2600 RPM, 258 HP, FULL THROTTLE (one minute) MAXIMUM CONTINUOUS 2600 RPM, 240 HP, 26.8" H.P. @ S.L. 2600 RPM, 240 HP, 25.6" H.P. @ 3000 Et. STRAIGHT LINE VARIATION BETWEEN POINTS GIVEN." On fuel filler caps: "USE 100/130 OCTANE FUEL ONLY" At alternator switch/circuit breaker: DO NOT TURN OFF ALTERNATOR IN FLIGHT EXCEPT IN CASE OF EMERGENCY" END 47. **PAGE4 OF4 PAGES** ## Every issue (1) - June 19, 1985: Issued, Current. [certificate](https://openairdocs.org/files/sha256/67/48/6748928f8ba7492740d68b1a238cb73cc96ce6bce056db8755bfcef200b309bd) --- 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.