STC SA2370NM

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate Number: SA2370NM This certificate issued to: George F. DeMartini Certifies that the change in the type design for the pillowing product with the limitations and conditions therefor as specified hereen mels the nireshiness requirements f Purt 42 of the Civil Air Fregulations Original Product - Type Bertificale: Jumber A-743 Matie Boeing Mertel A75N1 Description of Type Design Change:

Installation of a Pratt & Whitney R-985-AN-3 engine and a 24 volt electrical system per Mr. George F. DeMartini's photographs (1) through (10), and later FAA approved revision.

Data pertaining to this modification are considered inadequate for duplication in other aircraft. This approval is limited to the installation in Boeing A75N1, Serial Number 75-2227 only. A copy of this Certificate and Addendum shall be maintained as part of the permanent records for the modified aircraft.

Valesfappluatun January 31, 1984 I ate misued I ate fissance: April 11, 1984 Date Amended:

FEDERAL AVIATION By Direction of the Administrator ( Signature TOMINISTRATO A Manager, Seattle Aircraft Certification Office Y Title s 47 FAA FORM 8110-2 (10-68)

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) April 11, 1984 c Number: SA2370NM Supplemental Type Certificate ADDENDUM NO. SA2370NM The conditions and limitations of Type Certificate Data Sheet No. A-743 apply except where superseded by the following:

Supplemental Type Certificate Addendum, which is part of STC SA2370NM, prescribes the conditions and limitations under which the product for which the STC was issued meets the airworthiness requirements of the Civil Air Regulations. A copy of this STC Addendum is required to be maintained as part of the permanent records for the modified aircraft.

Supplemental Type Certificate HOLDER: George F. DeMartini I. BOEING MODEL A75N1 (NORMAL CATEGORY) AS MODIFIED BY SIC SA2370NM Engine: Pratt & Whitney R-985-AN-3 Fuel: 80/87 octane minimum grade aviation gasoline Engine Limits: Takeoff (1 min.) 2300 rpm (450 Hp) Maximum continuous power - 2000 rpm full throttle Propeller and Propeller Limits: Hamilton Standard 2D30-6101A-12 Diameter: 10'0" maximum; 8'0" minimum Powerplant Instruments: Mark Instruments as Follows:

Oil Temperature:

Red Line 200 F - maxiaum Oil Pressure:

Red Line 50 psi rpm maximum; 100 psi minimum Tachometer:

Red Line 2300 rpm - maximum Fuel Pressure:

Red Line 2 psi maximum; 6 psi minimum Cylinder Head Temperature (Washer Type Thermocoupie Red Line 550 F - maximum

FAA FORM 8110-2-1 (10-69) PAGE 3OF 4 PAGES

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Shect) APriT 11, 1984 Number SA2370NK SUPPL Supplemental Type Certificate ADDENDUM NO. SA2370NM C. G. Range: See Type Certificate Data Sheet A-743 Maximum Weight: See Type Certificate Data Sheet A-743 Placards: The following placards are to be in front and in full view of the pilot:

ENGINE LIMITATIONS

TAKE-OFF ONE MIN 450 HP - 37" HG @ 2300 RPM

METO POWER 400 HP - 30" HG @ 2000 RPM CONDUCT COOLING CLIMBS @ 100 MPH CAS

CAUTION DO NOT OPERATE AIRCRAFT WHEN OAT IS ABOVE 85°F

FAA FORM B110-2-1 (10-69) PAGE 4 OF 4 PAGES