STC SA4172WE

United States of America 9123 Department of Transportation Federal Aviation Administration Supplemental Type Certificate Reissued to replace certificate reported lost.

Number: SA4172WE This certificate issued to: MID CAL DUSTERS P.O. Box 97 Selma, California 93662 Part 8* of the Civil Air Pegulations. *Certification basis is set forth in Type Certificate Data Sheet A9SW Revision No. 2.

Original Product Type Certificate Number: AISW Make: Air Tractor Model: AT-301 Description of Type Design Change: Installation of Hamilton Standard 3D40-209 Hub with 6101A-18 Propeller Blades in accordance with MID CAL DUSTERS installation instructions No. 100 dated May 12, 1980.

Limitations and Conditions: The approval of this change in type design applied basically to Air Tractor Model AT-301 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 by the installer that the interrelationship between this change and any of those other previously approved modifications will introduce no adverse effect upon the airworthiness of that aircraft. This determination should include consideration of significant changes in weight distribution such as an increase in the fixed disposable weight in the fuselage. 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. See continuation sheet

Date of Application: June 5, 1979 Date Reissued: March 18, 1999 Date of Issuance: June 20, 1980 Date Amended:

FEDERAL AVIATION By Direction of the Administrator Carlta K. Woo (Signature) Manager, Technical & Administrative Support TOMINSTRATO Staff, Los Angeles Aircraft Certification Office (Title)

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number: SA4172WE Date of Application: June 5, 1979 Date of Issuance: June 20, 1980 Date Reissued: March 16, 1999 Limitations and Conditions: (Continued) H. P. RPM MP ALT ENGINE LIMITS: Takeoff (5 min) 600 2250 36.0 SL Max. Cont. 525 2100 33.5 SL Max. Cont. 530 2100 32.5 4500 PROPELLER AND PROPELLER LIMITS: Hamilton Standard Constant Speed

(a) Hub 3D40-209 Blades 6101A-18 Diameter Not over 102 5/8 Not under 100 5/8 No further reduction for maintenance is permitted.

Pitch setting at 42 inch station High: 19.0° Low: 11.5°

(b) Hamilton Standard Governor 1M12-G POWERPLANT INSTRUMENT MARKINGS:

Tachometer 2250 RPM Red Radial 1400-2100 RPM Green Arc 2100-2250 RPM Yellow Arc Manifold Pressure 36 in. Hg Red Radial

19-33.5 in. Hg Green Arc

33.5-36.0 in. Hg Yellow Arc END

47.