STC SA10741SC

Part 3 of the Civil Air Regulations.

Description of Type Design Change: Installation of a Pratt and Whitney Canada PT6A-135 or PT6A-135A engines in accordance with Drawing No. 70101-00, Revision F, dated April 12, 2010 or later FAA approved revision. Required instructions for continued airworthiness are contained in document no. 70101-30, Revision A, dated April 21, 2010.

Limitations and Conditions : Compatibility of this design change with previously approved modifications must be determined by the installer. 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. The Pratt and Whitney Canada PT6A-135 and PT6A-135-A engines are limited to 1520 ft-lbs torque or 550 horsepower at 1900 RPM.

See Continuation on page 3 of 3

Certification Basis: 23.1, 23.21, 23.23, 23.33(a)(d), 23.45(except h), 23.49, 23.51,(a)(b), 23.53(except c), 23.63(a)(c), 23.65(b),

23.66, 23.67(b), 23.69, 23.73(b), 23.75, 23.77(b), 23.141, 23.143, 23.149(a)(b)(e), 23.171, 23.173, 23,175(a), 23.181(a), 23.201,

23.901(a)(b)(e), 23.903(a)(e)(f)(g), 23.905, 23.907, 23.925, 23.939, 23.1041, 23.1043, 23.1045, 23.1141(b)(c), 23.1143(c), 23.1501,

23.1513, 23.1521, 23.1529, 23.1541, 23.1543, 23.1549, 23.1581, 23.1583(b)(n), 23.1585, 23.1587(except d) {all to Amendment 23- 55}

Silverhawk Aviation 1751 West Kearney Ave.

Lincoln, NE 68524 3A20 Make : Hawker Beechcraft Corporation Model : C90; C90A and E90 Date reissued :

Date amended : August 26, 2010

( Signature) S. Frances Cox Manager, Special Certification Office Southwest Region

( Title)

Date of application : March 12, 2007

Date of issuance : October 16, 2007

FAA Form 8110-2-1(10-69) Page 2 of 3

FAA Form 8110-2-1(10-69) Page 3 of 3

Number SA10741SC Date of Issuance: October 16, 2007 Date Amended: August 26, 2010

The following and applicable Airplane Flight Manual Supplements are required:

Airplane Model Airplane Serial Number Airplane Flight Manual Supplement PT6A-135A Engines Installed C90 All AFMS 70101-C90 dated SEP 20 2007, or later FAA approved revision C90A LJ-1063 thru LJ-1137, LJ-1146 AFMS 70101-C90AL dated SEP 20 2007, or later FAA approved revision C90A LJ-1138 thru LJ-1755, except for LJ- 1146, LJ-1727, and LJ-1754 AFMS 70101-C90AH dated SEP 20 2007, or later FAA approved revision E90 All AFMS 70101-E90 dated SEP 20 2007, or later FAA approved revision PT6A-135 Engines Installed C90 All AFMS 70102-C90 dated July 13, 2010, or later FAA approved revision C90A All AFMS 70102-C90A dated July 13, 2010 or later FAA approved revision E90 All AFMS 70102-E90 dated July 13, 2010 or later FAA approved revision