STC SA3593NM

(See Continuation Sheet Page 3 of 4 Pages) SA3593NM Raisbeck Engineering Inc.

2811 South 102nd Street, Suite 100 Tukwila, WA 98168 Part * the * Regulations * * *See attached Federal Aviation Administration (FAA) Approved Model List (AML) SA3593NM for approvedaircraft models and applicable airworthiness regulations.

Installation of Raisbeck/Hartzell Quiet Turbofan Propellers or Swept Turbofan Propellers, and optional Increased Gross Weight in accordance with Raisbeck Engineering Master Drawing List 86-2500, Revision CW, dated February 8, 2017, or later Federal Aviation Administration (FAA) approved revision.

March 11, 1986 September 1, 2023 September 12, 1986 4/1/88; 5/19/88; 6/14/88; 11/21/88; 2/23/89; 9/28/90; 4/29/91; 7/22/94;

8/11/94; 11/8/95; 2/24/06; 5/9/06; 3/15/08; 9/2/08; 9/19/08; 12/9/08;

11/4/09; 11/9/10; 7/27/12; 12/31/13; 8/19/14; 11/10/15; 4/1/16, 4/17/17 for Manager, West Certification Branch Approval of this change in type design applies to the aircraft models listed on the AML only and is subject to the limitation contained in the AML. This approval should not be extended to other aircraft of these models on which other previously approved modifications are incorporated unless it is determined that the relationship between this change and any of those other previously approved modifications, including changes in type design, will introduce no adverse effect upon the airworthiness of that aircraft.

Aircraft must be operated in accordance with the applicable FAA-approved Airplane Flight Manual Supplement (AFMS) listed on the latest amendment of AML SA3593NM, or later FAA-approved AFMS revision. Aircraft must be maintained in accordance with the Raisbeck Engineering Maintenance Manual Document No. 85-120, Revision AC, dated December 7, 2016, or later FAA-approved revision.

SA3593NM

SA3593NM A copy of this Certificate and AML, FAA-approved AFMS, and Maintenance Manual Supplement must be maintained as part of the permanent records for the modified aircraft.

Propellers and Propeller Limitations:

For 2 Hartzell HC-D4N-3C Hubs with Hartzell D9290K Blades in Pairs.

Diameter 93.0 inches (Maximum); Minimum allowable for repair: 92.0 inches No further reduction in diameter permitted.

Pitch Settings:

Low Pitch: +20.1 deg ±0.1 deg Reverse: -9.0 deg ±0.5 deg Feathered: +84.5 deg ±0.5 deg

Stabilized ground operation is prohibited between 400 and 1,100 RPM. Propellers must be feathered for stabilized ground operation at or below 400 RPM.

Auto-feathering system must be installed and operational, except when optional propeller cam is installed.

Optional Propellers and Propeller Limitations:

For C90A Aircraft Models only.

Hartzell Model No. HC-E4N-3N/D8990(K) as listed on and installed in accordance with STC SA00966CH

For C90GT/C90GTi Aircraft Models only.

Hartzell Model No. HC-E4N-3N/D8990SK as listed on and installed in accordance with TCDS 3A20

End Limitations and Conditions continued:

SA3593NM Propellers and Propeller Limitations:

For 2 Hartzell HC-D4N-3C Hubs with Hartzell D9510SK Blades in Pairs.

Diameter 96.0 inches (Maximum); Minimum allowable for repair: 95.0 inches No further reduction in diameter permitted.

Pitch Settings:

Low Pitch: +18.6 deg ±0.1 deg Reverse: -10.0 deg ±0.5 deg Feathered: +86.7 deg ±0.5 deg

Stabilized ground operation is prohibited between 500 and 1,100 RPM. Propellers must be feathered for stabilized ground operation at or below 500 RPM.

Auto-feathering system must be installed and operational.

For 2 Hartzell HC-E4W-3 Hubs with Hartzell D9290K Blades in Pairs.

Diameter 93.0 inches (Maximum); Minimum allowable for repair: 92.0 inches No further reduction in diameter permitted.

Pitch Settings:

Low Pitch: +17.1 deg ±0.1 deg Reverse: -9.0 deg ±0.5 deg Feathered: +84.5 deg ±0.5 deg

Stabilized ground operation is prohibited between 400 and 1,100 RPM. Propellers must be feathered for stabilized ground operation at or below 400 RPM.

Auto-feathering system must be installed and operational.

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.