STC SA4-230

United States Of America Department of Transportation - Federal Aviation Administration Supplemental Type Certificate This certificate has been reissued to replace the original certificate reported as lost.

This Certificate issued to Preferred Improvements, LLC 11234 Hackett Rd. P. O. Box 12 Kidron, Ohio 44636 Kidron, Ohio

Part 4a of the Civil Air Regulations.

A-618 and A-669 Boeing DC-3, DC-3A, DC-3C, and DC-3D Description of Type Design Change: Installation of aileron gap closure, per drawings listed on Ben Howard and Associates, Inc. Sealed Data List No. 1005.

Limitations and Conditions: The approval of this change in type design applies basically to standard models DC-3, DC-3A, DC-3C, and DC-3D airplanes only. This approval should not be extended to other specific airplanes of this model on which other previously approved modifications are incorporated unless it is determined that the interrelationship between this change and any of those other previously approved modifications will introduce no adverse effect upon the airworthiness of that airplane. A copy of this STC must be included in the permanent records of the modified aircraft. 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 on Page 3).

Date of application : June 6, 1957

Date of issuance : June 19, 1957

Date reissued : September 27, 1974 February 25, 2016

(Signature) Manager, Airframe Branch Los Angeles Aircraft Certification Office

Transfer the ownership of the Supplemental Type Certificate Number to (Name of transferee) (Address of transfer) (Number and street)

(City, State, and Zip code) from (Name of grantor) (Print or type) (Address of grantor) (Number and street)

(City, State, and Zip code) Extent of Authority (if licensing agreement):

Signature of grantor (In ink):

United States Of America Department of Transportation - Federal Aviation Administration Supplemental Type Certificate Number SA4-230 Continuation Sheet 1

The following airspeed (TIAS) limits are applicable:

Aircraft Weights SPEEDS Up to and Including 25,200 pounds 25,200 to 26,900 pounds

Aircraft placards and Airplane Flight Manual, VL 195 mph (170 knots) 183 mph (159 knots) when required must be revised accordingly. Vne 233 mph (202 knots) 219 mph (190 knots)

END