STC SA474NW

FAA Form 8110-2 (5/14) Page 1 of 6

Reissued on July 31, 2017 to supersede the original STC, which has been lost or misplaced.

Number: SA474NW

Part 3 of the Civil Air Regulations, dated 11/1/49 (See T.C. Data Sheet 3A25 for amend)

Original Product – Type Certificate Number: 3A25 Make: Cessna Model: 340/340A

Installation of Fowler Flaps in accordance with FAA sealed Robertson Aircraft Drawing List No. 34. This STC valid for airplanes with or without STC SA186NW (increased horsepower).

Date of Application: March 10, 1977 Date Reissued: 11/8/84; 4/6/89; 9/8/05; 7/31/17 Date of Issuance: June 27, 1977 Date Amended: 8/1/77; 10/24/78; 9/10/79 Rev. 3

Signature

Title Jim Grigg Manager, Fort Worth A CO Branch, Compliance & Airworthiness Division Sierra Industries, Ltd.

122 Howard Langford Drive Uvalde, TX 78801

FAA Form 8110-2 (5/14) Page 2 of 6

Transfer the ownership of Supplemental Type Certificate Number: SA474NW

To (Name and address of transferee)

From (Name and address of grantor)

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number: SA474NW

FAA Form 8110-2 (5/14) Page 3 of 6

Date of Issuance: June 27, 1977 Amended Date: September 10, 1979 Date of Reissuance: July 31, 2017

The approval of this change in type design applies basically to the above model aircraft 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 that the interrelationship between this change and any other type design changes or previously approved modifications will introduce no adverse effect upon the airworthiness of that aircraft. A copy of this Certificate shall be maintained as part of the permanent records for the modified aircraft.

SUPPLEMENTAL TYPE CERTIFICATE ADDENDUM NO. SA474NW

The limitations and conditions of Type Certificate Data Sheet 3A25 except as follows:

This Addendum which is part of Supplemental Type Certificate No. SA474NW prescribes 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 Addendum shall be maintained as part of the modified aircraft permanent records.

SUPPLEMENTAL TYPE CERTIFICATE HOLDER: R/STOL SYSTEMS, INC.

I. MODEL 340/340A

Airspeed Limits: Remain the same, except for:

Flaps extended 10° 168 KIAS (193 MPH IAS) Flaps extended 30° 124 KIAS (143 MPH IAS)

C. G. Limits: Remain the same.

Control Surface Movements: Remain the same, except for:

Wing Flaps Down 30°

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number: SA474NW

FAA Form 8110-2 (5/14) Page 4 of 6

Date of Issuance: June 27, 1977 Amended Date: September 10, 1979 Date of Reissuance: July 31, 2017

REQUIRED PLACARDS:

a. “Operational Limits” (in full view of pilot) Replaces existing placard Speeds in KIAS or MPH IAS.

1. Model 340 all serial numbers and Model 340A serial numbers 340A0001 through 340A0600.

A. This airplane must be operated as a normal category airplane in compliance with the operating limitations stated in the form of placards, markings and handbooks (pilots checklist).

B. No acrobatic maneuvers including spins approved.

C. Air minimum control Speed: Flaps up 84 KIAS (takeoff) (97 MPH) Flaps 10° 75 KIAS (86 MPH) Flaps 30° 67 KIAS (77 MPH)

D. Maximum gear extended and operating speed:

140 KIAS (161 MPH)

E. Maximum flap extended speed:

(10° flap 168 KIAS 193 MPH) (30° flap 124 KIAS 143 MPH)

F. Maximum maneuver speed: 155 KIAS (179 MPH)

2. Model 340A serial numbers 340AD601 and up.

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number: SA474NW

FAA Form 8110-2 (5/14) Page 5 of 6

Date of Issuance: June 27, 1977 Amended Date: September 10, 1979 Date of Reissuance: July 31, 2017

b. “Flap Selector Placard” Position adjacent to flap position indicator.

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number: SA474NW

FAA Form 8110-2 (5/14) Page 6 of 6

Date of Issuance: June 27, 1977 Amended Date: September 10, 1979 Date of Reissuance: July 31, 2017

c. “Takeoff Flap Position” Position in full view of pilot.

A. “Position flaps 10° for takeoff Flaps up takeoff not approved”

d. “Autopilot Limitation Placard” Position in full view of pilot near autopilot near autopilot control.

A. “Maximum 10° Flaps with auto pilot engaged”

II. All autopilots approved on the basic models are compatible with this modification and subject to the limitations established during each autopilot certification test.

The following additional limitations apply to all autopilots:

Maximum 10° Flaps with autopilot engaged.

III. Pilot’s Operating Handbook Supplement and FAA approved Airplane Flight Manual Supplement, POHS 34- 2, is required for Model 340A serial numbers 340A0601 and up, must be carried in the airplane at all times.

-END-

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number: SA474NW

FAA Form 8110-2 (5/14) Page 7 of 6