STC SA1943WE

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate Number: SA1943WE This certificate issued to: Madras Air Service Part 3 of the CIVIL AIT Pregulations: (See T. C. Data Sheet 5A6) Original Product - Type Certificate Number: 546 Make: Cessna Model: 180 through 180K Dom/lin/ hype Madras Air Service wing tips in accordance with Drawing No. 102, Sheet Installation 1, Revision A, dated October 12, 1972, and Sheet 2, Revision B, dated July 11, 1972.

Madras Air Service FAA Approved AFM Supplement dated February 21, 1973 is required for the Models 180, 180A and 180B. In addition, FAA approved AFM Supplement dated July 21, 1987 is required for Model 180K for S/N 18053001 and on.

This approval should not be extended to other specific Limitations and Conditions:

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. Supplemental Type Certificate Addendum Number SA1943WE limits the airspeeds and is a part of this STC. A copy of this Certificate, Addendum No. SA1943WE, and the appropriate FAA approved Airplane Flight Manual are required to be maintained as part of the modified aircraft's permanent records.

7. Кват TMINISTRANO Assistant Manager, Seattle Aircraft Certification Office (Title ) 47

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number Supplemental Type Certificate ADDENDUM NO. SA1943WE The conditions and limitations of Type Certificate Data Sheet No. 5A6 apply except as follows:

This STC Addendum, which is a part of Supplemental Type Certificate No.

SA1943WE 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 STC Addendum is required to be maintained as part of the modified aircraft's permanent records.

Supplemental Type Certificate Holder: Madras Air Service I, II, & III: Models 180, 180A, 180B, 180C, 180D, 180E, 180F as modified by SIC SA1943WE Airspeed Limits * (Landplane and Seaplane) ** Never exceed 175 mph (152 kts) TIAS Maneuvering 116 mph (101 kts) Maximum structural cruising 152 mph (132 kts) Required Equipment:

Madras Air Service AFM Supplement dated February 21, 1973, required for Models 180, 180A, and 180B.

IV: Models 180G and 180H, as modified by STC SA1943WE.

Airspeed Limits * (Landplane and Seaplane) ** Never exceed 182 mph (158 kts) CAS Maneuvering 122 mph (106 kts) Maximum structural cruising 152 mph (132 kts) 47 PAGE 3 OF 4 PAGES

V. Models 180J (Landplane and Seaplane) ** Never exceed 182 mph (158 kts) CAS Maneuvering 117 mph (102 kts) Maximum structural cruising 152 mph (132 kts) VI. Model 180K (Landplane & Seaplane) Airspeed Limits * (Landplane & Seaplane) ** Never exceed 184 mph (160 kts) TAS Maneuvering 119 mph (103 kts) Maximum structural cruising 152 mph (132 kts) * These Airspeed Limitations may be used in lieu of gross weight reductions imposed by the original STC and Addendum dated June 18, 1969.

** Amphibians modified by STC SA1943WE use TC Data Sheet No. 5A6 Airspeeds.

NOTE 1. Conformity to Madras Air Service Drawing No. 102, Sheet 1, Revision A, dated October 12, 1972, and Sheet 2, Revision B dated July 11, 1972, must be established prior to release of the modified aircraft to Normal Category operations.

NOTE 2. In addition to the changes required above, the aircraft Weight and Balance Report must be revised as follows at the time of modification.

Weight of wing tips 9.5 1b total; deduct weight of the tip being removed and add the difference to the aircraft empty weight. The moment change is negligible.

HOTE 3. The placards required by Type Certificate Data Sheet 546, Note 2, A must be revised as follows:

(1) & (2) On Models 180 and 180A through F Maximum Maneuvering Speed - 116 mph TIAS (101 kts)

(3) (a) On Models 180G, 180H Maximum Maneuvering Speed - 122 mph CAS (106 kts)

(4) (a) On Model 180J Maximun Maneuvering Speed - 117 mph CAS (102 kts)

(5) (a) On Model 180K Maximum Maneuvering Speed - 119 mph IAS (103 kts) Page 4 of 4