STC SR03664NY

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

Part of the

Signature

Title SR03664NY Coulson Aircrane Ltd.

4890 Cherry Creek Road Port Alberni, British Columbia Canada V9Y 8E9 Federal Aviation Regulations.

1. Installation of the Engine Inlet Barrier Filter System (IBFS) in accordance with Coulson Aircrane Ltd. Drawing List CAL-IBF-DL-01, Revision B, Transport Canada Civil Aviation (TCCA) approved June 12, 2015 or later TCCA approved revision.

2. Operation of the aircraft with the IBFS installed must be in accordance with TCCA approved Coulson Aircrane Ltd., Rotorcraft Flight Manual Supplement (RFMS) CAL-S61-IBF-FMS-001, Revision B, TCCA approved February 16, 2016, or later TCCA approved revision.

(See Description of Type Design Change continued on Page 3 of 3)

1. Maintenance and Inspection of the the IBFS installed must be in accordance with Coulson Aircrane, Ltd.

Instructions for Continued Airworthiness (ICA) CAL-S61-ICA-001 Revision A, dated February 15, 2016, or later TCCA accepted revision.

2. Operation of the aircraft with the IBFS installed must be in accordance with TCCA approved Coulson Aircrane Ltd., RFMS CAL-S61-IBF-FMS-001, Revision B, TCCA approved February 16, 2016, or later TCCA approved revision.

(See Limitations and Conditions continued on Page 3 of 3) Mazdak Hobbi Acting Manager New York Aircraft Certification Office Sikorsky Aircraft S-61N November 29, 2016 June 16, 2015 February 17, 2016 IMPORT 1H15 3

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

To (Name and address of transferee)

From (Name and address of grantor)

3 SR03664NY

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

3 Date Amended: November 22, 2016

Description of Type Design Change (continued):

3. Maintenance and Inspection of the the IBFS installed must be in accordance with Coulson Aircrane, Ltd.

ICA CAL-S61-ICA-001 Revision A, dated February 15 2016, or later TCCA accepted revision.

3. Installation of the IBFS will include the following limitations:

a. Power Assurance Check (PAC) must be completed and passed before the first flight of the day. The PAC is considered to pass if there is a T5 margin of +15 degrees Celsius and a Ng margin of +0.6% or greater under the maximum allowable Power Assurance Check target values.

b. When Maximum Altitude for Take-off and Landing is 5000 ft or less pressure altitude, IBFS operations are limited to the S-61N Ice Shield Installed Weight Altitude Temperature (WAT) limits.

c. When Maximum Altitude for Take-off and Landing is higher than 5000 ft up to a maximum of 8000 ft pressure altitude, IBFS operations are limited to the S-61N Ice Shield Installed WAT limits MINUS 300 pounds.

Take-off and Landing at altitudes higher than 8000 ft pressure altitude is prohibited.

4. Rotorcraft equipped with IBFS approved under this STC have not demonstrated a capability for operations with respect to engine air induction system in snow. Flight in ambient temperatures less than, or equal to, +5 degree Celsius (+41 degree Fahrenheit) is prohibited.

5. This STC is limited to only the following rotorcraft serial numbers: 61242, 61744, 61764, 61827, 61761, 61703, 61718, 61738, 61749, 61712.

6. The installer must determine whether this design change is compatible with previously approved modifications.

7. If the holder agrees to permit another person to use the certificate to alter the product, the holder shall give the other person written evidence of that permission.

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