STC SR00283SE

SR00283SE Croman Corporation 801 Avenue C White City, Oregon 97501 7 the Civil Air Regulations 1H15 Sikorsky S-61L and S-61 N (Transport Category Only) Removal of fifty (50) inch section from the forward fuselage between stations 110 and 160 and reinstallation of the forward cabin with associated fabricated parts in accordance with an FAA approved copy of McClenahan Engineering Shortsky Master Drawing List No. DM9513-3, Revision H, dated May 5, 1998, or later FAA approved revision.

Approval of this change in type design applies to basic Sikorsky Model S-61L and S-61N rotorcraft equipped with the components listed on page 3 of this STC only. (See continuation sheets 3 through 5.)

September 15, 1995 March 21, 2024 February 26, 1996 August 4, 1999 for Christina Underwood Manager, East Certification Branch 5

SR00283SE 5

SR00283SE Airworthiness Requirements: (continued) CiviI Air Regulations dated August 1,1956, including amendments 7-1 through 7-4. See TCDS No. 1H15 for other certification basis.

Limitations and Conditions: (continued) This approval should not be extended to rotorcraft 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 rotorcraft.

Rotorcraft altered to install this shortened fuselage modification must be operated in accordance with those Helipro Rotorcraft Flight Manual Supplements (RFMSs) listed below. The modified rotorcraft must be maintained in accordance with the latest revisions of the basic Sikorsky Maintenance Manuals and Rotorcraft Overhaul and Retirement Schedules for the S-61 Land S-61 N rotorcraft. A copy of this certificate, continuation sheet No. SR00283SE, and the appropriate FAA approved Helipro RFMSs must be maintained as part of the permanent records for the modified rotorcraft.

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.

Required Components:

The shortened rotorcraft must be equipped with those components listed in the basic Sikorsky Rotorcraft Flight Manuals and Rotorcraft Flight Manual Supplements identified below, with the following exceptions:

a. For 14 CFR Part 133 external load operations to a maximum cargo weight of 10,000 lbs., the Shortsky must be equipped with a Carson cargo hook sling system installed in accordance with - (S-61 L) Transport Canada STA No. P-LSH91-344, or (S-61 N) STC No. SH639NE.

SR00283SE Limitations and Conditions: (continued)

b. Sikorsky Bifilar Assembly PIN S6 I 12-23039-017 must be installed on both the shortened S-61L and S-61N rotorcraft.

c. The shortened S-61 N rotorcraft must be equipped with either a S-61 L type landing gear system in accordance with Sikorsky Aircraft Drawing No. S6107-25112, "Modification Kit, Sponson to Fixed Landing Gear", in accordance with Note 5 of the Type Certificate Data Sheet No. I H 15; or with S-61 N landing gear and sponsons PIN S6125-50202-l (L.H.) and -2 (R.H.) and S6125-51200-1 (L.H.) and -2 (R.H.), respectively.

d. The flight test prototype rotorcraft were each flown with Sikorsky Engine Air Inlet Screen PIN 61-51-58-00 installed. Accordingly, this air screen is approved for use with the shortened fuselage modification. Also, the rotorcraft may be flown without an air screen in accordance with the basic Rotorcraft Flight Manual. The flight test data indicates that this installation is also compatible with all factory snow and ice shield configurations.

Rotorcraft Flight Manual Supplements (RFMSs):

The following FAA approved Helipro Rotorcraft Flight Manual Supplements, each dated February 6, 1996, (unless otherwise noted) or later FAA approved revisions, are required for this shortened installation:

S-61L

a. HCI Supplement No. I to FAA approved Sikorsky S-61 L Rotorcraft Flight Manual (basic flight manual), dated April 10, 1970, revised January 19, 1989.

b. HCI Supplement No. 2 to FAA approved Sikorsky S-61 L Rotorcraft Flight Manual Supplement No. 6 ( covers the carriage of internal loads to grow weights of 22,000 lbs.), dated April 15, 1974, revised October 3, 1980.

SR00283SE Limitations and Conditions: (continued) S-61N

a. HCI Supplement No. 1 to FAA approved Sikorsky S-6 IN Rotorcraft Flight Manual (basic flight manual), dates September 9, 1963, reissued December 17, 1971, revised January 19, 1989.

b. HCI Supplement No. 2 to FAA Approved Sikorsky S-61 N Rotorcraft Flight Manual Supplement No. 15 (covers the carriage of internal loads to gross weights of20,500 lbs.), dated September 9, 1977, revised May 19, 1986.

c. HCI Supplement No. 3 to FAA approved Sikorsky S-61 N Rotorcraft Flight Manual Supplement No. 16 (covers the carriage of external loads to a gross weight of 22,000 lbs.), dated October 20, 1977, revised October 3, 1980.

Date Reissued: (continued) September 10, 2005 February 3, 2016 March 7, 2016

Date Amended: (continued) May 14, 1998

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