STC SH5654NM

Number SH5654NM

This certificate, issued to Croman Corporation 801 Avenue C White City, OR 97503

Part 21.25* of the Federal Aviation Regulations. *and ASW-110 memorandums dated June 4, 1991, and January 6, 1992.

Original ProductType Certificate Number: H2EA Make: Sikorsky Model: S-61A (Restricted Category Only) Description of the Type Design Change: Installation of Croman 10,000 lbs. cargo sling system and associated fuselage mounting hardpoints in accordance with a Federal Aviation Administration (FAA) approved copy of Croman Master Drawing List No. JS1315, dated December 7, 1990, or later FAA-approved revision. These modified helicopters must be operated in accordance with the NATOPS Flight Manual NAVAIR 01-230HLC-1, Change 2, dated March 15, 1987, and with the Croman Rotorcraft Flight Manual Supplement RFMS-S61A-1, Revision 4, dated January 9, 2020, or later FAA-approved revision.

Limitations and Conditions: This approval is limited to the installation in Sikorsky Model S-61A helicopter Serial Nos. 61083, 61094, and 61161, only. These helicopters have been modified and approved to operate at 21,000 pounds gross weight. This STC only approves the installation of a Croman 10,000 pounds cargo sling system and associated fuselage mounting hardpoints and does not approve the basic helicopter configuration that allows these helicopters to operate at 21,000 pounds gross weight. In order for these helicopters to be eligible for this cargo sling system, they must be equipped and modified in accordance with the requirements specified on the Continuation Sheets, page 3 and 4, of this supplemental type certificate (STC). A copy of this certificate, the NATOPS Flight Manual, and the FAA-approved Rotorcraft Flight Manual Supplement must be maintained as part of the permanent records of these modified helicopters.

Date of application: March 26, 1991 Date reissued: April 4, 2011 Date of issuance: November 26, 1991 Date amended: March 17, 1992; November 5, 2014;

January 22, 2020

FAA FORM 8110-2 (5/14) PAGE 1 OF 4 PAGES By direction of the Administrator

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U.S. GPO: 1987-763-289

Number SH5654NM Croman Corporation Issued: November 26, 1991 Reissued: April 4, 2011 Amended: March 17, 1992; November 5, 2014; January 22, 2020

This Croman cargo sling can only be installed on Sikorsky Model S-61A helicopters equipped with the following major components:

(1) General Electric CT58-140 engines installed in accordance with Note 8 of TCDS H2EA (refer ence Sikorsky Drawings S6130-80048, S6130-80140, S6130-80142 and applicable sections of Service Instruction No. 61-3A).

(2) Main rotor transmission Part Number (P/N) S6135-20600-27, P/N S6135-20600-33 or P/N S6135-20600-39, and P/N S6135-20600-31, P/N S6135-20600-32AM, or P/N S6135-21000-018.

(3) Main rotor head P/N S6110-20003-044, or P/N S6110-20003-045.

(4) Main rotor blades P/N 61170-20201-062 or P/N 61170-20201-067 or optional Carson Helicopters Composite Main Rotor Blades (P/N 163-101-1) installed per FAA STC SR01585NY.

(5) Throttle quadrant P/N S6130-61118-002 (reference Sikorsky Drawings S6130-61118, S6130-62055, S6130-62024, and S6130-62013).

(6) Cargo hook mechanical release and stowage as shown on Sikorsky installation Drawings S6150-62580-011 and S6150-62580-013.

(7) Cargo hook electrical release as shown on Sikorsky wiring diagram S61088-55269.

If the optional Carson Helicopters Composite Main Rotor Blades (P/N 163-101-1) are installed (Item 4 above), the following additional items must be installed:

(8) Ribbed pocket tail rotor blades (P/N S6117-30101-043 and subsequent) or Carson composite tail rotor blades (P/N 428-600-1 and subsequent; STC SR04122NY).

(9) Bifilar assembly (P/N S6112-23039-017 or S6112-23039-018).

(10) Beam Pitch Control Tail Gear Box (P/N S6135-66705-1 and subsequent).

(11) Fixed Land Gear or Sponson Gear.

FAA FORM 8110-2 (5/14) PAGE 3 OF 4 PAGES

Number SH5654NM Croman Corporation Issued: November 26, 1991 Reissued: April 4, 2011 Amended: March 17, 1992; November 5, 2014; January 22, 2020

OPTIONAL ENGINES G.E. CT58-140-2, T58-GE-10, and T58-GE-402

MAIN GEAR BOX S6135-20600-12, to S6135-20600-15, S6135-20600-18, S6135-20600-19, S6135-20600-23, S6135-20600-39 or later approved dash numbers as per S-61N RFM #10, 19,000 to 22,000 lbs.

S6135-21000-17 or S6135-21000-18 as modified by Croman on FAA 337

OPTIONAL MAIN GEAR BOXES S6135-22000-3 as modified by Croman S6137-23000-13 as modified by Croman

MAIN ROTOR HEAD S6110-20003021 or later approved dash number

MAIN ROTOR BLADES 61170-20201-062 or 61170-20201-067 per AD 85-18-05 R2

OPTIONAL MAIN ROTOR BLADES Blades for S-61N approved to 22,000 lbs. per AD 85-18-05 R2 or Carson Helicopters Composite Main Rotor Blades (P/N 163-101-1)

TAIL ROTOR BLADES S6115-30001 Series 61170-30201 Series or if the optional Carson Helicopters Composite Main Rotor Blades (P/N 163-101-1) are installed; the ribbed pocket tail rotor blades (P/N S6117-30101-043 and subsequent) or Carson composite tail rotor blades (P/N 428- 600-1 and subsequent; STC SR04122NY) must also be installed.

#4 TAIL ROTOR DRIVE SHAFT S6135-64129-4

INTERMEDIATE GEAR BOX S6135-66100-1

The Croman cargo sling has been found to be compatible with the McAllister engineering en terprises model ME612 weighing system as shown on drawing 612-00000. This weighing system is optional to the Croman cargo sling.

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FAA FORM 8110-2 (5/14) PAGE 4 OF 4 PAGES