# N618CK: Sikorsky S-61NM

- Status: Valid registration
- Airframe: [Sikorsky S-61NM](https://openairdocs.org/model/sikorsky-s-61nm) (registry code 8142105, 28 seats)
- Engine: [GE CT58-140-2](https://openairdocs.org/engine/ge-ct58-140-2) (registry code 30129)
- Data sheets: [TCDS 1H15](https://openairdocs.org/tcds/1H15) (Sikorsky Aircraft), [TCDS 1E3](https://openairdocs.org/tcds/1E3) (General Electric Company) (OpenAirDocs)
- Serial number: 61454
- Type: Rotorcraft
- Engine type: Turbo-shaft
- Airworthiness: Standard, transport
- Airworthiness date: June 3, 2013
- Certificate issued: April 19, 2013
- Expires: April 30, 2029
- Mode S code: A80CB2
- Registered owner: [Croman Corp](https://openairdocs.org/faa-owner/CROMAN%20CORP)
- Location: [White City, OR](https://openairdocs.org/faa-place/OR/White%20City)
- Owner type: Corporation
- Owner's area on the map: 42.6128° N, 122.9275° W: Placed by OpenAirDocs at the center of ZIP code 97503, within about 5 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=618CK
- Page: https://openairdocs.org/aircraft/N618CK

From the FAA registry file of October 24, 2026. ADs below are matched by the registry's airframe and engine model codes. They may apply; each AD's applicability can narrow it by serial number, part number or installed equipment. This is not a compliance determination.

## ADs that may apply (OpenAirDocs): 57 in force

### Matched by airframe (Sikorsky S-61NM)

- [AD 2026-15-17](https://openairdocs.org/ad/2026-15-17): Main Rotor Gearbox · Glacier Helicopter CH-3E, S-61A, S-61D and 12 more. Effective Sep 10, 2026
- [AD 2026-11-05](https://openairdocs.org/ad/2026-11-05): Rotorcraft flight control; Rotorcraft servo system · Carson Helicopters S-61L, SH-3H, CH-3E and 11 more. Effective Jul 9, 2026
- [AD 2023-11-07](https://openairdocs.org/ad/2023-11-07): Ground Proximity System · Airbus Helicopters 47, 206, 210 and 237 more. Effective Jun 22, 2023
- [AD 2021-05-19](https://openairdocs.org/ad/2021-05-19): Tail Rotor Control System · Sikorsky S-61A, S-61D, S-61E and 5 more. Effective May 7, 2021
- [AD 2013-06-51](https://openairdocs.org/ad/2013-06-51): Equipment/Furnishings · Agusta A109, A109A, A109A II and 43 more. Effective Jul 15, 2013
- [AD 2013-05-17](https://openairdocs.org/ad/2013-05-17): Aircraft Fuel Filter/Strainer · Sikorsky S-61A, S-61D, S-61E and 5 more. Effective Apr 26, 2013
- [AD 2007-01-05](https://openairdocs.org/ad/2007-01-05): Main gearbox input left and right freewheel unit (IFWU) assembly · Sikorsky S-61L, S-61N, S-61NM and 1 more. Effective Feb 14, 2007
- [AD 2004-15-22](https://openairdocs.org/ad/2004-15-22): Bearing chip detector · Sikorsky S-61L, S-61N, S-61NM and 1 more. Effective Sep 7, 2004
- [AD 2002-20-05](https://openairdocs.org/ad/2002-20-05): Rescue hoists · Agusta A109, A109A, A109A II and 31 more. Effective Nov 7, 2002
- [AD 2000-13-06](https://openairdocs.org/ad/2000-13-06): Web Fittings · Sikorsky S-61A, S-61D, S-61E and 5 more. Effective Jul 18, 2000
- [AD 98-26-02](https://openairdocs.org/ad/98-26-02): Shaft · Sikorsky S-61A, S-61D, S-61E and 5 more. Effective Jan 20, 1999
- [AD 97-19-06](https://openairdocs.org/ad/97-19-06): Blade Trailing Edge Pocket Assemblies · Sikorsky S-61A, S-61D, S-61E and 5 more. Effective Oct 6, 1997
- [AD 91-12-01](https://openairdocs.org/ad/91-12-01): Sleeve & Spindle Assemblies · Sikorsky S-61A, S-61D, S-61E and 5 more. Effective Jul 8, 1991
- [AD 90-01-04](https://openairdocs.org/ad/90-01-04): Main Rotor Hub Upper Plate · Sikorsky S-61A, S-61D, S-61E and 5 more. Effective Feb 5, 1990
- [AD 89-04-01 R3](https://openairdocs.org/ad/89-04-01-R3): Truss Tube Assemblies · Sikorsky S-61N and S-61NM. Effective Feb 5, 1990
- [AD 89-07-09](https://openairdocs.org/ad/89-07-09): Main Rotor Gearbox · Sikorsky S-61A, S-61D, S-61E and 5 more. Effective Apr 20, 1989
- [AD 85-18-05 R2](https://openairdocs.org/ad/85-18-05-R2): Main Rotor Blades · Sikorsky S-61A, S-61L, S-61N and 3 more. Effective Feb 8, 1989
- [AD 87-15-11](https://openairdocs.org/ad/87-15-11): Gearbox Brackets · Sikorsky S-61A, S-61L, S-61N and 3 more. Effective Aug 10, 1987
- [AD 86-23-08](https://openairdocs.org/ad/86-23-08): Main Rotor Hub Lower Plate · Sikorsky S-61A, S-61D, S-61E and 5 more. Effective Apr 21, 1987
- [AD 84-25-01](https://openairdocs.org/ad/84-25-01): Main Gearbox Inspection · Sikorsky S-61A, S-61D, S-61E and 5 more. Effective Jan 19, 1985
- [AD 84-01-51](https://openairdocs.org/ad/84-01-51): Rotary Wing Head Shaft Nut · Sikorsky S-61A, S-61D, S-61E and 5 more. Effective Mar 27, 1984
- [AD 74-20-07 R5](https://openairdocs.org/ad/74-20-07-R5): Main Rotor Blades · Sikorsky S-61A, S-61L, S-61N and 3 more. Effective Dec 30, 1983
- [AD 78-20-05 R4](https://openairdocs.org/ad/78-20-05-R4): Main Rotor Spindles · Sikorsky S-61A, S-61D, S-61E and 5 more. Effective May 25, 1983
- [AD 80-17-07](https://openairdocs.org/ad/80-17-07): Horizontal Hinge Pins · Sikorsky S-61A, S-61D, S-61E and 5 more. Effective Aug 15, 1980
- [AD 74-20-09](https://openairdocs.org/ad/74-20-09): Main Rotor Blades · Sikorsky S-61A, S-61L, S-61N and 2 more. Effective Feb 25, 1977
- [AD 76-06-01](https://openairdocs.org/ad/76-06-01): Hydraulic Pumps · Erickson Air-Crane S-64A, S-64E, S-64F and 12 more. Effective Mar 24, 1976
- [AD 76-03-02](https://openairdocs.org/ad/76-03-02): Fractures in Barrel Nuts · Sikorsky S-61L, S-61N, S-61NM and 1 more. Effective Feb 17, 1976
- [AD 75-26-10](https://openairdocs.org/ad/75-26-10): Component Replacement · Sikorsky S-61L, S-61N and S-61NM. Effective Jan 2, 1976
- [AD 68-19-07](https://openairdocs.org/ad/68-19-07): Rotor Blade Spindles · Sikorsky S-61A, S-61D, S-61E and 5 more. Effective Dec 23, 1975
- [AD 75-17-33](https://openairdocs.org/ad/75-17-33): Baggage Doors · Sikorsky S-61L, S-61N and S-61NM. Effective Oct 3, 1975
- [AD 75-12-01](https://openairdocs.org/ad/75-12-01): Main Rotor Blades · Sikorsky S-61L, S-61N, S-61NM and 1 more. Effective Jun 12, 1975
- [AD 74-25-05](https://openairdocs.org/ad/74-25-05): Main Rotor Blades · Sikorsky S-61L, S-61N, S-61NM and 1 more. Effective Nov 6, 1974
- [AD 74-25-06](https://openairdocs.org/ad/74-25-06): Takeoff Gross Weight Limitation · Sikorsky S-61L, S-61N and S-61NM. Effective Oct 16, 1974
- [AD 72-03-01](https://openairdocs.org/ad/72-03-01): Alum. Forgings Flight Control System · Sikorsky S-61A, S-61D, S-61E and 5 more. Effective Feb 1, 1972
- [AD 71-21-03](https://openairdocs.org/ad/71-21-03): Link in Servo Valve Input Linkage · Sikorsky S-61A, S-61D, S-61E and 5 more. Effective Oct 7, 1971
- [AD 71-05-01](https://openairdocs.org/ad/71-05-01): Main Landing Gear Axle · Sikorsky S-61A, S-61D, S-61E and 5 more. Effective Feb 23, 1971
- [AD 70-09-03](https://openairdocs.org/ad/70-09-03): Tail Gear Box Pitch Beams · Sikorsky S-61A, S-61D, S-61E and 5 more. Effective May 8, 1970
- [AD 67-29-05](https://openairdocs.org/ad/67-29-05): Rotary Wing Hub Hinge Pins · Sikorsky S-61A, S-61D, S-61E and 5 more. Effective Oct 30, 1967
- [AD 66-19-04](https://openairdocs.org/ad/66-19-04): Tail Rotor Blades · Sikorsky S-58A, S-58B, S-58BT and 20 more. Effective Aug 14, 1966
- [AD 65-08-02](https://openairdocs.org/ad/65-08-02): Main Rotor Blades · Orlando Helicopter Airways HRS-1/CH-19, HRS-3/H-19B, S-55 and 11 more. Effective Apr 9, 1965
- [AD 85-15-05](https://openairdocs.org/ad/85-15-05): Main Rotor Horn Eyebolt/Eyebolt Assembly · Sikorsky S-61L, S-61N and S-61NM
- [AD 79-12-10](https://openairdocs.org/ad/79-12-10): Tail Rotor Blades · Sikorsky S-61A, S-61D, S-61E and 5 more
- [AD 78-12-05](https://openairdocs.org/ad/78-12-05): Fixed S-61L Type Landing Gears · Sikorsky S-61A, S-61L, S-61N and 1 more

### Matched by engine (GE CT58-140-2)

- [AD 2015-20-09](https://openairdocs.org/ad/2015-20-09): Life-limited rotating parts · General Electric CT58-100-2, CT58-110-1, CT58-110-2 and 2 more. Effective Nov 18, 2015
- [AD 2005-04-10](https://openairdocs.org/ad/2005-04-10): Stage 1 compressor disks · General Electric T58-GE-100, T58-GE-10, T58-GE-5 and 2 more. Effective Mar 29, 2005
- [AD 2004-04-06](https://openairdocs.org/ad/2004-04-06): Fuel flow divider assemblies · General Electric T58-GE-402, T58-GE-100, T58-GE-10 and 8 more. Effective Mar 9, 2004
- [AD 2001-12-07](https://openairdocs.org/ad/2001-12-07): Fuel Flow Divider Assemblies · General Electric T58-GE-402, T58-GE-100, T58-GE-10 and 4 more. Effective Jul 2, 2001
- [AD 97-21-08](https://openairdocs.org/ad/97-21-08): Stage 1 forward cooling plate · General Electric T58-GE-100, T58-GE-10, T58-GE-8F and 6 more. Effective Dec 19, 1997
- [AD 97-19-17](https://openairdocs.org/ad/97-19-17): Critical rotating parts · General Electric T58-GE-100, T58-GE-10, T58-GE-5 and 6 more. Effective Nov 28, 1997
- [AD 94-07-05](https://openairdocs.org/ad/94-07-05): Turbine Wheels · General Electric CT58-110-1, CT58-110-2, CT58-140-1 and 1 more. Effective Apr 19, 1994
- [AD 81-18-03](https://openairdocs.org/ad/81-18-03): Fuel Controls · General Electric CT58-100-2, CT58-110-1, CT58-110-2 and 2 more. Effective Sep 17, 1981
- [AD 81-02-02](https://openairdocs.org/ad/81-02-02): Stage One Turbine Wheels · General Electric CT58-100-2, CT58-110-1, CT58-110-2 and 2 more. Effective Feb 2, 1981
- [AD 78-26-08](https://openairdocs.org/ad/78-26-08): Lube Pump Drive Shaft · General Electric CT58-100-2, CT58-110-1, CT58-110-2 and 2 more. Effective Dec 19, 1978
- [AD 67-01-02](https://openairdocs.org/ad/67-01-02): Rotor Discs · General Electric CT58-100-1, T58-GE-5, T58-GE-1 and 5 more. Effective Aug 24, 1976
- [AD 76-13-02](https://openairdocs.org/ad/76-13-02): Oil Cooler-To-Fuel Filter Hose · General Electric CT58-100-2, CT58-110-1, CT58-110-2 and 2 more. Effective Jul 6, 1976
- [AD 74-25-01](https://openairdocs.org/ad/74-25-01): Fuel System Hose · General Electric CT58-140-1 and CT58-140-2. Effective Dec 10, 1974
- [AD 69-17-03](https://openairdocs.org/ad/69-17-03): First and Second Stage Turbine Rotor Discs · General Electric T58-GE-5, T58-GE-1, CT58-100-2 and 4 more. Effective Aug 27, 1969

### Historical (superseded or no longer in force)

- [AD 2021-23-13](https://openairdocs.org/ad/2021-23-13) (historical): Ground Proximity System · Airbus Helicopters K-225, K-190A, K-240 and 237 more. Effective Dec 9, 2021
- [AD 2015-20-12](https://openairdocs.org/ad/2015-20-12) (historical): Main Rotor Gearbox · Carson Helicopters SH-3H, SH-3H, CH-3E and 13 more. Effective Nov 24, 2015
- [AD 97-10-04](https://openairdocs.org/ad/97-10-04) (historical): Blade Trailing Edge Pocket Assemblies · Sikorsky S-61A, S-61D, S-61E and 5 more
- [AD 2008-22-16](https://openairdocs.org/ad/2008-22-16) (historical): Repetitive heavy lift (RHL) · General Electric CT58-100-2, CT58-110-1, CT58-110-2 and 2 more. Effective Dec 1, 2008
- [AD 2001-18-06](https://openairdocs.org/ad/2001-18-06) (historical): Engine Life-limited Rotating Parts · General Electric CT58-100-2, CT58-110-1, CT58-110-2 and 2 more. Effective Oct 18, 2001
- [AD 69-23-02](https://openairdocs.org/ad/69-23-02) (historical): Stage 2 Compressor Rotor Disc Shafts · General Electric CT58-100-2, CT58-110-1, CT58-110-2 and 2 more. Effective Oct 15, 1970
- [AD 79-23-04](https://openairdocs.org/ad/79-23-04) (historical): Turboshaft Engines Rotating Components · General Electric CT58-100-2, CT58-110-1, CT58-110-2 and 2 more

## Information bulletins (advisory)

None matched.

## NTSB investigations

None matched to N618CK.

## FAA accident and incident reports

None matched to N618CK.

## Service difficulty reports

None filed for this aircraft. Matched to this aircraft by N-number and event date, checked against the reported serial number, make and model.

## STCs that may be installed (OpenAirDocs) (29)

Approved for this aircraft's airframe or engine model, in force first, then newest. The registry doesn't record which STCs an aircraft has; its records do.

### Approved for the airframe (Sikorsky S-61NM)

- [STC SR00814SE](https://openairdocs.org/stc/SR00814SE): Fabrication of reinforcement kit - aft fuselage station 493. For model S61A, applies to S/N 61094. For model S61NM, applies to S/N 66454. Croman Corporation
- [STC SR01264SE](https://openairdocs.org/stc/SR01264SE): Fabrication of Helipro replacement windshields. Croman Corporation
- [STC SH3319NM](https://openairdocs.org/stc/SH3319NM): Installation of Precise Flight Pulselite Control Unit in the Landing /Taxi Recognition Visual Control Light system,. Precise Flight Inc
- [STC SR02279AK](https://openairdocs.org/stc/SR02279AK): Installation of dual Rockwell Collins FDS 2000 flight displays, dual AHS 3000 attitude and heading reference systems, dual Garmin GNS 530 navigation systems and supporting avionics equipment. Croman Corporation
- [STC SR04501CH](https://openairdocs.org/stc/SR04501CH): The certification of various configurations of cockpit side windows. CHI Aviation
- [STC SR01127SE](https://openairdocs.org/stc/SR01127SE): Modification of main rotor blade part number 61170-20201 in accordance with Master Drawing List RR 9633-08, Revision A, dated September 17, 2002, or later FAA approved revision. Retirement life for the modified main rotor blade, part number RR-61170-20201 is 21,200 total time in service. Park Technologies, LLC
- [STC SR04483CH](https://openairdocs.org/stc/SR04483CH): Installation of NASI NREM18M Air Conditioning Module. National Aircraft Service Inc. (NASI)
- [STC SR00925DE](https://openairdocs.org/stc/SR00925DE): Installation of Garmin GTX 335/335R and GTX345/345R transponders to provide ADS-B Out and In functionality. Peregrine
- [STC SR04401NY](https://openairdocs.org/stc/SR04401NY): Increase of Out of Ground Effect (OGE) Hover Performance. Carson Helicopters Inc
- [STC SR04122NY](https://openairdocs.org/stc/SR04122NY): The Installation of Carson Helicopters, Inc. Composite Tail Rotor Blade and Pitch Sleeve, part number 428-600-1,. Carson Helicopters Inc
- [STC SR02487NY](https://openairdocs.org/stc/SR02487NY): Increased Category A Performance for the Sikorsky S-61L, S-61N and S-61NM Helicopters. Carson Helicopters, Inc
- [STC SR02267SE](https://openairdocs.org/stc/SR02267SE): Fabrication of replacement transmission fittings. Croman Corporation
- [STC SR02394AK](https://openairdocs.org/stc/SR02394AK): Replacement of existing landing and/or hover light bulbs with Light Emitting Diode (LED) lighting system. Seaplanes North LLC
- [STC SR03310CH](https://openairdocs.org/stc/SR03310CH): Installation of NASI Air Conditioning Module. National Aircraft Service Inc
- [STC SR02501LA](https://openairdocs.org/stc/SR02501LA): Removal of the Bendix 30E20-11-C 300 Amp Starter Generator and installation of the AMETEK Aerospace MG105A-1, 300 Amp Starter Generator. Carson Helicopters, Inc
- [STC SR01426SE](https://openairdocs.org/stc/SR01426SE): Fabrication and installation of components for a left seat pilot-in-command operation. Croman Corporation
- [STC SR00319SE](https://openairdocs.org/stc/SR00319SE): Modification of Part Number S6137-23009-6 main transmission rear cover per. Croman Corporation
- [STC SR01534SE](https://openairdocs.org/stc/SR01534SE): Installation of the transmission input modification to the main gear box. Croman Corporation
- [STC SA2693NM](https://openairdocs.org/stc/SA2693NM): Installation of Electronics International digital volt/amp gauges and accessories. Electronics International Inc
- [STC SR01585NY](https://openairdocs.org/stc/SR01585NY): Installation of Carson Helicopters, Inc. composite main rotor blades, P/N 163-101-1. Carson Helicopters Inc
- [STC SR02382NY](https://openairdocs.org/stc/SR02382NY): Increase of Out of Ground Effect (OGE) and In Ground Effect (IGE) Hover Performance for the Sikorsky S-61L, S-61N and S-61NM Helicopters. Carson Helicopters Inc
- [STC SA02279AK](https://openairdocs.org/stc/SA02279AK): Installation of dual Rockwell Collins FDS 2000 flight displays, dual AHS 3000 attitude and heading reference systems, dual Garmin GNS 530 navigation systems and supporting avionics equipment . Acrohelipro Global Services USA Inc
- [STC SR09448RC](https://openairdocs.org/stc/SR09448RC): Installation of Concorde Battery Corporation Model RG-3BOE/44 Valve Regulated Sealed Lead Acid Battery. Carson Helicopters Inc
- [STC SR02057NY](https://openairdocs.org/stc/SR02057NY): Upgrade of the S6135-20600 series main gearbox by replacing input free-wheeling units in accordance with Carson drawing. IFWU INSTL Carson S-61 No. CHI-R-001, no revision, dated 12-15-04 and Carson Installation Instructions Report CHI-R-INSTALL, no revision, dated 12-14-04. Carson Helicopters, Inc
- [STC SR02373AT](https://openairdocs.org/stc/SR02373AT): Manufacture of a titanium transmission support fitting assembly. Clayton International Inc
- [STC SA1626NM PAGE 2](https://openairdocs.org/stc/SA1626NM%20PAGE%202): Installation of Electronics Int'l Digital EGT/CHT Instruments and accessories. (201 Series). Electronics International
- [STC SH853NE](https://openairdocs.org/stc/SH853NE): Replacement of life-limited components. Rotair Industries, Inc
- [STC SA4302NM](https://openairdocs.org/stc/SA4302NM): Installation of Electronics Int'l digital automatic engine analyzer. Electronics International
- [STC SH413NW](https://openairdocs.org/stc/SH413NW): Installation of an electronic weighing system. Measurement Systems Intl

## Related

- Other Sikorsky S-61NM aircraft: https://openairdocs.org/model/sikorsky-s-61nm/aircraft.md
- The GE CT58-140-2 engine: https://openairdocs.org/engine/ge-ct58-140-2.md

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