# N635CK: 1962 Croman SH-3H - Status: Valid registration - Airframe: [Croman SH-3H](https://openairdocs.org/model/croman-sh-3h) (registry code 2490000, 4 seats) - Engine: [GE T58-GE-402](https://openairdocs.org/engine/ge-t58-ge-402) (registry code 30156) - Data sheets: [TCDS R00004SE](https://openairdocs.org/tcds/R00004SE) (Croman Corporation) (OpenAirDocs) - Serial number: 149702 - Year built: 1962 - Type: Rotorcraft - Engine type: Turbo-shaft - Airworthiness: Restricted, agriculture and pest control, forest, other - Airworthiness date: July 8, 2022 - Certificate issued: July 6, 2022 - Expires: July 31, 2029 - Mode S code: A8508B - 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=635CK - Page: https://openairdocs.org/aircraft/N635CK 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): 3 in force ### Matched by airframe (Croman SH-3H) - [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 2021-10-16](https://openairdocs.org/ad/2021-10-16): Engine/Transmission Coupling · Carson Helicopters S-61L, SH-3H, SH-3H and 6 more. Effective Jul 1, 2021 ### Matched by engine (GE T58-GE-402) None in force. ### Historical (superseded or no longer in force) - [AD 2015-20-12](https://openairdocs.org/ad/2015-20-12) (historical): Main Rotor Gearbox · Carson Helicopters SH-3H, SH-3H, CH-3E and 13 more.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 ## Information bulletins (advisory) None matched. ## NTSB investigations None matched to N635CK. ## FAA accident and incident reports None matched to N635CK. ## 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) (13) 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 (Croman SH-3H) - [STC SR01517SE](https://openairdocs.org/stc/SR01517SE): Fabrication and installation of an internal fire retardant tank. Croman Corporation - [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 SR01051DE](https://openairdocs.org/stc/SR01051DE): Installation of Croman Corporation Electric Heater. Croman Corporation - [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 SR02077SE](https://openairdocs.org/stc/SR02077SE): Installation of the Observer Seat CRCS100-01. Croman Corporation - [STC SR01755SE](https://openairdocs.org/stc/SR01755SE): Installation of the Main Rotor Head Modification. Croman Corporation - [STC SR01427SE](https://openairdocs.org/stc/SR01427SE): Installation of S-61L fixed main landing gear. Croman Corporation - [STC SR02267SE](https://openairdocs.org/stc/SR02267SE): Fabrication of replacement transmission fittings. Croman Corporation - [STC SH5125NM](https://openairdocs.org/stc/SH5125NM): Installation of Croman 10,000 lbs. cargo sling system and associated fuselage mounting hardpoints. Croman Corporation - [STC SR01426SE](https://openairdocs.org/stc/SR01426SE): Fabrication and installation of components for a left seat pilot-in-command operation. Croman Corporation - [STC SR02037SE](https://openairdocs.org/stc/SR02037SE): Fabrication and installation of improved pressure refueling shut-off system. Croman Corporation - [STC SR01288SE](https://openairdocs.org/stc/SR01288SE): Fabrication of Ag-Air Systems Model 36000 Auxiliary Hydraulic System. Kawak Aviation Technologies Inc ## Related - Other Croman SH-3H aircraft: https://openairdocs.org/model/croman-sh-3h/aircraft.md - The GE T58-GE-402 engine: https://openairdocs.org/engine/ge-t58-ge-402.md --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.