FAA-listed STC holder

Croman Corporation STCs

The Jun 30, 2026 FAA DRS snapshot lists 27 selected supplemental type certificates with status Current under Croman Corporation. The records span 7 public aircraft directories and 7 modification categories. This is a research directory, not a claim that any specific kit or service is currently offered.

listed Current at snapshot

aircraft directories

modification categories

Jun 9, 2025

latest recorded revision

Modification mix

Other aircraft modifications11 Cabin and interiors6 Fuel systems3 Aircraft structures2 Avionics2 Cargo and special mission2 Landing gear and brakes1

Aircraft represented

Sikorsky Aircraft S-61N89 STCs Sikorsky Aircraft S-61L51 STCs Sikorsky Aircraft S-61A26 STCs Sikorsky Aircraft S-61NM22 STCs Croman SH-3H13 STCs Sikorsky Aircraft S-61R8 STCs Carson Helicopters SH-3H8 STCs

Recently revised records

Showing the 27 most recently revised records. Category directories provide the complete paginated discovery path.

27 displayed records.

Search every indexed record for this holder. The table below contains the recently revised records shown on this page.

Croman Corporation supplemental type certificates, aircraft applicability, source status and dates
STC and modification	Aircraft / model / TC	Source status and dates	Holder and authority
SR01517SE Fabrication and installation of an internal fire retardant tank. Fuel systems View record	Croman SH-3HTC R00004SE	Current at cited snapshot Revised Jun 9, 2025 Application: Mar 12, 2003	FAA holder: Croman Corporation FAA authority record
SR00218IB Installation of the Cockpit Door. Aircraft structures View record	Sikorsky Aircraft S-61LTC 1H15 Sikorsky Aircraft S-61NTC 1H15	Current at cited snapshot Revised Oct 7, 2024 Application: Apr 19, 2024	FAA holder: Croman Corporation FAA authority record
SR00220IB Installation of Replacement Avionics Shelves. Avionics View record	Sikorsky Aircraft S-61LTC 1H15 Sikorsky Aircraft S-61NTC 1H15	Current at cited snapshot Revised Oct 7, 2024 Application: Apr 19, 2024	FAA holder: Croman Corporation FAA authority record
SR00283SE Removal of a 50 inch section from the forward fuselage between stations 110 and 160 and reinstallation of forward cabin with associated fabricated parts. Cabin and interiors View record	Sikorsky Aircraft S-61LTC 1H15 Sikorsky Aircraft S-61NTC 1H15	Current at cited snapshot Revised Mar 21, 2024 Application: Sep 15, 1995	FAA holder: Croman Corporation FAA authority record
SR00427SE Fabrication and installation of a Helipro Model H9661N01-01, -03, -05, -07, -51, -53, -55, -57, -59 or -61 logging utility system. Other aircraft modifications View record	Sikorsky Aircraft S-61NTC 1H15	Current at cited snapshot Revised Mar 21, 2024 Application: Jan 26, 1997	FAA holder: Croman Corporation FAA authority record
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. Aircraft structures View record	Sikorsky Aircraft S-61ATC H2EA Sikorsky Aircraft S-61LTC 1H15 Sikorsky Aircraft S-61NTC 1H15 Sikorsky Aircraft S-61NMTC 1H15	Current at cited snapshot Revised Mar 21, 2024 Application: Dec 12, 1998	FAA holder: Croman Corporation FAA authority record
SR01264SE Fabrication of Helipro replacement windshields. Other aircraft modifications View record	Sikorsky Aircraft S-61LTC 1H15 Sikorsky Aircraft S-61NTC 1H15 Sikorsky Aircraft S-61NMTC 1H15	Current at cited snapshot Revised Mar 21, 2024 Application: Jun 9, 2003	FAA holder: Croman Corporation FAA authority record
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. Avionics View record	Sikorsky Aircraft S-61LTC 1H15 Sikorsky Aircraft S-61NTC 1H15 Sikorsky Aircraft S-61NMTC 1H15 Sikorsky Aircraft S-61RTC 1H15	Current at cited snapshot Revised Apr 6, 2023 Application: Oct 4, 2006	FAA holder: Croman Corporation FAA authority record
SR09236RC Installation of a Modular Harness. Other aircraft modifications View record	Sikorsky Aircraft S-61LTC 1H15 Sikorsky Aircraft S-61NTC 1H15	Current at cited snapshot Revised Apr 6, 2023 Application: Nov 10, 1998	FAA holder: Croman Corporation FAA authority record
SR02692SE Installation of T58-GE-402 engines. Other aircraft modifications View record	Sikorsky Aircraft S-61ATC H2EA	Current at cited snapshot Revised Jun 24, 2020 Application: Feb 24, 2020	FAA holder: Croman Corporation FAA authority record
SR01051DE Installation of Croman Corporation Electric Heater. Other aircraft modifications View record	Croman SH-3HTC R00004SE Sikorsky Aircraft S-61ATC H2EA	Current at cited snapshot Revised Jun 5, 2020 Application: Apr 21, 2020	FAA holder: Croman Corporation FAA authority record
SH5654NM Installation of Croman 10,000 lbs. cargo sling system and associated fuselage mounting hardpoints. Cargo and special mission View record	Sikorsky Aircraft S-61ATC H2EA	Current at cited snapshot Revised Jan 22, 2020 Application: Mar 26, 1991	FAA holder: Croman Corporation FAA authority record
SR02601SE Fabrication and installation of an internal fire retardant tank. Fuel systems View record	Sikorsky Aircraft S-61ATC H2EA	Current at cited snapshot Revised Jun 18, 2018 Application: Apr 18, 2017	FAA holder: Croman Corporation FAA authority record
SR02583SE Installation of a 9 passenger seat configuration for side-facing seats. Cabin and interiors View record	Sikorsky Aircraft S-61NTC 1H15	Current at cited snapshot Revised Jan 16, 2018 Application: Sep 1, 2017	FAA holder: Croman Corporation FAA authority record
SR02077SE Installation of the Observer Seat CRCS100-01. Cabin and interiors View record	Croman SH-3HTC R00004SE Sikorsky Aircraft S-61ATC H2EA	Current at cited snapshot Revised May 3, 2017 Application: Jun 9, 2010	FAA holder: Croman Corporation FAA authority record
SR01755SE Installation of the Main Rotor Head Modification. Other aircraft modifications View record	Carson Helicopters SH-3HTC R00014LA Croman SH-3HTC R00004SE	Current at cited snapshot Revised Apr 21, 2016 Application: Oct 8, 2004	FAA holder: Croman Corporation FAA authority record
SR01427SE Installation of S-61L fixed main landing gear. Landing gear and brakes View record	Carson Helicopters SH-3HTC R00014LA Croman SH-3HTC R00004SE Sikorsky Aircraft S-61ATC H2EA	Current at cited snapshot Revised Apr 5, 2016 Application: May 22, 2003	FAA holder: Croman Corporation FAA authority record
SR02267SE Fabrication of replacement transmission fittings. Other aircraft modifications View record	Croman SH-3HTC R00004SE Sikorsky Aircraft S-61ATC H2EA Sikorsky Aircraft S-61LTC 1H15 Sikorsky Aircraft S-61NTC 1H15 Sikorsky Aircraft S-61NMTC 1H15	Current at cited snapshot Revised Dec 1, 2015 Application: Sep 4, 2012	FAA holder: Croman Corporation FAA authority record
SH5125NM Installation of Croman 10,000 lbs. cargo sling system and associated fuselage mounting hardpoints. Cargo and special mission View record	Croman SH-3HTC R00004SE Sikorsky Aircraft S-61NTC 1H15	Current at cited snapshot Revised Mar 18, 2014 Application: Jun 4, 1987	FAA holder: Croman Corporation FAA authority record
SR01426SE Fabrication and installation of components for a left seat pilot-in-command operation. Cabin and interiors View record	Croman SH-3HTC R00004SE Sikorsky Aircraft S-61ATC H2EA Sikorsky Aircraft S-61LTC 1H15 Sikorsky Aircraft S-61NTC 1H15 Sikorsky Aircraft S-61NMTC 1H15	Current at cited snapshot Revised Sep 10, 2013 Application: May 22, 2003	FAA holder: Croman Corporation FAA authority record
SR00319SE Modification of Part Number S6137-23009-6 main transmission rear cover per. Other aircraft modifications View record	Sikorsky Aircraft S-61ATC H2EA Sikorsky Aircraft S-61LTC 1H15 Sikorsky Aircraft S-61NTC 1H15 Sikorsky Aircraft S-61NMTC 1H15	Current at cited snapshot Revised Jun 7, 2013 Application: Oct 2, 1996	FAA holder: Croman Corporation FAA authority record
SR01534SE Installation of the transmission input modification to the main gear box. Other aircraft modifications View record	Sikorsky Aircraft S-61LTC 1H15 Sikorsky Aircraft S-61NTC 1H15 Sikorsky Aircraft S-61NMTC 1H15	Current at cited snapshot Revised Jun 3, 2013 Application: Sep 13, 2004	FAA holder: Croman Corporation FAA authority record
SR02190SE Installation of steel transmission fitting fabricated in accordance with Croman Drawing S-6120-62113-CRO41, Revision D, dated January 8, 1982, or later Federal Aviation Administration (FAA) approved revision; installed in accordance with Croman Installation Instructions S-6120-62113-CRO41-Inst, Revision IR, dated August 10, 2011, or later FAA- approved revision. Other aircraft modifications View record	Sikorsky Aircraft S-61NTC 1H15	Current at cited snapshot Revised Sep 7, 2011 Application: Mar 17, 2011	FAA holder: Croman Corporation FAA authority record
SR02087SE Limit the standard passenger seating configuration to 19 or less on the Sikorsky S-61N rotorcraft. Cabin and interiors View record	Sikorsky Aircraft S-61NTC 1H15	Current at cited snapshot Revised Sep 2, 2010 Application: Apr 8, 2010	FAA holder: Croman Corporation FAA authority record
SR01981SE Fabrication and installation of an internal fire retardant tank. Fuel systems View record	Sikorsky Aircraft S-61ATC H2EA	Current at cited snapshot Revised Feb 17, 2010 Application: Nov 20, 2007	FAA holder: Croman Corporation FAA authority record
SR02037SE Fabrication and installation of improved pressure refueling shut-off system. Other aircraft modifications View record	Croman SH-3HTC R00004SE	Current at cited snapshot Revised Dec 4, 2009 Application: Jan 22, 2009	FAA holder: Croman Corporation FAA authority record
SR01627SE Limit the standard passenger seating configuration to 9 or less. Cabin and interiors View record	Sikorsky Aircraft S-61NTC 1H15	Current at cited snapshot Revised Jan 6, 2006 Application: Nov 29, 2005	FAA holder: Croman Corporation FAA authority record