# N641LB: 1998 Mcdonnell Douglas Helicopter 600N

- Status: Valid registration
- Airframe: [Mcdonnell Douglas Helicopter 600N](https://openairdocs.org/model/mcdonnell-douglas-helicopter-600n) (registry code 3027377, 6 seats)
- Engine: [Allison 250 SER 400HP](https://openairdocs.org/engine/allison-250-ser-400hp) (registry code 03013)
- Data sheets: [TCDS H3WE](https://openairdocs.org/tcds/H3WE) (MD Helicopters LLC) (OpenAirDocs)
- Serial number: RN041
- Year built: 1998
- Type: Rotorcraft
- Engine type: Turbo-shaft
- Airworthiness: Standard, normal
- Airworthiness date: August 28, 1998
- Certificate issued: July 24, 2024
- Expires: July 31, 2031
- Mode S code: A869EE
- Registered owner: [Gr (Uk) Inc Trustee](https://openairdocs.org/faa-owner/GR%20(UK)%20INC%20TRUSTEE)
- Location: [Wilmington, DE](https://openairdocs.org/faa-place/DE/Wilmington)
- Owner type: Corporation
- Owner's area on the map: 39.7452° N, 75.5937° W: Placed by OpenAirDocs at the center of ZIP code 19805, within about a mile (OpenAirDocs). The owner's mailing address, not where the aircraft is based
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=641LB
- Page: https://openairdocs.org/aircraft/N641LB

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): 26 in force

### Matched by airframe (Mcdonnell Douglas Helicopter 600N)

- [AD 2026-19-01](https://openairdocs.org/ad/2026-19-01): Rotorcraft flight control · MD Helicopters 369, 369 (Army YOH-6A), 369A and 11 more. Effective Oct 20, 2026
- [AD 2025-17-11](https://openairdocs.org/ad/2025-17-11): tail rotor control system · MD Helicopters 369 (Army YOH-6A), 369A (Army OH-6A), 369D and 9 more. Effective Oct 10, 2025
- [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 2021-22-11](https://openairdocs.org/ad/2021-22-11): Tail Rotor Control System · MD Helicopters 369D, 369E, 369F and 7 more. Effective Jan 10, 2022
- [AD 2020-18-20](https://openairdocs.org/ad/2020-18-20): Main Rotor Blade · MD Helicopters 369A, 369D, 369E and 7 more. Effective Oct 28, 2020
- [AD 2020-11-07](https://openairdocs.org/ad/2020-11-07): Main Rotor System · MD Helicopters 369D, 369E, 369FF and 6 more. Effective Jun 30, 2020
- [AD 2020-06-11](https://openairdocs.org/ad/2020-06-11): Main Rotor Control · MD Helicopters 600N. Effective Apr 28, 2020
- [AD 2019-05-04](https://openairdocs.org/ad/2019-05-04): Main Rotor Blade · MD Helicopters 369A, 369D, 369E and 7 more. Effective Apr 17, 2019
- [AD 2016-04-15](https://openairdocs.org/ad/2016-04-15): Main Rotor Blades · MD Helicopters 369A, 369D, 369E and 6 more. Effective Mar 31, 2016
- [AD 2016-01-19](https://openairdocs.org/ad/2016-01-19): Rotorcraft Tail Boom · MD Helicopters 500N and 600N. Effective Feb 25, 2016
- [AD 2013-03-03](https://openairdocs.org/ad/2013-03-03): Tail rotor blades · MD Helicopters 500N, 600N and MD900. Effective Mar 15, 2013
- [AD 2008-22-52](https://openairdocs.org/ad/2008-22-52): Yaw Stability Augmentation System · MD Helicopters 500N and 600N. Effective Dec 15, 2008
- [AD 2008-20-05](https://openairdocs.org/ad/2008-20-05): Fuselage · MD Helicopters 600N. Effective Oct 27, 2008
- [AD 2007-05-51](https://openairdocs.org/ad/2007-05-51): Lateral mixer output link assembly (mixer link) · MD Helicopters 600N. Effective May 7, 2007
- [AD 2005-21-02](https://openairdocs.org/ad/2005-21-02): Main rotor blade (blade) · Main rotor blades P/N 500P2300-501/503/505 (Helicopter Technology STC SR01050LA or 2 others). Effective Nov 1, 2005
- [AD 2004-22-12](https://openairdocs.org/ad/2004-22-12): Fuselage Station 75 Control Support Bracket Assembly · MD Helicopters 600N. Effective Dec 3, 2004
- [AD 2004-20-08](https://openairdocs.org/ad/2004-20-08): Forward and center thruster control cable assembly connector (connector) · MD Helicopters 500N and 600N. Effective Oct 21, 2004
- [AD 2003-16-11](https://openairdocs.org/ad/2003-16-11): Main rotor drive shaft assembly (drive shaft) · MD Helicopters 600N. Effective Sep 30, 2003
- [AD 2000-08-22](https://openairdocs.org/ad/2000-08-22): Turbine Outlet Temperature (TOT) Indicating System · MD Helicopters 369D, 369E, 500N and 1 more. Effective May 22, 2000
- [AD 2000-04-21](https://openairdocs.org/ad/2000-04-21): Fuel Hose · MD Helicopters 600N. Effective Apr 5, 2000
- [AD 99-25-08](https://openairdocs.org/ad/99-25-08): Thruster Control Cable Conduit Cap · MD Helicopters 500N and 600N. Effective Mar 1, 2000
- [AD 99-20-12](https://openairdocs.org/ad/99-20-12): Bracket P/N 369F5190-1 · MD Helicopters 369D, 369E, 369FF and 2 more. Effective Nov 4, 1999
- [AD 99-17-18](https://openairdocs.org/ad/99-17-18): Flight Control Components · MD Helicopters 600N. Effective Sep 24, 1999
- [AD 99-08-07](https://openairdocs.org/ad/99-08-07): Engine Control And Warning System · MD Helicopters 369E, 369FF, 500N and 1 more. Effective Apr 21, 1999
- [AD 99-04-12](https://openairdocs.org/ad/99-04-12): Input Shaft Coupling Assembly · MD Helicopters 369D, 369E, 369FF and 3 more. Effective Mar 23, 1999
- [AD 98-15-26](https://openairdocs.org/ad/98-15-26): Main Rotor Blade Cracking Inspection · MD Helicopters 369A, 369D, 369E and 8 more. Effective Aug 3, 1998

### Matched by engine (Allison 250 SER 400HP)

None in force.

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

- [AD 2024-23-06](https://openairdocs.org/ad/2024-23-06) (historical): Rotorcraft Flight Control · MD Helicopters 369, 369A, 369D and 11 more. Effective Dec 24, 2024
- [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 2008-18-52](https://openairdocs.org/ad/2008-18-52) (historical): Prevent loss of yaw control and subsequent loss of control of the helicopter · MD Helicopter 500N, 600N and MD900
- [AD 2008-18-51](https://openairdocs.org/ad/2008-18-51) (historical): Vertical Stabilizer Control System (VSCS) · MD Helicopter 500N, 600N and MD900
- [AD 2008-05-17](https://openairdocs.org/ad/2008-05-17) (historical): Aft fuselage skin · MD Helicopter 600N. Effective Apr 16, 2008
- [AD 2006-08-12](https://openairdocs.org/ad/2006-08-12) (historical): Upper tailboom attachment fittings · MD Helicopter 600N. Effective Apr 27, 2006
- [AD 2001-24-51](https://openairdocs.org/ad/2001-24-51) (historical): Upper Tailboom Attachments, Nutplates and Angles · MD Helicopter 600N. Effective Apr 29, 2002

## Information bulletins (advisory) (3 in force)

- [SAIB AIR-21-19R1](https://openairdocs.org/saib/AIR-21-19R1): AERIAL TOW EQUIPMENT, Side Pull Hook. Issued Nov 29, 2021
- [SAIB SW-12-45](https://openairdocs.org/saib/SW-12-45): Garmin Model 400W/500W Series GPS-WAAS Navigation System. Issued Oct 3, 2012
- [SAIB SW-07-17](https://openairdocs.org/saib/SW-07-17): Lateral mixer output link assembly (mixer link), part number 600N7636. Issued Feb 16, 2007
- [SAIB AIR-21-19](https://openairdocs.org/saib/AIR-21-19) (historical): AERIAL TOW EQUIPMENT, Side Pull Hook. Issued Nov 29, 2021

## NTSB investigations

None matched to N641LB.

## FAA accident and incident reports

None matched to N641LB.

## 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) (71, first 50)

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 (Mcdonnell Douglas Helicopter 600N)

- [STC SA800EA](https://openairdocs.org/stc/SA800EA): Installation of Whelen Anti-Collision, Position, or Anti-Collision/Position Light System, and applicable associated power supplies. Whelen Aerospace Technologies
- [STC SR01050LA](https://openairdocs.org/stc/SR01050LA): Installation of main rotor blades P/N 500P2300-501/503/505. Helicopter Technology Company
- [STC SR00862LA](https://openairdocs.org/stc/SR00862LA): Installation of aft belly utility mount. Airfilm Camera Systems LLC
- [STC SR01078LA](https://openairdocs.org/stc/SR01078LA): Installation of right side dual utility mount, in accordance with FAA Approved Aero Pacific Master Drawing List for Right Side Dual Utility Mount, MDL 6003, dtd 4/15/00 or later FAA approved revision. Airfilm Camera Systems LLC
- [STC SH2735NM](https://openairdocs.org/stc/SH2735NM): Installation of pneumatic door actuators. Dart Aerospace USA Inc
- [STC SR02808LA](https://openairdocs.org/stc/SR02808LA): Installation of MD500 Side Pull Kit. Aerocraft Incorporated
- [STC SH5206NM](https://openairdocs.org/stc/SH5206NM): Installation of two underfuselage jacking hard points. Dart Aerospace USA Inc
- [STC SR09178RC](https://openairdocs.org/stc/SR09178RC): Installation of a vapor-cycle air conditioning system with a belt driven compressor. MD Helicopters LLC
- [STC SR00314AT](https://openairdocs.org/stc/SR00314AT): Installation of engine firewall in Hughes 369 model helicopter. Thoroughbred Aviation Maintenance Inc
- [STC SR00450AT](https://openairdocs.org/stc/SR00450AT): Installation of a seat pan inspection panel. Thoroughbred Aviation Maintenance Inc
- [STC SR01839AT](https://openairdocs.org/stc/SR01839AT): Installation of cyclic friction levers. Thoroughbred Aviation Maintenance Inc
- [STC SR02693LA](https://openairdocs.org/stc/SR02693LA): Installation of a redundant system for the primary Cargo Hook system when conducting Human External Cargo (HEC) external loads operations. Onboard Systems International LLC
- [STC SH4908NM](https://openairdocs.org/stc/SH4908NM): Fabrication of Onboard Systems Model 200-034-00, 200-034-01, and 200-034-02 Load Weigh Kits. Onboard Systems International
- [STC SR00525SE](https://openairdocs.org/stc/SR00525SE): Fabrication of Onboard Systems Model 200-231-00 and 200-231-01 Cargo Hook Attach Point Kit and installation of these Cargo Hook Attach Point Kits. Onboard Systems International
- [STC SR00892SE](https://openairdocs.org/stc/SR00892SE): Fabrication of Onboard Systems International Model 200-264-00, 200-264-01, and 200-264-02 Cargo Hook Kits. Onboard Systems International
- [STC SR02001SE](https://openairdocs.org/stc/SR02001SE): Fabrication and installation of Model 72448 locking fuel cover assembly. Timberline Aerospace LLC
- [STC SR02704SE](https://openairdocs.org/stc/SR02704SE): Installation and maintenance of the Sunspot 36 and 46 series lights. AeroLED's Holdings LLC
- [STC SR01343NY](https://openairdocs.org/stc/SR01343NY): Installation of main rotor blade tie down tips. VIH Aerospace Inc
- [STC SR02124SE](https://openairdocs.org/stc/SR02124SE): Installation functionality. of Data Garmin Required: transponders: (1) Garmin GTX Master 345/345R Drawing with List ADS-B (MDL), Out and In 005-00734-A4, functionality;. Garmin International Inc
- [STC SR02728NY](https://openairdocs.org/stc/SR02728NY): Installation of Quick Release Mounting Provisions on the right or left side. Dart Aerospace Limited
- [STC SA615EA](https://openairdocs.org/stc/SA615EA): Installation of a Whelen Anti-Collision Strobe Light System as replacement for originally installed anti-collision lights. Whelen Aerospace Technologies
- [STC SR00359BO](https://openairdocs.org/stc/SR00359BO): Installation of Parmetheus Plus LED PAR36 and PAR46 taxi and landing lights. Whelen Aerospace Technologies
- [STC SH2554NM](https://openairdocs.org/stc/SH2554NM): Installation of Modified front window canopy. The NORDAM Group LLC
- [STC SR02586LA](https://openairdocs.org/stc/SR02586LA): Installation of Freeflight Systems Radar Altimeter RA-4000 or RA-4500 System with optional FTG-410 Tone Generator. Precision Heli-Support, LLC
- [STC SR00864DE](https://openairdocs.org/stc/SR00864DE): Installation of Concorde Battery Corporation 24 Ah VRLA Main Battery. Concorde Battery Corporation
- [STC SR02487AK](https://openairdocs.org/stc/SR02487AK): Installation of L-3 Communications Avionics Systems ESI-500 Standby Instrument System. ADS-B Technologies, LLC
- [STC SR02493SE](https://openairdocs.org/stc/SR02493SE): Installation of a cargo hook. Mechanical Specialties LLC
- [STC SR02470AK](https://openairdocs.org/stc/SR02470AK): Installation of the L-3 Communications NGT -1000/2000/2500 ADS-B System. ADS-B Technologies, LLC
- [STC SR02471AK](https://openairdocs.org/stc/SR02471AK): Installation of the L-3 Communications NGT -9000/9000R ADS-B System. ADS-B Technologies, LLC
- [STC SH4909NM](https://openairdocs.org/stc/SH4909NM): Replace the aft engine compartment heat blanket with a stainless steel firewall. Cascade STC LLC
- [STC SR01635SE](https://openairdocs.org/stc/SR01635SE): Installation of a Supplemental Lighting System. Aviation Specialties Unlimited Inc
- [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 SR00877SE](https://openairdocs.org/stc/SR00877SE): Installation of an engine inlet air filtration system. Aerometals
- [STC SR02310SE](https://openairdocs.org/stc/SR02310SE): Internal structural provision. Brim Aviation
- [STC SR09640RC](https://openairdocs.org/stc/SR09640RC): Installation of Night Vision Goggle (NVG) Compatible Lighting System. Aero Dynamix Inc
- [STC SH1383SO](https://openairdocs.org/stc/SH1383SO): Manufacture of Nightscanner searchlight kit. Bell Helicopter Textron Inc
- [STC SR02255SE](https://openairdocs.org/stc/SR02255SE): Installation of external cargo racks. Brim Aviation
- [STC SH7404SW](https://openairdocs.org/stc/SH7404SW): Installation of a crew door window. Bell Helicopter Textron Inc
- [STC SR01960LA](https://openairdocs.org/stc/SR01960LA): Installation of removable seat pans. Aerometals
- [STC SR00088AT](https://openairdocs.org/stc/SR00088AT): Installation of replacement windshield and windows. Bell Helicopter Textron Inc
- [STC SH207WE](https://openairdocs.org/stc/SH207WE): Installation of range extension fuel tank in cargo area. ROBERTSON FUEL SYSTEMS LLC
- [STC SR02232LA](https://openairdocs.org/stc/SR02232LA): Installation of Garmin Model 400W / 500W Series GPS-WAAS Navigation System. Garmin AT Inc
- [STC SR02011SE](https://openairdocs.org/stc/SR02011SE): Fabrication of Aerometals, LLC, Transmission Oil Seals in accordance with Master Drawing List Aero-MDL-004, dated November 9, 2009, or later FAA-approved revision; and installation in accordance with the corresponding Aerometals Installation Instructions, as referenced on the continuation page. Aerometals
- [STC SR02043SE](https://openairdocs.org/stc/SR02043SE): Fabrication of Aerometals, LLC, Transmission Oil Seals in accordance with Master Drawing List Aero-MDL-004, dated November 9, 2009, or later FAA-approved revision; and installation in accordance with the corresponding Aerometals Installation Instructions, as referenced on the continuation page. Aerometals
- [STC SR02062SE](https://openairdocs.org/stc/SR02062SE): Fabrication of a replacement Aerometals Heater Control Valve Assembly in accordance with Aerometals Master Drawing List No. Aero-MDL-007, Revision A, dated February 17, 2010, or later FAA-approved revision; and installation of this assembly in accordance with Aerometals Installation Instructions No. Aero-Inst-008, Revision NC, dated March 27, 2009, or later FAA-accepted revision. Aerometals
- [STC SR01996SE](https://openairdocs.org/stc/SR01996SE): Fabrication and installation of an oil tank filler cap assembly in the above model rotor craft. Aerometals
- [STC SR02007SE](https://openairdocs.org/stc/SR02007SE): Installation of a Brim Aviation cargo rack in accordance with McClenahan Engineering Master Drawing List and Installation Instructions number DM0916-3, revision IR, dated April 21, 2009, or later FAA-approved revision. This modification must be maintained in accordance with Brim Aviation Instructions for Continued Airworthiness number DM0916-9, revision N/C, dated June 17, 2009, or later FAA-accepted revision. Brim Aviation
- [STC SR02008SE](https://openairdocs.org/stc/SR02008SE): Installation of a Tech Tools 369/500 bubble window in accordance with Brim Aviation Master Drawing List number BR600-010, revision NC, dated June 1, 2009, or later FAA-approved revision. This modification must be maintained in accordance with Brim Aviation Instructions for Continued Airworthiness number BR600-008, revision N/C, dated June 17, 2009, or later FAA-accepted revision. Brim Aviation
- [STC SR02009SE](https://openairdocs.org/stc/SR02009SE): Installation of Brim Aviation tundra pads in accordance with McClenahan Engineering Master Drawing List and Installation Instructions number DM0916-3, revision IR, dated April 21, 2009, or later FAA-approved revision. This modification must be maintained in accordance with Brim Aviation Instructions for Continued Airworthiness number DM0916-8, revision N/C, dated June 17, 2009, or later FAA-accepted revision. Brim Aviation
- [STC SR01924LA](https://openairdocs.org/stc/SR01924LA): Installation of a Platinum Aviation cockpit pedestal slant panel. Integrated Flight Systems

All 71: https://openairdocs.org/aircraft/N641LB/stcs.md

## Related

- Other Mcdonnell Douglas Helicopter 600N aircraft: https://openairdocs.org/model/mcdonnell-douglas-helicopter-600n/aircraft.md
- The Allison 250 SER 400HP engine: https://openairdocs.org/engine/allison-250-ser-400hp.md

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