Type Record · As of May 3, 2026
MD HELICOPTERS INC 600N
Rotorcraft · ROLLS-ROYC 250-C47M
Registered
11
Year Range
2000–2010
NTSB Events
3
Airworthiness Directives
49
01 / Distribution
Where the fleet lives and was built
Counts of currently-registered MD HELICOPTERS INC 600N aircraft by US state and decade of manufacture, sourced from the FAA Aircraft Registry.
By State (top 10)
- FL 27.3% 3
- TX 18.2% 2
- DE 18.2% 2
- AZ 9.1% 1
- CA 9.1% 1
- OK 9.1% 1
- OR 9.1% 1
By Decade of Manufacture
- 2000s 81.8% 9
- 2010s 9.1% 1
- Unknown 9.1% 1
02 / NTSB Records
Events involving MD HELICOPTERS INC 600N aircraft
3 event(s) on file. Showing the most recent 3.
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Aug 15, 2025
N600MWStorrington, Other Foreign
NTSB Docket → -
Nov 29, 2023
N745MBSterling City, Texas Fatal
NTSB Docket → -
Nov 2, 2008
N300FXGallatin, Tennessee Fatal
NTSB Docket →
03 / Airworthiness Directives
FAA directives applicable to MD HELICOPTERS INC 600N
49 directive(s) on file. Showing the most recent 25 · 24 more in the Federal Register.
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Nov 18, 2025
Airworthiness Directives; MD Helicopters, LLC Helicopters
The FAA proposes to supersede Airworthiness Directive (AD) 2024-23-06, which applies to certain MD Helicopters, LLC (MDHI) Model 369, 369A, 369D, 369E, 369F, 369FF, 369H, 369HE, 369HM, 369HS, 500N, and 600N helicopters. AD 2024-23-06 requires repetitively inspecting the torque tube assembly and roller bearings, and de…
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Sep 5, 2025
Airworthiness Directives; MD Helicopters, LLC
The FAA is adopting a new airworthiness directive (AD) for certain MD Helicopters, LLC, Model 369 (Army YOH-6A), 369A (Army OH- 6A), 369D, 369E, 369F, 369FF, 369H, 369HE, 369HM, 369HS, 500N, and 600N helicopters. This AD was prompted by multiple reports of cracked tail rotor (T/R) pedal support brackets. This AD requi…
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Nov 19, 2024
Airworthiness Directives; MD Helicopters, LLC, Helicopters
The FAA is adopting a new airworthiness directive (AD) for certain MD Helicopters, LLC (MDHI), Model 369, 369A, 369D, 369E, 369F, 369FF, 369H, 369HE, 369HM, 369HS, 500N, and 600N helicopters. This AD was prompted by a report of a seized and damaged roller bearing in the pilot interconnecting cyclic torque tube (torque…
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Aug 28, 2024
Airworthiness Directives; MD Helicopters, LLC, Helicopters
The FAA proposes to adopt a new airworthiness directive (AD) for certain MD Helicopters, LLC, Model 369 (Army YOH-6A), 369A (Army OH-6A), 369D, 369E, 369F, 369FF, 369H, 369HE, 369HM, 369HS, 500N, and 600N helicopters. This proposed AD was prompted by multiple reports of cracked tail rotor (T/R) pedal support brackets.…
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Aug 8, 2024
Airworthiness Directives; MD Helicopters, LLC, Helicopters
The FAA proposes to adopt a new airworthiness directive (AD) for certain MD Helicopters, LLC (MDHI), Model 369, 369A, 369D, 369E, 369F, 369FF, 369H, 369HE, 369HM, 369HS, 500N, and 600N helicopters. This proposed AD was prompted by a report of a seized and damaged roller bearing in the pilot interconnecting cyclic torq…
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Dec 6, 2021
Airworthiness Directives; MD Helicopters Inc. (MDHI) Helicopters
The FAA is adopting a new airworthiness directive (AD) for certain MD Helicopters Inc. (MDHI), Model 369D, 369E, 369F, 369FF, 369H, 369HE, 369HM, 369HS, 500N, and 600N helicopters. This AD was prompted by a report of a spiral crack in the pilot-to-copilot tail rotor torque tube (torque tube). This AD requires a one-ti…
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Aug 13, 2021
Airworthiness Directives; MD Helicopters Inc. (MDHI) Helicopters
The FAA proposes to adopt a new airworthiness directive (AD) for MD Helicopters Inc. (MDHI), Model 369D, 369E, 369F, 369FF, 369H, 369HE, 369HM, 369HS, 500N, and 600N helicopters. This proposed AD was prompted by a report of a spiral crack in the pilot-to-copilot tail rotor torque tube (torque tube). This proposed AD w…
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Sep 23, 2020
Airworthiness Directives; MD Helicopters Inc. (MDHI), Helicopters
The FAA is adopting a new airworthiness directive (AD) for certain MD Helicopters Inc. (MDHI) Model 369A, 369D, 369E, 369FF, 369H, 369HE, 369HM, 369HS, 500N, and 600N helicopters. This AD was prompted by reports of abrasion strips departing the main rotor (MR) blade in- flight. This AD requires tap inspecting each MR…
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May 26, 2020
Airworthiness Directives; MD Helicopter Inc., Helicopters
The FAA is adopting a new airworthiness directive (AD) for MD Helicopters Inc., (MDHI) Model 369D, 369E, 369FF, 369H, 369HE, 369HM, 369HS, 500N, and 600N helicopters. This AD was prompted by a report of non-conforming main rotor (M/R) hub lead-lag bolts (bolts). This AD requires removing certain bolts from service. Th…
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May 14, 2020
Airworthiness Directives; MD Helicopters Inc. (MDHI), Helicopters
The FAA proposes to adopt a new airworthiness directive (AD) for certain MD Helicopters Inc. (MDHI), Model 369A, 369D, 369E, 369FF, 369H, 369HE, 369HM, 369HS, 500N, and 600N helicopters. This proposed AD would require tap inspecting each main rotor (MR) blade leading edge abrasion strip and is prompted by reports of a…
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Mar 24, 2020
Airworthiness Directives; MD Helicopters Inc. Helicopters
The FAA is adopting a new airworthiness directive (AD) for MD Helicopters Inc. (MDHI) Model 600N helicopters. This AD requires establishing a life limit for the main rotor (M/R) blade upper control collective/longitudinal link assembly (link assembly). This AD was prompted by the discovery that the life limit was omit…
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Feb 7, 2020
Airworthiness Directives; MD Helicopters Inc., Helicopters
The FAA proposes to adopt a new airworthiness directive (AD) for MD Helicopters Inc., (MDHI) Model 369D, 369E, 369FF, 369H, 369HE, 369HM, 369HS, 500N, and 600N helicopters. This proposed AD was prompted by a report of non-conforming main rotor (M/R) hub lead-lag bolts (bolts). This proposed AD would require removing c…
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Mar 13, 2019
Airworthiness Directives; MD Helicopters, Inc. (MDHI), Helicopters
We are adopting a new airworthiness directive (AD) for MDHI Model 369A, 369D, 369E, 369FF, 369H, 369HE, 369HM, 369HS, 500N, and 600N helicopters. This AD requires inspecting each main rotor blade (MRB) for a crack. This AD was prompted by reports of cracked MRBs. The actions of this AD are intended to address an unsaf…
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Nov 26, 2018
Airworthiness Directives; MD Helicopters Inc. (MDHI) Helicopters
We propose to adopt a new airworthiness directive (AD) for MDHI Model 369A, 369D, 369E, 369FF, 369H, 369HE, 369HM, 369HS, 500N, and 600N helicopters. This proposed AD would require inspecting each main rotor blade (MRB) for a crack. This proposed AD is prompted by reports of cracked MRBs. The actions of this proposed…
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Sep 10, 2018
Airworthiness Directives; MD Helicopters Inc. Helicopters
We propose to adopt a new airworthiness directive (AD) for MD Helicopters Inc. (MDHI) Model 600N helicopters. This proposed AD would require establishing a life limit for the main rotor (M/R) blade upper control collective/longitudinal link assembly (link assembly). This proposed AD is prompted by the discovery that t…
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Feb 25, 2016
Airworthiness Directives; MD Helicopters Inc., Helicopters
We are adopting a new airworthiness directive (AD) for MD Helicopters, Inc. (MDHI), Model 369A, 369D, 369E, 369FF, 369HE, 369HM, 369HS, 500N, and 600N helicopters with a certain part-numbered main rotor blade attach pin (pin) installed. This AD requires ensuring the life limit of the pin as listed in the Airworthiness…
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Jan 21, 2016
Airworthiness Directives; MD Helicopters Inc.
We are adopting a new airworthiness directive (AD) for MD Helicopters Inc. (MDHI) Model 500N and 600N helicopters with certain rotating cone assemblies installed. This AD requires establishing a life limit of 10,000 hours time-in-service (TIS) on these rotating cone assemblies. This AD was prompted by the determinatio…
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Sep 2, 2015
Airworthiness Directives; MD Helicopters Inc., Helicopters
We propose to adopt a new airworthiness directive (AD) for MD Helicopters Inc. (MDHI) Model 369A, 369D, 369E, 369FF, 369HE, 369HM, 369HS, 500N, and 600N helicopters with a certain part-numbered main rotor blade attach pin (pin) installed. This proposed AD would require ensuring the life limit of the pin as listed in t…
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Jun 9, 2015
Airworthiness Directives; MD Helicopters Inc.
We propose to adopt a new airworthiness directive (AD) for MD Helicopters Inc. (MDHI) Model 500N and 600N helicopters with certain rotating cone assemblies installed. This proposed AD would require establishing a life limit of 10,000 hours time-in-service (TIS) on these rotating cone assemblies. This proposed AD is pr…
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Feb 8, 2013
Airworthiness Directives; MD Helicopters, Inc., Helicopters
We are adopting a new airworthiness directive (AD) for MD Helicopters, Inc. (MDHI) Model 500N, 600N and MD900 helicopters to require determining the cure date for each NOTAR fan blade tension- torsion strap (T-T strap), establishing a calendar-time retirement life for certain T-T straps, reducing the retirement life o…
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Jul 19, 2012
Airworthiness Directives; MD Helicopters, Inc. (MDHI) Helicopters
We propose to adopt a new airworthiness directive (AD) for MDHI Model 500N, 600N, and MD900 helicopters to require determining the cure date for each NOTAR fan blade tension-torsion strap (T-T strap), establishing a calendar-time retirement life for certain T-T straps, reducing the retirement life of certain T-T strap…
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Jan 14, 2011
Airworthiness Directives; MD Helicopters, Inc. (MDHI) Model MD900 Helicopters
This document proposes superseding an existing airworthiness directive (AD) for MDHI Model MD900 helicopters. That AD currently requires turning on both Vertical Stabilizer Control System (VSCS) switches and turning off the autopilot (AP/SAS) switch; pulling certain AP/SAS circuit breakers; installing a placard near t…
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Dec 2, 2008
Airworthiness Directives; MD Helicopters, Inc. Model MD900 Helicopters
This document supersedes AD 2008-18-52 and publishes in the Federal Register an amendment adopting Emergency Airworthiness Directive (AD) 2008-22-53 which was sent previously to all known U.S. owners and operators of MD Helicopters, Inc. (MDHI) Model MD900 helicopters by individual letters. This AD requires turning ON…
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Nov 28, 2008
Airworthiness Directives; MD Helicopters, Inc. Model 500N and 600N Helicopters
This document supersedes AD 2008-18-52 and publishes in the Federal Register an amendment adopting Emergency Airworthiness Directive (AD) 2008-22-52 which was sent previously to all known U.S. owners and operators of MD Helicopters, Inc. (MDHI) Model 500N and 600N helicopters by individual letters. This AD requires tu…
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Nov 28, 2008
Airworthiness Directives; MD Helicopters, Inc. Model 600N Helicopters
This document corrects airworthiness directive (AD) 2008-20-05 which was published on October 10, 2008 (73 FR 60102) and applies to MD Helicopters, Inc. (MDHI) Model 600N helicopters. AD 2008-20-05 requires modifying the fuselage aft section, repetitively inspecting the tailboom attachment fittings, installing inspect…
04 / Regulations watching this type
Advisory Circulars and Federal Register activity for MD HELICOPTERS INC 600N
Advisory Circulars
No ACs explicitly mention this type. Showing universal operating-rule ACs that apply to all aircraft.
Recent Federal Register activity
Latest rulemakings touching general operating rules (Part 91) and maintenance rules (Part 43).
- 2026-04-17 Settlement Policy for Small Unmanned Aircraft System (UAS) Cases FR ↗
- 2026-02-10 Normalizing Unmanned Aircraft Systems Beyond Visual Line of Sight Operations; Reopening of Comment Period; Denial of Extension FR ↗
- 2026-02-02 25-Hour Cockpit Voice Recorder (CVR) Requirement, New Aircraft Production FR ↗
- 2026-01-28 Normalizing Unmanned Aircraft Systems Beyond Visual Line of Sight Operations; Reopening of Comment Period FR ↗
- 2026-01-07 Requirements for Interference-Tolerant Radio Altimeter Systems FR ↗
05 / Aircraft of this type
All 11 registered N-numbers
Every tail currently on the FAA registry for this make/model. Click an N-number to query the FAA Aircraft Inquiry; rows flagged ● have NTSB events on file. Tails seeded with full TallyAero pages link directly.
| N-number | St | Year | NTSB | FAA |
|---|---|---|---|---|
| N209EC | AZ | 2007 | · | Look up ↗ |
| N261VS | FL | — | · | Look up ↗ |
| N266VS | FL | 2002 | · | Look up ↗ |
| N300FX | FL | 2000 | ● | Look up ↗ |
| N420GC | CA | 2005 | · | Look up ↗ |
| N600FT | TX | 2008 | · | Look up ↗ |
| N600MW | DE | 2001 | ● | Look up ↗ |
| N600NR | DE | 2008 | · | Look up ↗ |
| N678SK | TX | 2010 | · | Look up ↗ |
| N69VS | OK | 2006 | · | Look up ↗ |
| N745MB | OR | 2002 | ● | Look up ↗ |
Source — FAA Aircraft Registry · click "Look up" to query the live registry record (owner, address, last airworthiness)
05 / Sources & Methodology
Every count traces back to a primary US-government source
- FAA Aircraft Registry →
Refreshed Apr 27, 2026
Available
- NTSB CAROL →
Refreshed Apr 27, 2026
Available
- Federal Register (FAA Airworthiness Directives) →
Refreshed Apr 27, 2026
Available
We render counts and lists as the agency publishes them. Read the methodology →