MD 500 / Hughes 369 series buyer's guide:
what the records reveal

The U.S. fleet at a glance

The FAA registry lists 654 MD 500 / Hughes 369 series aircraft, built between 1966 and 2025. The largest concentrations are registered in DE (74), CA (52), TX (48). A large, active fleet works in a buyer's favor: parts supply, mechanic familiarity and comparable sale prices are all easier to establish than on a rare type.

Where this fleet reports maintenance difficulties

FAA Service Difficulty Reports are filed by mechanics and operators when a component fails or malfunctions in service. Across the MD 500 / Hughes 369 series fleet, 354 reports have been filed against this type since 1995 — most airframes have zero reports on file, with a mean of 0.5 per airframe. The systems mechanics report most on this type:

• JASC 73 — Engine Fuel & Control : 32 reports fleet-wide
• JASC 72 — Engine : 31 reports fleet-wide
• JASC 78 — Exhaust : 28 reports fleet-wide
• JASC 62 — Main Rotor : 26 reports fleet-wide
• JASC 77 — Engine Indicating : 25 reports fleet-wide

Filing is voluntary, so these figures understate reality — but the RELATIVE weight of each system is exactly where an experienced buyer points the pre-buy inspection first. Reconciliation note: 797 further reports filed under these registrations were excluded because the aircraft model declared in the report shows they belong to previous holders of the same N-numbers.

The accident record, in numbers

The NTSB database holds 90 accident or incident records serial-matched to MD 500 / Hughes 369 series airframes in this fleet since 2008 — about 13.8 per 100 currently registered aircraft, of which 11 involved fatal injuries (most recent record: 2026). A further 8 records filed under the same N-numbers belong to different airframes (reused registrations) and are excluded.

Method: the denominator is the fleet currently on the FAA registry. Airframes destroyed and later deregistered leave that denominator, so this ratio understates lifetime accident history — read it as a fleet-profile indicator, not an accident rate. Fleet totals also reflect how the type is flown (training and commercial work versus private use), not just the machine itself.

Fleet-level counts tell you about the TYPE; what matters for your purchase is whether the specific airframe you are considering appears in that database — and U.S. registrations get reused, so a serial-number check matters. That per-aircraft lookup is exactly what a TailGuard report does.

Airworthiness directives to know about

1 airworthiness directive published since 1994 in our Federal Register database and matched to this type is currently open, including 1 recurring directive that must be re-complied with at set intervals. The full list of directives applicable to an older airframe is longer — build it at drs.faa.gov. The most recent in our database:

• AD 94-18-08 recurring · effective 1994-09-27 — This amendment supersedes an existing airworthiness directive (AD), applicable to McDonnell Douglas Helicopter Company and Hughes Helicopters, Inc. Model 369, 369A (OH-6A), 369D, E, F, FF, H, HE, HS, and HM series helicopters, that requires daily preflight checks and 100 hours time-in-service (TIS) inspections for tail rotor blade abrasion strip (abrasion strip) debonding until abrasion strip rivets (rivets) are installed. This amendment also supersedes a Priority Letter AD that currently requires installation of rivets, corrects tail rotor blade part numbers listed in the previous AD, and ret

Superseded directives are excluded from these counts. Directives apply by type — no database can tell you whether a given airframe complied. Only its logbooks can, and that is the single most important paperwork check of your pre-buy.

Ownership turnover

Comparing monthly FAA registry snapshots from Aug 2023 to Jun 2026, 139 of the 654 observed MD 500 / Hughes 369 series airframes — 21.3% — changed registrant at least once. This includes registrant-name changes that are not market sales — such as a transfer to an owner's LLC or trust — and newly delivered aircraft registered to their first buyer within the window. A recent ownership change is not a red flag by itself, but a rapid succession of owners deserves a direct question to the seller, and the registration timeline of the specific aircraft is worth reading before you negotiate.

Before you buy a MD 500 / Hughes 369 series

A records-driven starting checklist for this type — derived from the figures above, to hand to your mechanic:

1. Inspect the engine fuel & control closely — it is among the most-reported systems for this type in FAA Service Difficulty Reports (32 reports fleet-wide).
2. Inspect the engine closely — it is among the most-reported systems for this type in FAA Service Difficulty Reports (31 reports fleet-wide).
3. Inspect the exhaust closely — it is among the most-reported systems for this type in FAA Service Difficulty Reports (28 reports fleet-wide).
4. Verify in the logbooks that the 1 recurring airworthiness directive matched to this type is signed off at the required intervals.
5. Confirm engine and airframe times against the logbooks and the most recent annual inspection.
6. Have a licensed A&P/IA perform a physical pre-purchase inspection — no records check replaces it.