| Tail Number / N-Number | N400HH |
| Manufacturer | MITSUBISHI |
| Model | MU-300 |
| Manufacturer's Serial Number | A025 S.A. |
| Aircraft Type | Fixed wing multi engine |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 11 seats |
| Weight Class | CLASS 2 (12,500 - 19,999 pounds gross take off weight) |
| Engine Manufacturer | P&W CANADA |
| Engine Model | JT15D-4 |
| Engine Type | Turbo-fan |
| Number of Engines | 2 engines |
| Thrust per Engine | 2,500 pounds-force (11.1 kN) |
| Total Thrust | 5,000 pounds-force (22.2 kN) |
| Type of Registrant | Corporation |
| Owner Name | 400HH INC |
| Street | PO BOX 103 |
| City | OLDWICK |
| State | NJ |
| Zip Code | 08858-0103 |
| Region | Eastern |
| County | Hunterdon County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 1982-11-29 |
| Certificate Issue Date | 2021-01-12 |
| Last Action Date | 2021-01-12 |
| Expiration Date | 2028-01-31 |
| Status | Valid Registration |
| Mode S Code | 51126530 |
| Mode S Code Hex | A4AD58 |
Deregistered Aircraft 1 of 1. This aircraft was previously assigned the N-number N400HH.
| Tail Number / N-Number | N400HH |
| Manufacturer | AEROSPATIALE |
| Model | AS 355 F ECUREUIL |
| Manufacturer's Serial Number | 5088 |
| Aircraft Type | Rotorcraft |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 7 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Number of Engines | 2 engines |
| County | Hunterdon County |
| Last Status | N-Number Assigned – but has not yet been registered |
| Cancellation Date | 1989-09-28 |