| Tail Number / N-Number | N21NC |
| Manufacturer | PIPER |
| Model | PA-23-250 |
| Year Built | 1976 |
| Manufacturer's Serial Number | 27-7654012 |
| Aircraft Type | Fixed wing multi engine |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 6 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Engine Manufacturer | LYCOMING |
| Engine Model | TI0-540 SER |
| Engine Type | Turbo-prop |
| Number of Engines | 2 engines |
| Horsepower per Engine | 310 hp (231 kW) |
| Total Horsepower | 620 hp (463 kW) |
| Average Cruising Speed | 150 miles per hour |
| Type of Registrant | LLC |
| Owner Name | BEARING TREE LAND SURVEYING LLC |
| Street | 7100 BROADWAY EXT |
| City | OKLAHOMA CITY |
| State | OK |
| Zip Code | 73116-9008 |
| Region | Southwestern |
| County | Oklahoma County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Restricted |
| Airworthiness Date | 1994-01-13 |
| Certificate Issue Date | 2018-11-28 |
| Last Action Date | 2021-10-20 |
| Expiration Date | 2028-11-30 |
| Status | Valid Registration |
| Mode S Code | 50334130 |
| Mode S Code Hex | A1B858 |
Deregistered Aircraft 1 of 1. This aircraft was previously assigned the N-number N21NC.
| Tail Number / N-Number | N21NC |
| Manufacturer | CESSNA |
| Model | T337D |
| Year Built | 1968 |
| Manufacturer's Serial Number | 337-1022 |
| Aircraft Type | Fixed wing multi engine |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 6 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Engine Manufacturer | CONT MOTOR |
| Engine Model | IO-360 SER |
| Engine Type | Reciprocating |
| Number of Engines | 2 engines |
| Horsepower per Engine | 300 hp (224 kW) |
| Total Horsepower | 600 hp (448 kW) |
| Average Cruising Speed | 142 miles per hour |
| Type of Registrant | Individual |
| Owner Name | SALE REPORTED |
| Street | 802 HURT RD |
| City | BLOOMBURG |
| State | TX |
| Zip Code | 75556-2620 |
| County | Oklahoma County |
| Country | US |
| Airworthiness Classification | Standard |
| Airworthiness Date | 1969-01-02 |
| Last Action Date | 2009-12-17 |
| Last Status | Sale reported |
| Cancellation Date | 2010-02-11 |