| Tail Number / N-Number | N640 |
| Manufacturer | GRUMMAN/MCKINNON ENTERPRISES |
| Model | G21G |
| Year Built | 1944 |
| Manufacturer's Serial Number | 1201 |
| Aircraft Type | Fixed wing multi engine |
| Category | Amphibian |
| Builder Certification | Type Certificated |
| Number of Seats | 10 seats |
| Weight Class | CLASS 2 (12,500 - 19,999 pounds gross take off weight) |
| Engine Manufacturer | P&W |
| Engine Model | PT6A SER |
| Engine Type | Turbo-prop |
| Number of Engines | 2 engines |
| Horsepower per Engine | 750 hp (560 kW) |
| Total Horsepower | 1,500 hp (1,119 kW) |
| Type of Registrant | Corporation |
| Owner Name | TEUFEL HOLLY FARMS INC |
| Street | 160 SW MILLER RD |
| City | PORTLAND |
| State | OR |
| Zip Code | 97225-6130 |
| Region | Northwest Mountain |
| County | Multnomah County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 2005-10-10 |
| Certificate Issue Date | 2012-02-15 |
| Last Action Date | 2020-09-26 |
| Expiration Date | 2028-02-29 |
| Status | Valid Registration |
| Mode S Code | 52062472 |
| Mode S Code Hex | A8653A |
Deregistered Aircraft 1 of 2. This aircraft was previously assigned the N-number N640.
| Tail Number / N-Number | N640 |
| Manufacturer | GRUMMAN |
| Model | G-21A |
| Manufacturer's Serial Number | B-123 |
| Aircraft Type | Fixed wing multi engine |
| Category | Amphibian |
| Builder Certification | Type Certificated |
| Number of Seats | 8 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Number of Engines | 2 engines |
| Average Cruising Speed | 150 miles per hour |
| Type of Registrant | Corporation |
| Owner Name | TEUFEL NURSERY INC |
| Street | 12345 NW BARNES RD |
| City | PORTLAND |
| State | OR |
| Zip Code | 97229-5907 |
| County | Multnomah County |
| Country | US |
| Certificate Issue Date | 1998-04-15 |
| Last Action Date | 2001-06-19 |
| Last Status | The Triennial Aircraft Registration form was mailed and has not been returned by the Post Office |
| Cancellation Date | 2001-07-06 |
Deregistered Aircraft 2 of 2. This aircraft was previously assigned the N-number N640.
| Tail Number / N-Number | N640 |
| Manufacturer | DEHAVILLAND |
| Model | 4B (MAIL) |
| Manufacturer's Serial Number | 100 |
| Aircraft Type | Fixed wing single engine |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 3 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Number of Engines | 1 engine |
| Type of Registrant | Corporation |
| Owner Name | CADDO COMPANY INC |
| Street | 1040 NORTH LAS PALMAS AVE |
| City | HOLLYWOOD |
| State | CA |
| Zip Code | 90069 |
| Region | Western-Pacific |
| County | Multnomah County |
| Certificate Issue Date | 1929-03-05 |
| Last Status | Valid Registration |
| Cancellation Date | 1934-07-20 |