Deregistered Aircraft 1 of 2. This aircraft was previously assigned the N-number N3688N.
| Tail Number / N-Number | N3688N |
| Manufacturer | PIPER |
| Model | PA-12 |
| Manufacturer's Serial Number | 12-1938 |
| 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 |
| Average Cruising Speed | 82 miles per hour |
| Type of Registrant | Corporation |
| Owner Name | MODERN AIR SERVICE INC |
| Street | BOX 1135 |
| City | GREELEY |
| State | CO |
| Zip Code | 80631 |
| Region | Northwest Mountain |
| Certificate Issue Date | 1947-06-23 |
| Last Status | Valid Registration |
| Cancellation Date | 1949-05-26 |
| Mode S Code | 51026601 |
| Mode S Code Hex | A42D81 |
Deregistered Aircraft 2 of 2. This aircraft was previously assigned the N-number N3688N.
| Tail Number / N-Number | N3688N |
| Manufacturer | MOONEY |
| Model | M-20G |
| Manufacturer's Serial Number | 680037 |
| Aircraft Type | Fixed wing single engine |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 4 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Number of Engines | 1 engine |
| Average Cruising Speed | 127 miles per hour |
| Last Status | The Triennial Aircraft Registration form was mailed and has not been returned by the Post Office |
| Cancellation Date | 1988-04-06 |
| Mode S Code | 51026601 |
| Mode S Code Hex | A42D81 |