# N6440Z: 1961 Piper PA-25, registration cancelled 2013-04-29

- Type: Cancelled registration (FAA registry, deregistered aircraft)
- Cancelled: April 29, 2013
- Status when cancelled: Registration expired, pending cancellation
- Airframe: [Piper PA-25](https://openairdocs.org/model/piper-pa-25) (registry code 7102502)
- Engine: [Lycoming 0-540 series](https://openairdocs.org/engine/lycoming-0-540-series) (registry code 41532)
- Data sheets: [TCDS 2A8](https://openairdocs.org/tcds/2A8), [TCDS E-295](https://openairdocs.org/tcds/E-295) (OpenAirDocs)
- Serial number: 25-599
- Year built: 1961
- Type of aircraft: Fixed wing single engine
- Engine type: Reciprocating
- Airworthiness: Restricted, agriculture and pest control
- Airworthiness date: July 12, 1961
- Certificate issued: April 5, 1994
- Last registry action: May 5, 1997
- Mode S code: A87687
- Owner when cancelled: [Simpson'S Air Service Inc](https://openairdocs.org/faa-owner/SIMPSON'S%20AIR%20SERVICE%20INC)
- Location: [Dover, DE](https://openairdocs.org/faa-place/DE/Dover)
- Owner type: Corporation
- Owner's area on the map: 39.1815° N, 75.4736° W: Placed by OpenAirDocs at the center of ZIP code 19901, within about 5 miles (OpenAirDocs). The owner's mailing address, not where the aircraft was based
- The mark today: https://openairdocs.org/aircraft/N6440Z
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=6440Z
- Page: https://openairdocs.org/deregistered/N6440Z-2013-04-29

From the FAA registry file of November 3, 2026, cancelled registrations. Owners' street addresses are left out. The Mode S code belongs to the N-number, not the airframe.

ADs and bulletins for the Piper PA-25: https://openairdocs.org/model/piper-pa-25.md

## NTSB investigations (3)

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

- [NTSB CHI94FA263](https://openairdocs.org/ntsb/CHI94FA263), Aug 2, 1994: Piper PA-25 (N6440Z), Decatur, NE, destroyed, 2 fatal. Probable cause: LOSS OF ENGINE POWER FOR AN UNDETERMINED REASON, AND FAILURE OF THE PILOT TO MAINTAIN ADEQUATE AIRSPEED, WHICH RESULTED IN AN INADVERTENT STALL.
- [NTSB FTW72DQG08](https://openairdocs.org/ntsb/FTW72DQG08), Jul 26, 1971: Piper PA-25 (N6440Z), Tulia, TX, substantial damage
- [NTSB FTW67D0552](https://openairdocs.org/ntsb/FTW67D0552), Apr 5, 1967: Piper PA-25 (N6440Z), Spearman, TX, substantial damage

## FAA accident and incident reports (2)

From the FAA Accident/Incident Data System. Reports are matched to registry aircraft by N-number and event date, checked against the reported make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

- [Accident 19940802024389A](https://openairdocs.org/incident/19940802024389A), Aug 2, 1994: Piper PA25 (N6440Z), Decatur, NE, Destroyed, 2 fatal. Stalled on climbout. Impacted and burned. No power on impact. No anomalies marijuana herbicide and drugs in pilot.
- [Incident 19820806046479I](https://openairdocs.org/incident/19820806046479I), Aug 6, 1982: Piper PA25235 (N6440Z), Hoxie, KS, Minor damage. Ground fog formed while spraying. Elected to land in farm field. Soft ground collapsed gear.

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