# N503D: 1991 Air Tractor AT-503A, registration cancelled 2005-05-12

- Type: Cancelled registration (FAA registry, deregistered aircraft)
- Cancelled: May 12, 2005
- Status when cancelled: Triennial form not returned
- Airframe: [Air Tractor AT-503A](https://openairdocs.org/model/air-tractor-at-503a) (registry code 0390304)
- Engine: [Pratt & Whitney PT6A series](https://openairdocs.org/engine/pratt-whitney-pt6a-series) (registry code 52032)
- Data sheets: [TCDS A17SW](https://openairdocs.org/tcds/A17SW) (OpenAirDocs)
- Serial number: 503A-0067
- Year built: 1991
- Type of aircraft: Fixed wing single engine
- Engine type: Turbo-prop
- Airworthiness: Experimental, showing compliance
- Airworthiness date: April 3, 1991
- Certificate issued: May 9, 2002
- Last registry action: April 15, 2008
- Mode S code: A64560
- Owner when cancelled: [Pontiac Flying Service Inc](https://openairdocs.org/faa-owner/PONTIAC%20FLYING%20SERVICE%20INC)
- Location: [Pontiac, IL](https://openairdocs.org/faa-place/IL/Pontiac)
- Owner type: Corporation
- Owner's area on the map: 40.8833° N, 88.6259° W: Placed by OpenAirDocs at the center of ZIP code 61764, within about 7 miles (OpenAirDocs). The owner's mailing address, not where the aircraft was based
- The mark today: https://openairdocs.org/aircraft/N503D
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=503D
- Page: https://openairdocs.org/deregistered/N503D-2005-05-12

From the FAA registry file of October 29, 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 Air Tractor AT-503A: https://openairdocs.org/model/air-tractor-at-503a.md

## NTSB investigations (1)

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 CHI03LA118](https://openairdocs.org/ntsb/CHI03LA118), May 5, 2003: Air Tractor AT-503A (N503D), Pontiac, IL, substantial damage, 2 fatal. Probable cause: The pilot's failure to maintain adequate airspeed which resulted in an inadvertent stall/spin. A factor associated with the accident was the low altitude maneuver.

## FAA accident and incident reports (1)

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 20030505008159A](https://openairdocs.org/incident/20030505008159A), May 5, 2003: Airtrc AT503A (N503D), Pontiac, IL, Destroyed, 2 fatal. (-23) On may 05, 2003, at approximately 1414 central daylight time, an air tractor AT-503A, N503D, collided with terrain following a loss of control while…

## Other aircraft with N503D

- [Cancelled 2017-11-14](https://openairdocs.org/deregistered/N503D-2017-11-14): ELY Dennis R HM-290, S/N 001. Second renewal notice. Owner: [Ely Dennis R](https://openairdocs.org/faa-owner/ELY%20DENNIS%20R), [Sanford, FL](https://openairdocs.org/faa-place/FL/Sanford)

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.