# Accident 19910404008912A: Piper PA60601, Philadelphia, PA, April 4, 1991

- Type: FAA accident report (Accident/Incident Data System), as reported
- Date: April 4, 1991, 12:10 local time
- Place: Philadelphia, PA
- Airport: Philadelphia International
- Damage: Destroyed
- Collision: Midair collision, second aircraft
- Phase of flight: Formation Flying
- Operating rules: Air taxi and commuter (Part 135)
- Operator: AHGA
- Location: 39.9996° N, 75.2409° W: From the FAA, an estimate near the named town, within about 3 miles
- Nearby events: https://openairdocs.org/map.md?lat=39.9996&lon=-75.2409&mi=10
- Aircraft: N3645D, a cancelled registration (https://openairdocs.org/deregistered/N3645D-1991-11-20) (OpenAirDocs)
- Registry model: Piper AEROSTAR 601 (registry code 7106010, https://openairdocs.org/model/piper-aerostar-601) (OpenAirDocs)
- Reported make and model: PIPER PA60601
- People aboard: 3
- Fatal injuries: 5
- Pilot flight hours: 1,972 total, 114 in this make and model
- NTSB investigation: [NTSB DCA91MA031](https://openairdocs.org/ntsb/DCA91MA031) (OpenAirDocs)
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/19910404008912A

## Narrative

As the FAA filed it, in capitals; the FAA replaces private details with ^PRIVACY DATA OMITTED^.

WAS STRUCK FROM BELOW BY N78S THAT WAS TRYING TO CHECK NOSE GEAR DOWN. BOTH CRASHED. JUDGEMENT AND SKILL FACTORS.

## Other aircraft in the event

- N78S, Bell 412: [Accident 19910404008911A](https://openairdocs.org/incident/19910404008911A)

## The NTSB's investigation of this event (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 DCA91MA031](https://openairdocs.org/ntsb/DCA91MA031), Apr 4, 1991: Piper Aerostar 601 (N3645D), Merion, PA, destroyed, 7 fatal. Probable cause: THE POOR JUDGEMENT BY THE CAPTAIN OF THE AIRPLANE TO PERMIT THE IN-FLIGHT INSPECTION AFTER HE HAD DETERMINED TO THE BEST OF HIS ABILITY THAT THE NOSE LANDING GEAR WAS FULLY EXTENDED, THE POOR…

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. For accidents, the NTSB's own investigation is the fuller record.

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