# Incident 19901106055109I: Aerosp ATR42300, San Juan, Puerto Rico, November 6, 1990

- Type: FAA incident report (Accident/Incident Data System), as reported
- Date: November 6, 1990, 15:20 local time
- Place: San Juan, Puerto Rico
- Airport: Luis Munoz Marin International
- Phase of flight: Climb
- Operating rules: Air taxi and commuter (Part 135)
- Operator: TRBA
- Location: 18.4394° N, 66.0021° W: Placed by OpenAirDocs at LUIS MUNOZ MARIN INTL (SJU), within about a mile (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=18.4394&lon=-66.0021&mi=10
- Aircraft: N972NA (not matched to a registry record)
- Reported make and model: AEROSP ATR42300
- People aboard: 44
- Fatal injuries: 0
- Pilot flight hours: 19,813 total, 1,641 in this make and model, 110 in the last 90 days
- NTSB investigation: [NTSB MIA91IA022](https://openairdocs.org/ntsb/MIA91IA022) (OpenAirDocs)
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/19901106055109I

## Narrative

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

PILOT HAD PROBLEM WITH HEADING CONTROL AFTER DEPARTURE. DISENGAGED AUTOPILOT AND AIRCRAFT WENT INTO TURN. RETURNED.

## 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 MIA91IA022](https://openairdocs.org/ntsb/MIA91IA022), Nov 6, 1990: Aerospatiale ATR-42-300 (N972NA), San Juan, PR, incident, no damage. Probable cause: THE IMPROPER USE OF AILERON TRIM AND THE IMPROPER PREPARATION FOR AUTO PILOT DISCONNECT BY THE FLIGHT CREW COMBINED WITH EXCESSIVE FORCES APPLIED BY THE AILERON TRIM SYSTEM RESULTING IN A DEPARTURE…

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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