# Incident 19850910049289I: Doug DC931, Chicago, IL, September 10, 1985

- Type: FAA incident report (Accident/Incident Data System), as reported
- Date: September 10, 1985, 17:55 local time
- Place: Chicago, IL
- Airport: Midway
- Phase of flight: Normal Cruise
- Operating rules: Air carrier (Part 121)
- Operator: MIDA
- Location: 41.8500° N, 87.6501° W: Placed by OpenAirDocs: center of Chicago, IL, within about 9 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=41.8500&lon=-87.6501&mi=10
- Aircraft: N933ML, a cancelled registration (https://openairdocs.org/deregistered/N933ML-1993-06-08) (OpenAirDocs)
- Registry model: Douglas DC-9-31 (registry code 3022065, https://openairdocs.org/model/douglas-dc-9-31) (OpenAirDocs)
- Reported make and model: DOUG DC931
- People aboard: 49
- Fatal injuries: 0
- Pilot flight hours: 0 in this make and model, 0 in the last 90 days
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/19850910049289I

## Narrative

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

RUNAWAY TRIM STOPPED BY PULLING CIRCUIT BREAKER DURING CLIMB. RETURNED AND REPLACED SERVO.

## Other reports on N933ML (3)

Matched to the same aircraft by N-number and date.

- [Incident 19910529022919I](https://openairdocs.org/incident/19910529022919I), May 29, 1991: Doug DC931 (N933ML), Kansas City, MO. Encountered clear air turbulence on descent. Three passengers and two flight attendants injured. A seat belt broke.
- [Incident 19900520026029I](https://openairdocs.org/incident/19900520026029I), May 20, 1990: Doug DC931 (N933ML), Pittsburgh, PA. Drop in NR2 engine oil quantity. Diverted and landed. Stud on oil filter pulled out and oil leaked from filter.
- [Incident 19840224012099I](https://openairdocs.org/incident/19840224012099I), Feb 24, 1984: Doug DC931 (N933ML), Chicago, IL. All flight crew reported being lightheaded and nauseous. No cause except that the crew had not eaten for 9 hours.

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.

---
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.