# Incident 20081215852789I: Cndair CL6002C10, Chicago, IL, December 15, 2008

- Type: FAA incident report (Accident/Incident Data System), as reported
- Date: December 15, 2008, 21:45 local time
- Place: Chicago, IL
- Airport: Chicago O'Hare International
- Damage: Minor damage
- Phase of flight: Landing
- Operating rules: Air carrier (Part 121)
- Operator: MASA
- Location: 41.9808° N, 87.9064° W: From the FAA
- Nearby events: https://openairdocs.org/map.md?lat=41.9808&lon=-87.9064&mi=10
- Aircraft: N511MJ (not matched to a registry record)
- Reported make and model: CNDAIR CL6002C10
- Reported engine: GE CF348C1
- People aboard: 32
- Fatal injuries: 0
- Pilot flight hours: 3,100 total, 570 in this make and model, 150 in the last 90 days
- NTSB investigation: [NTSB CEN09FA094](https://openairdocs.org/ntsb/CEN09FA094) (OpenAirDocs)
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/20081215852789I

## Narrative

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

N511MJ, A CANADAIR CRJ CL-600-2C10 (CRJ700) OPERATING AS MESA AIRLINES FLIGHT 7164 (DBA UNTITED EXPRESS) DEPARTED CHICAGO O'HARE INTN'L AIRPORT (ORD) ON A PASSENGER REVENUE FLIGHT TO INDIANAPOLIS, IN. DURING THE APPROACH FOR LANDING, THE CREW RECEIVED AN UNSAFE GEAR INDICATION FOR THE LMG. UNABLE TO RESOLVE THE PROBLEM, THE CREW DECLARED AN EMERGENCY AND RETURNED TO LAND ON RUNWAY 28 AT ORD. THE AIRCRAFT TOUCHED DOWN ON THE RUNWAY WITH THE LMG STILL RETRACTED AND TRAVELED DOWN THE RUNWAY ON THE REMAINING LANDING GEAR (NOSE, RMG) AND LEFT WING'S LEADING EDGE. THE AIRCRAFT CAME TO REST APPROXIMATELY 15 FEET LEFT OF RUNWAY CENTERLINE APPROXIMATELY ONE QUARTER OF ITS LENGTH. ALL CREW AND PASSENGERS EVACUATED THE AIRCRAFT WITHOUT INJURY. THERE WAS NO POST INCIDENT FIRE. EXAMINATION OF THE BODY FAIRING SEAL COMMON TO THE MLG INBOARD DOOR INDICATED THAT THE MLG DOOR WAS IN CONTACT WITH ITS MATING BODY FAIRING RUBBER SEAL/INTERNAL METALLIC STIFFNER. IMPROPER POSITIONING OF THE MAIN LANDING GEAR DOOR DURING RIGGING IS BELIEVED TO HAVE RESULTED IN EXERTING PRESSURE ON THE SEAL WHICH CAUSED PREMATURE WEAR OF THE RUBBER COVERING THE METALLIC STIFFNER, THUS CAUSING ITS EXPOSURE TO THE MLG DOOR. THIS CONTACT RESTRICTED THE MOVEMENT OF THE MLG DURING ITS EXTENSION.

## 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 CEN09FA094](https://openairdocs.org/ntsb/CEN09FA094), Dec 16, 2008: Bombardier CL-600-2C10 (N511MJ), Chicago, IL, incident, minor damage. Probable cause: The failure of the left landing gear to extend due to improper maintenance when the landing gear door was replaced. Contributing to the incident was the manufacturer's inadequate maintenance manual…

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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