Narrative:

2 1/2 mi on final at gdl. Gear down/flaps 30. Small aircraft came out of nowhere. Captain saw it last second, pulled back on yoke -- too late. Thump heard and felt followed by 'mayday, mayday, mayday,' then lots of spanish. Flight controls ok and so panel ok. Airspeed 140 KTS on ILS. So scanned and determined outboard wing housing on outboard side knocked off. So, reported wing/flaps ok. Go around initiated and on downwind, fly-by coordinated. Fly-by showed no gear/flap/wing malfunctions. Uneventful landing at H plus 03. Deplaning of passenger was uneventful. Callback conversation with reporter revealed the following information: the visibility was good with no ceiling at gdl. The reporting air carrier aircraft had been turned over the tower, but had not gotten through the frequency congestion. Most of the talk was in spanish. The air carrier was fully configured for landing with the checklist complete. Both aircraft were under positive control, the air carrier flying the ILS and the small aircraft making a left turn in to land. Apparently all of the radio chatter in spanish was directed at the small aircraft when the tower controller realized that there was an impending midair collision. The small aircraft was told to go around, and when he did so, he pulled up into the air carrier. The small aircraft hit the air carrier's landing gear and gear door from the left to the right and its propeller chewed up the right outboard flap. The small aircraft's engine had a sudden stoppage and its left outboard wing panel was badly crumpled. The small aircraft lost up elevator authority but was able to land in a plowed field. The pilot, the only occupant, was able to walk out under his own power. The small aircraft was not pointed out to the air carrier. The small aircraft had no transponder, so there was no TCASII warning. It was difficult for the air carrier to establish communication with the tower after the incident as the tower person who had been on duty left the scene immediately. Another controller came on the line to assure the air carrier that there were no gaping holes and that the runway was clear of debris. The air carrier's landing was uneventful. The mexican government has taken full responsibility for the situation and the NTSB has determined this to be an 'incident.'

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Original NASA ASRS Text

Title: AN ACR LGT AND AN ATX SMA HAD A MIDAIR COLLISION IN GOOD VMC. THE SMA WAS DESTROYED WITH MINOR INJURIES. THE LGT WAS DAMAGED WITH NO INJURIES.

Narrative: 2 1/2 MI ON FINAL AT GDL. GEAR DOWN/FLAPS 30. SMA CAME OUT OF NOWHERE. CAPT SAW IT LAST SECOND, PULLED BACK ON YOKE -- TOO LATE. THUMP HEARD AND FELT FOLLOWED BY 'MAYDAY, MAYDAY, MAYDAY,' THEN LOTS OF SPANISH. FLT CTLS OK AND SO PANEL OK. AIRSPD 140 KTS ON ILS. SO SCANNED AND DETERMINED OUTBOARD WING HOUSING ON OUTBOARD SIDE KNOCKED OFF. SO, RPTED WING/FLAPS OK. GAR INITIATED AND ON DOWNWIND, FLY-BY COORDINATED. FLY-BY SHOWED NO GEAR/FLAP/WING MALFUNCTIONS. UNEVENTFUL LNDG AT H PLUS 03. DEPLANING OF PAX WAS UNEVENTFUL. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE VISIBILITY WAS GOOD WITH NO CEILING AT GDL. THE RPTING ACR ACFT HAD BEEN TURNED OVER THE TWR, BUT HAD NOT GOTTEN THROUGH THE FREQ CONGESTION. MOST OF THE TALK WAS IN SPANISH. THE ACR WAS FULLY CONFIGURED FOR LNDG WITH THE CHKLIST COMPLETE. BOTH ACFT WERE UNDER POSITIVE CTL, THE ACR FLYING THE ILS AND THE SMA MAKING A L TURN IN TO LAND. APPARENTLY ALL OF THE RADIO CHATTER IN SPANISH WAS DIRECTED AT THE SMA WHEN THE TWR CTLR REALIZED THAT THERE WAS AN IMPENDING MIDAIR COLLISION. THE SMA WAS TOLD TO GAR, AND WHEN HE DID SO, HE PULLED UP INTO THE ACR. THE SMA HIT THE ACR'S LNDG GEAR AND GEAR DOOR FROM THE L TO THE R AND ITS PROP CHEWED UP THE R OUTBOARD FLAP. THE SMA'S ENG HAD A SUDDEN STOPPAGE AND ITS L OUTBOARD WING PANEL WAS BADLY CRUMPLED. THE SMA LOST UP ELEVATOR AUTHORITY BUT WAS ABLE TO LAND IN A PLOWED FIELD. THE PLT, THE ONLY OCCUPANT, WAS ABLE TO WALK OUT UNDER HIS OWN PWR. THE SMA WAS NOT POINTED OUT TO THE ACR. THE SMA HAD NO XPONDER, SO THERE WAS NO TCASII WARNING. IT WAS DIFFICULT FOR THE ACR TO ESTABLISH COM WITH THE TWR AFTER THE INCIDENT AS THE TWR PERSON WHO HAD BEEN ON DUTY LEFT THE SCENE IMMEDIATELY. ANOTHER CTLR CAME ON THE LINE TO ASSURE THE ACR THAT THERE WERE NO GAPING HOLES AND THAT THE RWY WAS CLR OF DEBRIS. THE ACR'S LNDG WAS UNEVENTFUL. THE MEXICAN GOV HAS TAKEN FULL RESPONSIBILITY FOR THE SIT AND THE NTSB HAS DETERMINED THIS TO BE AN 'INCIDENT.'

Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.