Gulfstream Aerospace GV SP (G550) and Cessna 750 incident near Ontario, Ca, March 8, 2012
On March 8, 2012 at about 6:42 pm local time, 2 aircraft, Gulfstream Aerospace GV SP (G550) (N128GV) and Cessna 750 (N717XJ), were involved in the same incident near Ontario. The NTSB record does not give the injuries. The weather was conditions the NTSB did not record.
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The NTSB's probable cause their words, unchanged
The NTSB has not yet published a probable cause for this incident. Investigations usually take one to two years; this page updates when the final report is released.
Source: NTSB aviation accident database, copy made October 4, 2026. Docket and reports at the NTSB.
What the record shows
- Date
- March 8, 2012 · about 6:42 pm local time
- Place
- Ontario, Ca
- Type
- Incident
- Injuries
- The NTSB record does not give the injuries.
- Weather
- conditions the NTSB did not record
- Aircraft 1
- Gulfstream Aerospace GV SP (G550) SP G550, built 2012 · all GV SP (G550)s on the register
- Registration
- N128GV · registry record · serial 5363
- Damage
- Not recorded
- Flight
- Business flight · general aviation rules (Part 91)
- Aircraft 2
- Cessna 750 NO SERIES, built 2003 · all 750s on the register
- Registration
- N717XJ · registry record · serial 750-0217
- Damage
- Not recorded
- Flight
- Business flight · general aviation rules (Part 91)
The NTSB's narrative for the Gulfstream Aerospace GV SP (G550) preliminary · quoted from the NTSB record
N217AL, a private Cessna 750, was en route between San Jose, California (KSJC), and Bedford, Massachusetts (KBED) at FL430. N128GV, a private Gulfstream V, was en route between Bradley/Windsor Locks, Connecticut (KBDL), and San Francisco, California (KSFO), at FL430. Twenty nm northwest of YXU VOR on J16 Airway the two aircraft passed, separated by 1 mile laterally and 900 feet vertically, where 5 nm lateral or 2000 foot vertical spacing was required.
The complete narrative as the NTSB published it. The NTSB's docket holds the report as a PDF and any photographs, statements and other documents from the investigation.
The NTSB's narrative for the Cessna 750 preliminary · quoted from the NTSB record
N217AL, a private Cessna 750, was en route between San Jose, California (KSJC), and Bedford, Massachusetts (KBED) at FL430. N128GV, a private Gulfstream V, was en route between Bradley/Windsor Locks, Connecticut (KBDL), and San Francisco, California (KSFO), at FL430. Twenty nm northwest of YXU VOR on J16 Airway the two aircraft passed, separated by 1 mile laterally and 900 feet vertically, where 5 nm lateral or 2000 foot vertical spacing was required.
The complete narrative as the NTSB published it. The NTSB's docket holds the report as a PDF and any photographs, statements and other documents from the investigation.
The factual record for the Gulfstream Aerospace GV SP (G550) from the NTSB's investigation tables, in plain English
What happened, in order
- Air traffic event during enroute (cruise) defining event
The NTSB's findings
- cause Personnel issues › Task performance › Communication (personnel) › Accuracy of communication › ATC personnel
- factor Personnel issues › Task performance › Use of equip/info › Use of policy/procedure › ATC personnel
The aircraft
- Landing gear: fixed
- Engine 1: Rolls-Royc BR700-710C411; 0 hours total
- Engine 2: Rolls-Royc BR700-710C411; 0 hours total
The flight
- Departed from: BDL Windsor Locks CT
- Destination: SFO San Francisco CA
- Flight plan: IFR
- A second pilot was aboard
Weather at the time
- Temperature: 0°F (-18°C), dew point 0°F (-18°C)
The factual record for the Cessna 750 from the NTSB's investigation tables, in plain English
What happened, in order
- Air traffic event during enroute (cruise) defining event
The NTSB's findings
- cause Personnel issues › Task performance › Communication (personnel) › Accuracy of communication › ATC personnel
- factor Personnel issues › Task performance › Use of equip/info › Use of policy/procedure › ATC personnel
The aircraft
- Landing gear: retractable
The flight
- Departed from: SJC San Jose CA
- Destination: BED Bedford MA
- Flight plan: IFR
- A second pilot was aboard
Documents from the investigation the NTSB's docket: the evidence folder behind the report
The docket, the folder of records gathered during an investigation (maintenance records, photographs, witness statements, examinations), has not been read from the NTSB for this case yet; the list appears here once it has. Open the docket at the NTSB.
About this page
Everything above comes from the NTSB's public accident database: the narrative, probable cause and findings are the NTSB's own words, and the coded tables behind its report (pilot, aircraft, flight, weather, injuries, sequence of events) are written out in plain English. Pilots' ages, home towns and medical details are left out on purpose. The documents and photographs are the NTSB's docket, the folder of records gathered during the investigation, shown as the NTSB released them (the NTSB redacts some personal details first) and listed under the NTSB's own titles. This site's own text never names pilots, passengers or anyone else involved. A preliminary report describes what is known soon after the event and can change; the final report, with the probable cause, usually follows one to two years later and this page is refreshed when it does. Case number OPS12WA430.