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Accidents · NTSB OPS12WA430 · Preliminary: the investigation is not finished

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.

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 November 2, 2026. Docket and reports at the NTSB.

What the record shows

Date
March 8, 2012 · about 6:42 pm local time · cases in 2012
Place
Ontario, Canada
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

  1. 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

  1. 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 NTSB has not released the docket for this case yet. The docket, the folder of records gathered during an investigation (maintenance records, photographs, witness statements, examinations), is usually released when the investigation is nearly complete, and the list here is refreshed when it appears. Check at the NTSB.

Connections how this case links to the rest of the register

Aircraft
Place
Analytics

The whole map of how records connect · these connections as data: /graph/accident/OPS12WA430.json.

The bigger picture in Aviation Analytics: accidents over time since 1982, by model, by phase of flight and conditions, by place and on the map.

Everything on this page comes from the NTSB's public records. The narrative, probable cause and findings are the NTSB's own words; the coded tables behind the report are written out in plain English, with pilots' ages, home towns and medical details left out. The documents and photographs are the NTSB's docket, shown as the NTSB released them. This site's own text does not name anyone involved, its policy at this time. A preliminary report can change; the final report usually follows one to two years later, and the page is refreshed when it does.