1984 San Luis Obispo mid-air collision
Wings West Airlines Beech C-99 and Aesthetech Corporation (Flight school) Rockwell 112TC · Mid-air collision due to pilot error on both aircraft
Narrative check · The NTSB narrative appears to contradict this record's departure or destination. Values are shown as recorded, not corrected; compare with the narrative.
Event
- NTSB case
- DCA84AA034
- Event typeAccident: someone killed or seriously injured, or the aircraft substantially damaged (NTSB definition). Incident: an occurrence that affected or could have affected safety, short of that. Glossary
- Accident
- InvestigationHow far the investigation had got when the record was published: preliminary, ongoing, final or completed. Unknown where the source does not say. Glossary
- Completed
- Event fatalities
- 17 · all aircraft and ground
- Ground fatalities
- 0
- Occupants
- 17
- Survivors
- 0
- InjuriesFatal: death within 30 days. Serious: over 48 hours in hospital within a week, most broken bones, severe bleeding, nerve or organ damage, or serious burns. Minor: anything less. Glossary
- 0 serious · 0 minor (NTSB)
- OperationWhat kind of flying it was, grouped by the rules it flew under: airline (US Part 121), air taxi and commuter (Part 135), general aviation (Part 91 and similar), military or government. Glossary
- Charter & commuter
- WeatherVisual meteorological conditions (VMC): good enough to fly by looking outside. Instrument conditions (IMC): cloud or low visibility, flying by instruments. Glossary
- Visual Meteorological Cond
Aircraft 1 · Beech C-99
- Flight
- RM628
- Aircraft type
- Beechcraft C-99
- Category
- Airplane
- RegistrationThe aircraft's tail number, such as N12345 or G-ABCD. Registrations are reissued, so the same one years apart can be a different aircraft. Glossary
- N6399U
- Operator
- Wings West Airlines
- Onboard fatalities
- Unknown
- Occupants
- 15
- Survivors
- 0
- InjuriesFatal: death within 30 days. Serious: over 48 hours in hospital within a week, most broken bones, severe bleeding, nerve or organ damage, or serious burns. Minor: anything less. Glossary
- None · no survivors
- Route
- From San Luis Obispo, CATo San Francisco International Airport (SFO)
- Aircraft age
- Not recorded
- Flight rulesThe regulations the flight operated under: in the US, Part 91 (general aviation), Part 121 (airlines), Part 135 (air taxi and commuter) and others; for flights abroad, the NTSB's coarser commercial or non-commercial code. Glossary
- Part 135: Air Taxi & Commuter
- Phase of flightThe stage of the flight when things started to go wrong: standing, taxi, takeoff, initial climb, en route, maneuvering, approach or landing. Glossary
- En route · climb to cruise
- First occurrenceThe single coded event the NTSB judges best describes what happened (records from 2008 on). Older records name the first occurrence in the sequence instead. Glossary
- Midair collision
- DamageDestroyed: beyond practical repair. Substantial: damage that affects the structure, performance or handling and normally needs major repair. Minor: less than that. Glossary
- Destroyed
Aircraft 2 · Rockwell 112TC
- Aircraft type
- Rockwell 112
- Category
- Airplane
- RegistrationThe aircraft's tail number, such as N12345 or G-ABCD. Registrations are reissued, so the same one years apart can be a different aircraft. Glossary
- N112SM
- Onboard fatalities
- Unknown
- Occupants
- 2
- Survivors
- 0
- InjuriesFatal: death within 30 days. Serious: over 48 hours in hospital within a week, most broken bones, severe bleeding, nerve or organ damage, or serious burns. Minor: anything less. Glossary
- None · no survivors
- Route
- From Paso Robles, CATo Paso Robles Municipal Airport, California, United States
- Aircraft age
- Not recorded
- Flight rulesThe regulations the flight operated under: in the US, Part 91 (general aviation), Part 121 (airlines), Part 135 (air taxi and commuter) and others; for flights abroad, the NTSB's coarser commercial or non-commercial code. Glossary
- Part 91: General Aviation
- Phase of flightThe stage of the flight when things started to go wrong: standing, taxi, takeoff, initial climb, en route, maneuvering, approach or landing. Glossary
- En route · descent
- First occurrenceThe single coded event the NTSB judges best describes what happened (records from 2008 on). Older records name the first occurrence in the sequence instead. Glossary
- Midair collision
- DamageDestroyed: beyond practical repair. Substantial: damage that affects the structure, performance or handling and normally needs major repair. Minor: less than that. Glossary
- Destroyed
Cause areas
- Pilot in command › Artcc service, delayed
- Pilot in command › Radar assistance to VFR aircraft, not used
- Pilot of other aircraft › Artcc service, delayed
- Pilot of other aircraft › Radar assistance to VFR aircraft, not used
Approximate · Coordinates as recorded by the NTSB; no uncertainty radius is established.
From the Wikipedia article
The 1984 San Luis Obispo mid-air collision was an accident involving a Beechcraft C-99 Commuter and a Rockwell Commander 112 near San Luis Obispo, California, United States on August 24, 1984. None of the combined 17 passengers and crew on either aircraft survived the accident.
Accident
Wings West Airlines Flight 628 was on a scheduled flight from Los Angeles, United States to San Francisco, United States with scheduled stops at Santa Maria, United States and San Luis Obispo, United States, where the aircraft picked up six and seven passengers respectively. The aircraft was flown by Captain Paul Nebolon (aged 27), who had 4,110 total flying hours including 873 hours on the Beechcraft, and co-pilot Deverl Johnson (aged 45) who had acquired 6,194 total flight hours including 62 hours on the Beechcraft. Flight 628 left the gate at San Luis Obispo-County Airport at 11.10 am, and took off from runway 29 six minutes later, bound for San Francisco. Weather at the time was clear, with a visibility of 15 miles (24.14 km).
Around the same time, a single-engined Rockwell Commander 112 which had a student and instructor onboard on an instrument training flight, had taken off from the same airport as Flight 628 at 10.55 am without a flight plan, and was now returning to the airport. While Flight 628 was climbing to 2700 ft at 11.16 am, the Commander had started its approach to San Luis Obispo-County Airport. At the time, both planes were flying through visual means instead of the usual IFR.
At 11.17 am and 23 seconds, Flight 628 was cleared for San Francisco and to climb and maintain an altitude of 7000 ft. Fifteen seconds later, Flight 628 collided head-on with the Commander at an altitude of 3400 ft. The Commander was sheared nearly in half by the collision, while Flight 628 spiraled mostly intact towards the ground, ultimately crashing north of the airport in a hilly and rural area off Highway 1, scattering flaming wreckage which ignited a 20 acre brush fire that was quickly contained. Emergency services, including a helicopter, arrived on the scene and recovered the remains of the occupants from both planes. All 17 people on both aircraft had perished. The badly mangled bodies were brought to local mortuaries that evening, where an FBI disaster team would attempt to identify the remains. The crash was the first accident for Wings West Airlines, since their founding in 1979.
Text from the Wikipedia article “1984 San Luis Obispo mid-air collision” (revision 1372402268, retrieved 2026-09-18) by its authors, under CC BY-SA 4.0. Extracted as plain text: references, tables, images and some sections are left out. Read the article
NTSB narrative
AT ABOUT 1118, A BEECH C-99 (WINGS WEST FLT 628), N6399U, & A ROCKWELL 112TC, N112SM, COLLIDED IN MIDAIR ABOUT 8 MI WEST-NORTHWEST OF THE SAN LOUI OBISPO COUNTY ARPT. THE ROCKWELL 112TC HAD DEPARTED PASO ROBLES, CA & WAS DESCENDING TOWARD THE SAN LOUI OBISPO COUNTY ARPT. THE BEECH C-99 HAD DEPARTED SAN LOUI OBISPO & WAS CLIMBING ON A FLT TO SAN FRANCISCO. THEY COLLIDED HEAD-ON AT ABOUT 3400 FT MSL IN CLEAR WX. THE C-99 CREW HAD JUST CONTACTED LOS ANGELES ARTCC. AT THAT TIME, THE AIRCREWS OF BOTH ACFT WERE GOVERNED BY THE 'SEE-AND-AVOID' CONCEPT WITH REGARD TO EACH OTHER. AN INVESTIGATION REVEALED THAT THE STANDARD DEPARTURE & INSTRUMENT APCH PROCEDURES SHARED A COMMON TRACK. THE C-99 WAS DEPARTING ALONG THE DEPARTURE TRACK. JUST PRIOR TO THE COLLISION, THE 112TC CREW HAD CONTACTED UNICOM & REPORTED AT THE DOBRA INTERSECTION WHICH WAS ON THE ILS APCH COURSE. AFTER COLLIDING, BOTH ACFT CRASHED ON OPEN TERRAIN & BURNED. THE CONTROLLER HAD ONLY SECONDS TO APPRAISE RADAR DATA & ISSUE A SAFETY ADVISORY. WINGS WEST REQD 1 RADIO ON COMPANY FREQ.
Verbatim NTSB analysis from the NTSB dataset
Sources
Wikipedia article: 1984 San Luis Obispo mid-air collision
- Revision
- 1372402268 · 2026-08-31 · retrieved 2026-09-18
- Wikidata
- Q115816018
- Licence
- Text CC BY-SA 4.0, by the article's authors; Wikidata CC0; town positions GeoNames (CC BY 4.0)
NTSB record DCA84AA034
- Event ID
- 20001214X40665
- Case number
- DCA84AA034
- Dataset
- historical-pre2008
- Source SHA-256
- 89e2df6d848e7ab3b42e7d7c7a03ff403303057a26ca04c95b3ea67201c3ce74
Where each value comes from
- Record
- Wikipedia article "1984 San Luis Obispo mid-air collision" (page 72444074, revision 1372402268); merged with NTSB case DCA84AA034 (events / aircraft)
- Date
- NTSB record DCA84AA034: NTSB API eventDate, eventTimeUtc and eventTimeUtcOffsetHours (local date)
- Place and country
- Wikipedia infobox: site; country from NTSB record DCA84AA034
- Map position
- NTSB record DCA84AA034: events decimal coordinates
- Aircraft, operator and route
- NTSB record DCA84AA034: aircraft; gaps from Wikipedia infobox: aircraft type, registration, operator, origin and destination; route airports from the linked airport articles' Wikidata codes (OurAirports)
- Operation
- NTSB record DCA84AA034: operated under Part 135: Air Taxi & Commuter, Part 91: General Aviation
- Fatalities
- NTSB record DCA84AA034: NTSB API totalFatal
- Ground fatalities
- NTSB record DCA84AA034: NTSB API ongroundFatal
- Summary
- Wikipedia infobox: summary
Source notes (3)
- One occurrence in two sources, merged: the Wikipedia article "1984 San Luis Obispo mid-air collision" and NTSB case DCA84AA034, matched by the same aircraft registration and date. For this US event the NTSB's values are used where the two differ; each value names its source.
- Filled from the NTSB case API where the bulk record had no value: investigation status. Values present in the bulk record are kept.
- The date is the local date, which is the same as the UTC date the NTSB stores.