FLIGHT FINDINGSAVIATION OCCURRENCE MAP
Back to map

1984 San Luis Obispo mid-air collision

24 Aug 1984 · Near San Luis Obispo, California

Wings West Airlines Beech C-99 and Aesthetech Corporation (Flight school) Rockwell 112TC · Mid-air collision due to pilot error on both aircraft

Report a problem

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
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
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.