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TWA Flight 840 (1986)

2 Apr 1986 · Argos, Greece

Trans World Airlines Boeing 727-231 · Bombing

From Los Angeles International Airport (LAX) to Cairo International Airport (CAI)

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Event

NTSB case
DCA86RA023
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
Unknown · led by another country; figures from NTSB notifications
Event fatalities
4 · all aircraft and ground
Ground fatalities
Unknown
Occupants
122
Survivors
118
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
7
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
Airline
WeatherVisual meteorological conditions (VMC): good enough to fly by looking outside. Instrument conditions (IMC): cloud or low visibility, flying by instruments. Glossary
Not recorded

Boeing 727-231

Aircraft type
Boeing 727
Category
Airplane · from aircraft type
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
N54340
Onboard fatalities
4
Route
From Los Angeles International Airport (LAX)To Cairo International Airport (CAI)
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 121: Air Carrier
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
Not recorded
Defining eventThe 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
Not recorded
DamageDestroyed: beyond practical repair. Substantial: damage that affects the structure, performance or handling and normally needs major repair. Minor: less than that. Glossary
Not recorded

Cause areas

No findings designated as a cause are recorded in the NTSB data yet.

Approximate · Estimated position: Argos, Peloponnese, the place the Wikipedia article names. Not the accident site.

From the Wikipedia article

Trans World Airlines Flight 840 was a regularly scheduled international flight from Los Angeles to Cairo via New York City, Rome, and Athens on April 2, 1986. About 20 minutes before landing in Athens, a bomb was detonated on the aircraft while it was over Argos, Greece, blasting a hole in the plane's starboard side. Four passengers died after being blown out, while another seven were injured by flying shrapnel and debris. The dead were identified as Alberto Ospina, a Colombian-born American from Stratford, Conn.; Demetra Stylian, 52; her daughter, Maria Klug, 25, and her granddaughter, Demetra, 18 months old, all from Annapolis, Md. The aircraft then made a successful emergency landing with no further loss of life.

Flight

The flight originated in Los Angeles on a Boeing 747 and transferred to a Boeing 727 in Rome for the remainder of the flight. After taking off from Rome, Italy, the flight remained uneventful until around 20 minutes before landing at Athens, when the aircraft was at around 11,000 ft. A bomb hidden underneath seat 10F during an earlier leg of the flight detonated, blasting a hole in the starboard side of the fuselage in front of the wing.

Four American passengers, including an eight-month-old infant, were ejected through the hole to their deaths below. The victims were identified as a Colombian-American man; and a woman, her daughter, and her infant granddaughter. Seven others on the aircraft were injured by shrapnel as the cabin suffered a rapid decompression. However, as the aircraft was in the middle of its approach to Athens, the explosion was not as catastrophic as it would have been at a higher altitude. The remaining 110 passengers survived the incident as pilot Richard "Pete" Petersen made an emergency landing.

Investigation and cause

Investigation

Investigators concluded that the bomb contained one pound of plastic explosive. As the bomb was placed on the floor of the cabin, the explosion tore a hole downward, where the fuselage absorbed the most damage. It is suspected it had been placed beneath the seat on a previous journey by a Lebanese woman (later arrested, never convicted) who worked for the Abu Nidal Organisation, which was dedicated to the destruction of the state of Israel. They had previously hijacked and bombed several other aircraft, as well as committing various terrorist attacks in parts of the Middle East.

Text from the Wikipedia article “TWA Flight 840 (1986)” (revision 1339300958, 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

Sources

Wikipedia article: TWA Flight 840 (1986)
Article
TWA Flight 840 (1986)
Revision
1339300958 · 2026-02-19 · retrieved 2026-09-18
Wikidata
Q7672524
Licence
Text CC BY-SA 4.0, by the article's authors; Wikidata CC0; town positions GeoNames (CC BY 4.0)
NTSB record DCA86RA023
Event ID
20001213X33259
Case number
DCA86RA023
Dataset
historical-pre2008
Source SHA-256
89e2df6d848e7ab3b42e7d7c7a03ff403303057a26ca04c95b3ea67201c3ce74
Where each value comes from
Record
Wikipedia article "TWA Flight 840 (1986)" (page 6903189, revision 1339300958); merged with NTSB case DCA86RA023 (events / aircraft)
Date
Wikipedia infobox: date
Place and country
Wikipedia infobox: site
Map position
Wikipedia: place the Wikipedia infobox site links (Wikidata coordinates)
Aircraft, operator and route
Wikipedia infobox: aircraft type, registration, operator, origin and destination; route airports from the linked airport articles' Wikidata codes (OurAirports); gaps and aircraft details from NTSB record DCA86RA023
Operation
flight number in the article title
Fatalities
Wikipedia: Wikipedia infobox: aircraft fatalities
Ground fatalities
Wikipedia: not stated in the Wikipedia infobox
Summary
Wikipedia infobox: summary
Source notes (2)
  • One occurrence in two sources, merged: the Wikipedia article "TWA Flight 840 (1986)" and NTSB case DCA86RA023, matched by the same aircraft registration and date. For this event outside the United States Wikipedia's values are used where the two differ; each value names its source.
  • No bulk values were replaced by the NTSB case API.