Frontier Airlines Flight 133
Airbus Industrie A319-111 · Accident: in flight encounter with weather en route
From Denver International Airport (DEN) to Dallas Fort Worth International Airport (DFW)
Event
- NTSB case
- DEN03LA063
- 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
- API-reported fatalities
- 0 · all aircraft and ground
- Ground fatalities
- Unknown
- 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
- Visual Meteorological Cond
Airbus Industrie A319-111
- Aircraft type
- Airbus A319
- 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
- N917FR
- Operator
- Frontier Airlines
- Onboard fatalities
- Unknown
- Route
- From Denver International Airport (DEN), Denver, COTo Dallas Fort Worth International Airport (DFW), Dallas, TX
- 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
- 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
- In flight encounter with weather
- DamageDestroyed: beyond practical repair. Substantial: damage that affects the structure, performance or handling and normally needs major repair. Minor: less than that. Glossary
- None
Cause areas
- Weather condition › Turbulence
Approximate · Coordinates from the NTSB case API, which marks them as estimated or does not say; no uncertainty radius is established.
NTSB narrative
The captain stated that the airplane was climbing when they encountered light turbulence at 22,000 feet. One of the pilots called to the flight attendants and asked them to sit down. According to the captain, 30 to 60 seconds later the airplane encountered severe turbulence. One flight attendant fractured two metatarsal bones in her left foot, and another flight attendant received minor injuries. The airplane returned to the airport without further incident.
Probable cause
in-flight encounter with turbulence.
Verbatim NTSB analysis and probable cause from the NTSB dataset
Sources
NTSB record DEN03LA063
- Event ID
- 20030409X00468
- Case number
- DEN03LA063
- Dataset
- historical-pre2008
- Source SHA-256
- 89e2df6d848e7ab3b42e7d7c7a03ff403303057a26ca04c95b3ea67201c3ce74
Source notes (5)
- Unreviewed is an editorial label, not an investigation status. API-sourced is not report-checked or human-reviewed. Explicit event totals are used without summing aircraft injury tables; onboard allocation is withheld. Unknown values remain unknown. The operation category is mapped from the NTSB-reported FAR part and has not been reviewed.
- Filled from the NTSB case API where the bulk record had no value: local date, investigation status, coordinates, damage. Values present in the bulk record are kept.
- The date is the local date; the NTSB stores the UTC date 2003-04-06.
- API snapshot SHA-256: 3172927442f9029a31e428659b61be3d74f8bf6a3060472253ba2cc9bd4eb7fe; retrieved 2026-09-18T15:52:59.495Z.
- The NTSB's operator name is blank for N917FR; the operator shown is the name the NTSB's other records give its FAA operator code, F3LA.