Frontier Airlines Flight 328
Boeing 737-201 · Accident: in flight encounter with weather en route
From Albuquerque International Sunport (ABQ) to Denver International Airport (DEN)
Narrative check · The NTSB narrative appears to contradict this record's injuries. Values are shown as recorded, not corrected; compare with the narrative.
Event
- NTSB case
- FTW96LA271
- 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
- 0
- 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
Boeing 737-201
- Aircraft type
- Boeing 737
- 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
- N207AU
- Operator
- Frontier Airlines
- Onboard fatalities
- Unknown
- Route
- From Albuquerque International Sunport (ABQ), Albuquerque, NMTo Denver International Airport (DEN), Denver, CO
- 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 · 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
- 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, clear air
Approximate · Estimated position: the centre of Granite, CO, the place the record names. Not the accident site.
NTSB narrative
The crew had been forewarned to expect severe turbulence on descent into the Denver area. The 'Fasten Seat Belts' sign was turned on, and flight attendants were instructed to make sure everyone was seated with their seat belts fastened. An elderly woman got up and walked towards the aft lavatory. Light turbulence was encountered as a flight attendant attempted to seat the passenger in a jump seat. Before seat belts could be fastened, the airplane encountered severe turbulence. The passenger and flight attendant were thrown around the cabin, sustaining a serious injury and minor injury, respectively. Another flight attendant and a passenger also sustained minor injuries.
Probable cause
An encounter with clear air turbulence.
Verbatim NTSB analysis and probable cause from the NTSB dataset
Sources
NTSB record FTW96LA271
- Event ID
- 20001208X05988
- Case number
- FTW96LA271
- Dataset
- historical-pre2008
- Source SHA-256
- 89e2df6d848e7ab3b42e7d7c7a03ff403303057a26ca04c95b3ea67201c3ce74
Source notes (4)
- 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: investigation status, damage. 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.
- API snapshot SHA-256: 5c63126ec793461fbd75a54b357154ac86550d3a4854f905be2a5090bc1b1bc3; retrieved 2026-09-18T17:49:26.651Z.