American Airlines Flight 1396
McDonnell Douglas DC-9-82 (MD-82) · Accident: uncontrolled altitude deviation en route
From John Wayne Orange County International Airport (SNA) to St. Louis Lambert International Airport (STL)
Event
- NTSB case
- CHI04LA127
- 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
McDonnell Douglas DC-9-82 (MD-82)
- Aircraft type
- McDonnell Douglas DC-9
- 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
- N573AA
- Operator
- American Airlines
- Onboard fatalities
- Unknown
- Route
- From John Wayne Orange County International Airport (SNA), Orange County, CATo St. Louis Lambert International Airport (STL), St. Louis, MO
- 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
- Uncontrolled altitude deviation
- 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, convection induced
Approximate · Coordinates from the NTSB case API, which marks them as estimated or does not say; no uncertainty radius is established.
NTSB narrative
A flight attendant was seriously injured and a passenger received a minor injury when the airplane encountered turbulence during an arrival descent. The airplane was descending through 12,000 feet at 280 to 290 knots when it encountered an updraft. The captain reported they had just entered the cloud tops when they encountered an updraft that lasted about 2 seconds. The cockpit crew was then informed that a flight attendant in the rear of the airplane was thrown off her feet and injured. A passenger who was in the lavatory when the turbulence was encountered, reported that he hit his head. The flight crew declared an emergency. The flight was immediately cleared for an approach, and they were met by medical personnel after an uneventful landing. The passenger refused treatment. The flight attendant was transported to a hospital where it was determined that she suffered broken ribs, a fractured wrist, and pelvic fractures. According to crewmembers, the seatbelt sign was on when the turbulence was encountered. Although storms were not present along the flight path, SIGMETS had been issued for severe storms in the surrounding area. Approximately 15 minutes after this accident, another MD-80 reported severe turbulence along the same route.
Probable cause
The unexpected encounter with convective turbulence which resulted in a flight attendant being injured.
Verbatim NTSB analysis and probable cause from the NTSB dataset
Sources
NTSB record CHI04LA127
- Event ID
- 20040601X00708
- Case number
- CHI04LA127
- 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: investigation status, coordinates, 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: 89886d80570d2d4206647b02e3ad6eb9af826e285632150d1354ee9b3288d01f; retrieved 2026-09-18T15:24:46.794Z.
- The NTSB's operator name is blank for N573AA; the operator shown is the name the NTSB records it doing business as.