SkyWest Airlines Flight 5788
Embraer S A ERJ170-200LR · Accident: cabin safety event en route
From San Francisco International Airport (SFO) to Saint Louis, MO
Event
- NTSB case
- DCA18CA049
- 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
- Instrument Meteorological Cond
Embraer S A ERJ170-200LR
- Aircraft type
- Embraer ERJ170
- 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
- N128SY
- Operator
- SkyWest Airlines
- Onboard fatalities
- Unknown
- Route
- From San Francisco International Airport (SFO), San Francisco, CATo Saint Louis, MO
- Aircraft age
- About 3 years (built 2014)
- 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
- 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
- Cabin safety event
- 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
- Personnel issues › Task performance
Approximate · Coordinates as recorded by the NTSB; no uncertainty radius is established.
NTSB narrative
On December 17, 2017, about 2345 central standard time, SkyWest flight 5788, an Embraer ERJ700, N128SY, experienced a sudden pitch correction during descent into St. Louis International Airport (STL), St Louis, Missouri. Of the 57 passengers and crew onboard, one flight attendant was seriously injured. The airplane was not damaged. The flight was operating under 14 Code of Federal Regulations Part 121 as a regularly scheduled domestic passenger flight from San Francisco International Airport (SFO) to STL.
According to the flight crew, the captain was the pilot monitoring and the first officer (FO) was the pilot flying and was on his second day of initial operating experience (IOE). The air was smooth with no turbulence. Air traffic control requested the flight give its "best forward speed" and cleared it direct to the airport. The crew discussed and planned the descent and after entering the data into the flight management system (FMS), noticed they were past the top of descent point for the 3-degree descent path they had entered. As a result, the captain had the FO select flight level change and the descent rate briefly exceeded 5,000 feet/minute and the airspeed increased. To prevent an overspeed condition, the captain instructed the FO to deploy the speed brakes, but the speed continued to increase, so the captain disconnected the autopilot and pitched the nose up.
At the time of the unexpected pitch input, the rear flight attendant (FA) was preparing the galley for landing and was thrown off-balance onto the floor, causing her to twist her ankle. Medically qualified passengers assisted the FA until landing. After landing, the FA was transported to the hospital where she was diagnosed with an ankle fracture.
Probable cause
the abrupt pitch up maneuver which caused the flight attendant to lose her balance and injure her ankle.
Verbatim NTSB analysis and probable cause from the NTSB dataset
Sources
NTSB record DCA18CA049
- Event ID
- 20171219X90251
- Case number
- DCA18CA049
- Dataset
- full-current
- Source SHA-256
- 5cf380f0061817c0331a6b2d8cc7e0ee3a79bea469a1001dc5c10e56f35f5ab3
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: local date, investigation status, damage. Values present in the bulk record are kept.
- The date is the local date; the NTSB stores the UTC date 2017-12-18.
- API snapshot SHA-256: fe9dce8b66cd40a0c529092c36773eee61af0f4a59a78ebce68e61b2e741948c; retrieved 2026-09-16T06:12:07.183Z.