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Last updated: 20 September 2021
Datum:zondag 10 januari 2010
Type:Silhouette image of generic A319 model; specific model in this crash may look slightly different
Airbus A319-131
Luchtvaartmaatschappij:United Airlines
Registratie: N816UA
Constructienummer: 871
Bouwjaar: 1998-07-31 (11 years 6 months)
Aantal vlieguren:39679
Motoren: 2 IAE V2522-A5
Bemanning:slachtoffers: 0 / inzittenden: 5
Passagiers:slachtoffers: 0 / inzittenden: 48
Totaal:slachtoffers: 0 / inzittenden: 53
Schade: Groot
Gevolgen: Repaired
Plaats:Newark-Liberty International Airport, NJ (EWR) (   Verenigde Staten)
Fase: Landing (LDG)
Soort vlucht:Binnenlandse lijnvlucht
Vliegveld van vertrek:Chicago-O'Hare International Airport, IL (ORD/KORD), Verenigde Staten
Vliegveld van aankomst:Newark-Liberty International Airport, NJ (EWR/KEWR), Verenigde Staten
An Airbus A319-131, registered N816UA, was damaged when it landed at Newark-Liberty International Airport, NJ (EWR) with its right hand main landing gear retracted. The occupants were evacuated using the emergency slides.
United Airlines flight UA634 departed Chicago-O'Hare International Airport, IL (ORD) left the gate at 05:51 on a domestic passenger flight to Newark-Liberty International Airport, NJ (EWR). The flight was expected to land at Newark about 09:00 local time. While on finals, about 08:54 the crew apparently experienced problems getting the undercarriage down and locked. The crew carried out a missed approach and climbed to an altitude of 2000 feet. The flight circled the area West of the airport before a new approach was carried out to runway 04L. The airplane landed with the right main gear retracted and came to rest on the runway with the no. 2 engine touching the runway surface.

Probable Cause:

PROBABLE CAUSE: "A mechanical failure of internal components of the right main landing gear door actuator resulting in the flight crew being unable to fully extend the right main landing gear using the normal and alternate procedures.
Contributing to this incident was a circular reference in the company Flight Manual in which the Landing Gear Gravity Extension checklist referred back to the Landing Gear Unsafe Indication After Extension checklist rather than the Landing Gear - Partial Gear or Gear Up Landing checklist."

Accident investigation:
Investigating agency: NTSB
Status: Investigation completed
Duration: 1 year and 6 months
Accident number: DCA10IA021
Download report: Summary report

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EASA issued 2 Airworthiness Directives

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photo of Airbus-A319-131-N816UA
accident date: 10-01-2010
type: Airbus A319-131
registration: N816UA
photo of Airbus-A319-131-N816UA
accident date: 10-01-2010
type: Airbus A319-131
registration: N816UA

Video, social media
United Flight 634 after emergency landing at Newark on Twitpic Share photos on twitter with Twitpic

Deze kaart geeft het vliegveld van vetrek weer en de geplande bestemming van de vlucht. De lijn tussen de vliegvelden geeft niet de exacte vliegroute weer.
De afstand tussen Chicago-O'Hare International Airport, IL en Newark-Liberty International Airport, NJ bedraagt 1146 km (717 miles).
Accident location: Approximate; accuracy within a few kilometers.

This information is not presented as the Flight Safety Foundation or the Aviation Safety Network’s opinion as to the cause of the accident. It is preliminary and is based on the facts as they are known at this time.
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