ASN Aircraft accident Airbus A319-131 N816UA Newark-Liberty International Airport, NJ (EWR)
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Status:Accident investigation report completed and information captured
Date:Sunday 10 January 2010
Type:Silhouette image of generic A319 model; specific model in this crash may look slightly different
Airbus A319-131
Operator:United Airlines
Registration: N816UA
MSN: 871
First flight: 1998-07-31 (11 years 6 months)
Total airframe hrs:39679
Engines: 2 IAE V2522-A5
Crew:Fatalities: 0 / Occupants: 5
Passengers:Fatalities: 0 / Occupants: 48
Total:Fatalities: 0 / Occupants: 53
Aircraft damage: Substantial
Aircraft fate: Repaired
Location:Newark-Liberty International Airport, NJ (EWR) (   United States of America)
Phase: Landing (LDG)
Nature:Domestic Scheduled Passenger
Departure airport:Chicago-O'Hare International Airport, IL (ORD/KORD), United States of America
Destination airport:Newark-Liberty International Airport, NJ (EWR/KEWR), United States of America
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

Gear-up landing
Forced landing on runway

» Flightaware
» United Airlines

Follow-up / safety actions

EASA issued 2 Airworthiness Directives

Show all...


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

This map shows the airport of departure and the intended destination of the flight. The line between the airports does not display the exact flight path.
Distance from Chicago-O'Hare International Airport, IL to Newark-Liberty International Airport, NJ as the crow flies is 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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