Accident Airbus A319-131 N816UA, Sunday 10 January 2010
ASN logo

Date:Sunday 10 January 2010
Type:Silhouette image of generic A319 model; specific model in this crash may look slightly different    
Airbus A319-131
Owner/operator:United Airlines
Registration: N816UA
MSN: 871
Year of manufacture:1998
Total airframe hrs:39679 hours
Engine model:IAE V2522-A5
Fatalities:Fatalities: 0 / Occupants: 53
Other fatalities:0
Aircraft damage: Substantial, repaired
Location:Newark-Liberty International Airport, NJ (EWR) -   United States of America
Phase: Landing
Nature:Passenger - Scheduled
Departure airport:Chicago-O'Hare International Airport, IL (ORD/KORD)
Destination airport:Newark-Liberty International Airport, NJ (EWR/KEWR)
Investigating agency: NTSB
Confidence Rating: Accident investigation report completed and information captured
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: "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
Report number: DCA10IA021
Status: Investigation completed
Duration: 1 year and 5 months
Download report: Final report


United Airlines



photo (c) NTSB; Newark-Liberty International Airport, NJ (EWR/KEWR); 10 January 2010; (publicdomain)

photo (c) Sergio Cardona; Newark-Liberty International Airport, NJ (EWR/KEWR); 10 January 2010

Revision history:


The Aviation Safety Network is an exclusive service provided by:
Quick Links:

CONNECT WITH US: FSF on social media FSF Facebook FSF Twitter FSF Youtube FSF LinkedIn FSF Instagram

©2024 Flight Safety Foundation

1920 Ballenger Av, 4th Fl.
Alexandria, Virginia 22314