ASN Wikibase Occurrence # 319272
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| Date: | Sunday 22 December 2019 |
| Time: | 18:59 |
| Type: |  Boeing 737-824 (WL) |
| Owner/operator: | United Airlines |
| Registration: | N87513 |
| MSN: | 31621/2655 |
| Year of manufacture: | 2008 |
| Engine model: | CFMI CFM56-7B26 |
| Fatalities: | Fatalities: 0 / Occupants: 171 |
| Aircraft damage: | Substantial, repaired |
| Category: | Accident |
| Location: | Denver International Airport, CO (DEN) -
 United States of America
|
| Phase: | Landing |
| Nature: | Passenger - Scheduled |
| Departure airport: | Newark-Liberty International Airport, NJ (EWR/KEWR) |
| Denver International Airport, CO (DEN/KDEN) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
A United Airlines Boeing 737-824, registration N87513, operating as flight 2429 from Newark Liberty International Airport in New Jersey, experienced a collapse of the left main landing gear during landing roll on runway 17R at Denver International Airport in Colorado. There were no injuries to the 165 passengers and 6 crew members onboard. The airplane was substantially damaged.
Probable Cause: Maintenance personnels excessive grinding of the left main landing gears aft trunnion pin during its initial overhaul, which caused heat damage to the base metal and led to the fatigue crack that caused the pin to fail during the accident flight. Contributing to the accident was the failure of maintenance personnel to detect the excessive grinding during the initial overhaul and the fatigue crack during the subsequent overhaul.
Accident investigation:
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Sources:
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