ASN Wikibase Occurrence # 370148
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| Date: | Tuesday 8 September 2009 |
| Time: | 11:54 LT |
| Type: |  Boeing 737-3G7 |
| Owner/operator: | Southwest Airlines |
| Registration: | N670SW |
| MSN: | 23794/1424 |
| Total airframe hrs: | 69060 hours |
| Engine model: | CFM 56 Series |
| Fatalities: | Fatalities: 0 / Occupants: 142 |
| Aircraft damage: | Minor |
| Category: | Serious incident |
| Location: | Los Angeles, CA -
 United States of America
|
| Phase: | Landing |
| Nature: | Passenger - Scheduled |
| Departure airport: | Las Vegas-McCarran International Airport, NV (LAS/KLAS) |
| Los Angeles International Airport, CA (LAX/KLAX) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
During landing, the inboard axle of the right main landing gear separated from the airplane. The crew taxied the airplane off the runway and the passengers and crew deplaned with no injuries. Examination of the axle revealed an area of fatigue cracking emanating from the brake mounting bolt hole at the 12:00 position. The fatigue crack likely initiated in an area where there was scoring and fretting damage to the Sermetal coating. In-service examination of brake mounting bolt torque indicated that over time, the brake mounting bolts may loosen allowing the bolts to spin in the holes.
Probable Cause: The failure of the right main landing gear inboard axle due to fatigue cracking as a result of fretting damage in one of the brake mounting bolt holes.
Accident investigation:
 |
|
Sources:
NTSB ENG09IA014
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 25-Mar-2024 07:38 | ASN Update Bot | Added |
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