ASN Wikibase Occurrence # 138454
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| Date: | Sunday 4 September 2011 |
| Time: | 17:45 |
| Type: |  North American TB-25N Mitchell |
| Owner/operator: | RAG Wings & Radials Aircraft |
| Registration: | N9079Z |
| MSN: | 108-34009 |
| Year of manufacture: | 1944 |
| Total airframe hrs: | 2242 hours |
| Engine model: | Wright R-2600 SER |
| Fatalities: | Fatalities: 0 / Occupants: 5 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Sussex County Airport, Georgetown, DE -
 United States of America
|
| Phase: | Taxi |
| Nature: | Private |
| Departure airport: | Patuxent River NAS, MD (NHK/KNHK) |
| Georgetown-Sussex County Airport, DE (GED/KGED) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
According to both pilots, they landed the airplane and felt the right wing drop during the landing roll. They attempted to maintain directional control, but the right wing dropped further and the airplane veered off of the right side of the runway. During a subsequent examination of the wreckage, the right main landing gear shock strut drag arm was found broken. An examination of the broken drag arm revealed that it fractured in the I-beam at the blend radius of an orthogonal arm due to bending fatigue. Given the extent of fatigue crack propagation in the flange of the I-beam, it is likely that the fracture occurred due to high-cycle, low-stress fatigue. Since the depth of the fatigue crack was significant relative to the I-beam flange thickness, the fatigue crack probably developed and propagated over a long time under numerous low-stress cycles. The most recent inspection of the main landing gear was on July 7, 2011, which was in accordance with a conditional inspection. The inspection required a mechanic to verify the condition and security of the main landing gear. It is most likely that the fatigue crack would have been detectable at the time of that inspection.
Probable Cause: Maintenance personnel's inadequate examination of the main landing gear during the airplane’s most recent conditional inspection, which resulted in the fatigue failure of the right main landing gear shock strut drag arm during the landing roll.
Accident investigation:
 |
|
Sources:
NTSB
History of this aircraft
Other occurrences involving this aircraft
| 18 September 1988 | N9079Z | BOM Corp | 0 | Kickapoo Downtown Airport, TX | |
sub |
| 13 April 2013 | N9079Z | RAG Wings & Radials Aircraft | 0 | Lakeland International Airport, FL (LAL/KLAL) | |
min |
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 09-Sep-2011 00:05 | Johnny_S | Added |
| 13-Sep-2011 15:24 | RobertMB | Updated [Date, Time, Aircraft type, Cn, Operator, Total occupants, Location, Departure airport, Destination airport, Source, Narrative] |
| 16-Sep-2011 10:59 | Geno | Updated [Location, Destination airport, Source] |
| 21-Dec-2016 19:26 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
| 27-Nov-2017 17:14 | ASN Update Bot | Updated [Cn, Operator, Total occupants, Other fatalities, Nature, Departure airport, Destination airport, Source, Narrative] |
Corrections or additions? ... Edit this accident description
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