ASN Wikibase Occurrence # 226140
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| Date: | Wednesday 12 June 2019 |
| Time: | 17:25 LT |
| Type: |  Beechcraft E90 King Air |
| Owner/operator: | Ameristar Jet Charter |
| Registration: | N176TW |
| MSN: | LW-76 |
| Year of manufacture: | 1974 |
| Total airframe hrs: | 11400 hours |
| Engine model: | Pratt & Whitney PT6A-28 |
| Fatalities: | Fatalities: 0 / Occupants: 3 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Majors Airport (KGVT/GVT), TX -
 United States of America
|
| Phase: | Take off |
| Nature: | Training |
| Departure airport: | Greenville-Majors Field, TX (GVT/KGVT) |
| Fort Worth Alliance Airport, TX (AFW/KAFW) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The pilots were performing an instructional flight with multiple takeoffs and landings when, during one takeoff, the pilots heard a loud noise, and the right main landing gear (MLG) wheel assembly departed the airplane. The pilots elected to perform an emergency landing at another airport due to its larger runways and emergency personnel and equipment. The airplane landed and came to rest upright on the runway surface. Examination of the airplane after landing revealed that the right main wheel/tire and lower shock absorber assembly departed the upper shock absorber assembly. The separated assembly, which was located near the departure airport, impacted the right horizontal stabilizer after separation, which sustained substantial damage.
Metallurgical examination of the assembly revealed that the MLG fractured at the connection between the upper and lower torque knees. Fatigue was identified on a fractured piece of the upper torque knee, and other fractures on the torque knee were consistent with overload. Corrosion assisted in crack initiation, and the crack propagated through fatigue until a critical crack length was reached. It is likely that the fatigue area fractured first and the other connections experienced an increase in loading, which caused them to separate from the MLG assembly.
Probable Cause: The fatigue failure of the right main landing gear upper torque knee.
Accident investigation:
 |
|
Sources:
NTSB CEN19LA166
Location
Media:
#NTSB on King Air E90 N176TW MLG failure on 12 June 2019https://t.co/kquMn0Pkd0#airworthiness #flightsafety pic.twitter.com/HRzmfD9v26
— Aerossurance (@Aerossurance) June 23, 2019
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 13-Jun-2019 19:27 | Captain Adam | Added |
| 13-Jun-2019 22:20 | RobertMB | Updated [Time, Source] |
| 23-Jun-2019 13:01 | Aerossurance | Updated [Time, Operator, Location, Nature, Source, Embed code, Narrative] |
| 27-Mar-2021 20:13 | ASN Update Bot | Updated [Other fatalities, Departure airport, Destination airport, Source, Embed code, Damage, Narrative, Category, Accident report] |
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