ASN Wikibase Occurrence # 278144
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| Date: | Saturday 30 April 2022 |
| Time: | 10:00 |
| Type: |  Beechcraft 99A Airliner |
| Owner/operator: | Freight Runners Express |
| Registration: | N699CZ |
| MSN: | U-10 |
| Year of manufacture: | 1968 |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Milwaukee-General Mitchell Airport (MKE/KMKE), Milwaukee, WI -
 United States of America
|
| Phase: | Standing |
| Nature: | Cargo |
| Departure airport: | Dillon Airport, SC (DLL/KDLC) |
| Milwaukee-General Mitchell Airport, WI (MKE/KMKE) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
On April 30, 2022, about 1000 central daylight time, a Beech B-99 airplane, N699CZ, was substantially damaged when it was involved in an accident at the General Mitchell International Airport (MKE), Milwaukee, Wisconsin. The pilot was not injured. The airplane was operated as a Title 14 Code of Federal Regulations Part 135 on-demand air-cargo flight.
The pilot reported no difficulties during the flight or landing. While taxing the airplane after landing, the green right landing gear position indicator light extinguished, and the red gear handle light illuminated. The pilot glanced over to the circuit breaker panel and noted that the landing gear control circuit breaker had tripped. After parking the airplane for refueling, he notified his company maintenance control group about the issue and was advised to not reposition the airplane after refueling. The pilot waited about 20 minutes for weather to clear before exiting the airplane. As the pilot prepared to exit, the right main landing gear collapsed and the airplane’s right wing impacted the ground, resulting in substantial damage.
Metallurgical examination of the separated fracture surface on the right landing gear drag leg support fitting revealed an area of fatigue in a machined radius adjacent to the center lug of the drag leg support. The remainder of the fracture exhibited features consistent with overload failure. An additional crack was found in the machined radius on the opposite side of the center lug. This portion of the part had not completely separated. Exposure of the crack revealed the existence of a fatigue crack in about the same area as the first crack, with overload signatures outside of the fatigue area.
The airplane maintenance manual indicated that the subject part was to be cleaned and visually inspected at least every 7,500 cycles or every 5 years, whichever occurred first. Maintenance records indicated that the part had accumulated 762 cycles since the most recent inspection 23 months before the accident.
After the accident, the operator examined the drag leg support fittings on their fleet of 9 other airplanes of the same model. Of the 18 fittings examined, 14 were found to be cracked. Of the 14 cracked fittings, 11 could only be detected using dye penetrant inspection, and could not be detected solely by visual inspection.
Probable Cause: A right main landing gear collapse due to fatigue failure of the landing gear drag leg support fitting.
Accident investigation:
 |
|
Sources:
NTSB
https://data.ntsb.gov/Docket?ProjectID=105033
https://flightaware.com/live/flight/N699CZ
History of this aircraft
Other occurrences involving this aircraft
| 21 June 2008 | N99NN | Skydive Factory | 1 | near Bowling Green Municipal Airport (H19), MO | |
non |
Location
Images:
Photo: FAA
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 15-May-2022 05:06 | Captain Adam | Added |
| 29-May-2022 11:39 | Captain Adam | Updated [Time, Phase, Narrative, Category] |
| 14-Mar-2024 19:27 | Captain Adam | Updated [Location, Source, Narrative, Accident report, Photo] |
Corrections or additions? ... Edit this accident description
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