Beech B-99 accident near Milwaukee, Wisconsin, April 30, 2022
On April 30, 2022 at about 3:00 pm local time, a 1968 Beech B-99, registered N699CZ, was substantially damaged in an accident during taxi near Milwaukee, Wisconsin (General Mitchell International airport). It was a business flight under charter and air-taxi rules (Part 135). No one was hurt; 1 person was on board or involved. The weather was visual conditions (good weather).
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The NTSB's probable cause their words, unchanged
A right main landing gear collapse due to fatigue failure of the landing gear drag leg support fitting.
Source: NTSB aviation accident database, copy made October 4, 2026. Docket and reports at the NTSB.
What the record shows
- Date
- April 30, 2022 · about 3:00 pm local time
- Place
- Milwaukee, Wisconsin · General Mitchell International · map
- Type
- Accident
- Injuries
- No one was hurt; 1 person was on board or involved.
- Weather
- visual conditions (good weather)
- Aircraft
- Beech B-99, built 1968 · all B-99s on the register
- Registration
- N699CZ · registry record · serial U-10
- Damage
- Substantial damage
- Flight
- Business flight · charter and air-taxi rules (Part 135)
The NTSB's narrative final · quoted from the NTSB record
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.
The complete narrative as the NTSB published it. The NTSB's docket holds the report as a PDF and any photographs, statements and other documents from the investigation.
The factual record from the NTSB's investigation tables, in plain English
What happened, in order
- Landing gear collapse during taxi defining event
The NTSB's findings
- Aircraft › Aircraft systems › Landing gear system › Main landing gear › Fatigue/wear/corrosion
Pilot
- Certificate: airline transport pilot
- Ratings: multi-engine land; single-engine land; instructor: airplane multi-engine; instructor: airplane single-engine; instrument: airplane
- Flight time: 2,784 hours in all; 320 in this make and model; 220 in the last 90 days; 53 in the last 30 days; 1,675 as pilot in command
- Last flight review: February 28, 2022
- Medical certificate: Class 1 (without waivers/limitations)
- Seat: left
- Injury: no injuries
The aircraft
- Airframe total time: 35,012.9 hours
- Last inspection: approved inspection programme
- Maximum gross weight: 10,955 lb
- Seats: 2
- Landing gear: retractable
- Engine 1: Pratt & Whitney PT6A (turboprop); 0 hours total
- Engine 2: Pratt & Whitney PT6A (turboprop); 0 hours total
The flight
- Departed from: DLL Baraboo WI
- Flight plan: none
Weather at the time
- Light: daylight
- Wind: from 130° at 15 knots, gusting 23
- Visibility: 10 statute miles
- Sky: broken clouds at 4,200 ft
- Temperature: 46°F (8°C), dew point 37°F (3°C)
- Altimeter: 29.87 inHg
- Observation at 9:52 am from MKE
Weather report (METAR): ETAR KMKE 301452Z 13015G23KT 10SM -RA BKN042 BKN080 OVC090 08/03 A2987 RMK AO2 SLP117 P0001 60001 T00830028 58025=
Injuries
| Fatal | Serious | Minor | None | |
|---|---|---|---|---|
| Flig | 1 |
Other NTSB records under N699CZ the same tail number, which may have belonged to a different aircraft at the time
About this page
Everything above comes from the NTSB's public accident database: the narrative, probable cause and findings are the NTSB's own words, and the coded tables behind its report (pilot, aircraft, flight, weather, injuries, sequence of events) are written out in plain English. Pilots' ages, home towns and medical details are left out on purpose. The docket at the NTSB holds the report as a PDF and the investigation's photographs and documents. This site never names pilots, passengers or anyone else involved. A preliminary report describes what is known soon after the event and can change; the final report, with the probable cause, usually follows one to two years later and this page is refreshed when it does. Case number CEN22LA188.