Beech 99 incident near Chicago, Illinois, June 9, 1984
On June 9, 1984 at about 2:26 pm local time, a Beech 99, registered N320BA, suffered minor damage in an incident near Chicago, Illinois (O'Hare airport). It was a flight of an unrecorded kind under charter and air-taxi rules (Part 135). 1 person had minor injuries; 10 others were unhurt. The weather was visual conditions (good weather).
The NTSB's probable cause their words, unchanged
The NTSB has not yet published a probable cause for this incident. Investigations usually take one to two years; this page updates when the final report is released.
Source: NTSB aviation accident database, copy made October 5, 2026. Docket and reports at the NTSB.
What the record shows
- Date
- June 9, 1984 · about 2:26 pm local time
- Place
- Chicago, Illinois · O'Hare
- Type
- Incident
- Injuries
- 1 person had minor injuries; 10 others were unhurt.
- Weather
- visual conditions (good weather)
- Aircraft
- Beech 99 · all 99s on the register
- Registration
- N320BA · registry record · serial U56
- Damage
- Minor damage
- Flight
- Flight of an unrecorded kind · charter and air-taxi rules (Part 135)
The NTSB's narrative final · quoted from the NTSB record
LANDING GEAR EXTENDED BUT NOT LOCKED. CREW COULD NOT RECTIFY SITUATION BY USING NORMAL AND EMERGENCY GEAR EXTENSION PROCEDURES. GEAR COLLAPSED ON TOUCHDOWN. INVESTIGATION DISCLOSED A FATIGUE CRACK IN RT MAIN GEAR HYDRAULIC ACTUATOR ALLOWING A LOSS OF HYDRAULIC FLUID. MAINTENANCE RECORDS PROVIDED BY THE OPERATOR INDICATE THE ACTUATORS WERE CHECKED FOR LEAKS AND ALIGNMENT 28 HRS PRIOR TO THIS INCIDENT.
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
Pilot
- Certificate: airline transport pilot
- Ratings: multi-engine land; single-engine land; instrument: airplane
- Medical certificate: Class 1 (valid medical--w/ waivers/lim.)
- Seat: left
The aircraft
- Airframe total time: 29,000 hours
- Last inspection: continuous airworthiness programme, June 5, 1984; 28 hours since
- Maximum gross weight: 10,400 lb
- Seats: 15
- Landing gear: retractable
- Engine: P&W PT6A-20 (turboprop); 0 hours total
The flight
- Departed from: BMG Bloomington IN at 12:00 pm
- Destination: ORD Chicago IL
- Flight plan: IFR
- Runway 14, 11,600 ft by 200 ft
- A second pilot was aboard
Weather at the time
- Light: daylight
- Wind: from 220° at 5 knots
- Visibility: 4 statute miles
- Sky: broken clouds at 4,600 ft; scat at 400 ft
- Temperature: 72°F (22°C), dew point 68°F (20°C)
- Altimeter: 29.00 inHg
- Observation at 2:23 pm from ORD
Injuries
| Fatal | Serious | Minor | None | |
|---|---|---|---|---|
| Crew | 2 | |||
| Passengers | 1 | 8 |
Documents from the investigation the NTSB's docket: the evidence folder behind the report
The docket, the folder of records gathered during an investigation (maintenance records, photographs, witness statements, examinations), has not been read from the NTSB for this case yet; the list appears here once it has. Open the docket at the NTSB.
Everything on this page comes from the NTSB's public records. The narrative, probable cause and findings are the NTSB's own words; the coded tables behind the report are written out in plain English, with pilots' ages, home towns and medical details left out. The documents and photographs are the NTSB's docket, shown as the NTSB released them. This site's own text never names anyone involved. A preliminary report can change; the final report usually follows one to two years later, and the page is refreshed when it does.