CHI98LA033 · Beech C90A
Beech C90A · Accident: on ground/water collision with object while taxiing
From Chicago O'Hare International Airport (ORD) to Des Moines International Airport (DSM)
Event
- NTSB case
- CHI98LA033
- Event typeAccident: someone killed or seriously injured, or the aircraft substantially damaged (NTSB definition). Incident: an occurrence that affected or could have affected safety, short of that. Glossary
- Accident
- InvestigationHow far the investigation had got when the record was published: preliminary, ongoing, final or completed. Unknown where the source does not say. Glossary
- Completed
- API-reported fatalities
- 0 · all aircraft and ground
- Ground fatalities
- 0
- OperationWhat kind of flying it was, grouped by the rules it flew under: airline (US Part 121), air taxi and commuter (Part 135), general aviation (Part 91 and similar), military or government. Glossary
- General aviation
- WeatherVisual meteorological conditions (VMC): good enough to fly by looking outside. Instrument conditions (IMC): cloud or low visibility, flying by instruments. Glossary
- Visual Meteorological Cond
Beech C90A
- Aircraft type
- Beechcraft 90
- Category
- Airplane
- RegistrationThe aircraft's tail number, such as N12345 or G-ABCD. Registrations are reissued, so the same one years apart can be a different aircraft. Glossary
- N200HV
- Operator
- Unknown
- Onboard fatalities
- Unknown
- Route
- From Chicago O'Hare International Airport (ORD)To Des Moines International Airport (DSM), Des Moines, IA
- Aircraft age
- Not recorded
- Flight rulesThe regulations the flight operated under: in the US, Part 91 (general aviation), Part 121 (airlines), Part 135 (air taxi and commuter) and others; for flights abroad, the NTSB's coarser commercial or non-commercial code. Glossary
- Part 91: General Aviation
- Phase of flightThe stage of the flight when things started to go wrong: standing, taxi, takeoff, initial climb, en route, maneuvering, approach or landing. Glossary
- Taxi · to runway
- First occurrenceThe single coded event the NTSB judges best describes what happened (records from 2008 on). Older records name the first occurrence in the sequence instead. Glossary
- On ground/water collision with object
- DamageDestroyed: beyond practical repair. Substantial: damage that affects the structure, performance or handling and normally needs major repair. Minor: less than that. Glossary
- Substantial
Cause areas
- Driver of vehicle › Clearance, not maintained
- Driver of vehicle › Improper use of procedure
Approximate · Coordinates as recorded by the NTSB; no uncertainty radius is established.
NTSB narrative
The airplane's taxi instructions were to taxi from the Signature ramp down Delta taxiway to D1, turn north on Bravo taxiway, cross the Bravo bridge to runway 32R. While the airplane was taxiing through the D-3 intersection, a United Airlines lavatory truck impacted the right engine and right propeller pushing the airplane approximately 10 feet off of the taxiway centerline. The O'Hare Law Enforcement department issued a violation to the driver of the truck for failing to give-way to an aircraft. The United Airlines lavatory truck, number LT411, had undergone a 'B' maintenance check on September 12, 1997. The United Airlines O'Hare Operating Procedures for motor vehicles stated in the section for Yielding the Right-of-Way, 'No person shall operate a motor vehicle unless he yields the right-of-way to aircraft in motion. TAXIING AIRCRAFT ALWAYS HAVE THE RIGHT-OF-WAY. The O'Hare Ground Vehicle Operating Regulations state, 'No Person operating a Ground Vehicle shall cross taxiways without bringing the vehicle to a complete stop and observing ground airplane traffic in all directions. TAXIING AIRCRAFT ALWAYS HAVE THE RIGHT-OF-WAY.'
Probable cause
the driver of the vehicle failed to yield the right-of-way to an airplane taxiing in a designated airport taxiway.
Verbatim NTSB analysis and probable cause from the NTSB dataset
Sources
NTSB record CHI98LA033
- Event ID
- 20001208X09145
- Case number
- CHI98LA033
- Dataset
- historical-pre2008
- Source SHA-256
- 89e2df6d848e7ab3b42e7d7c7a03ff403303057a26ca04c95b3ea67201c3ce74
Source notes (4)
- Unreviewed is an editorial label, not an investigation status. API-sourced is not report-checked or human-reviewed. Explicit event totals are used without summing aircraft injury tables; onboard allocation is withheld. Unknown values remain unknown. The operation category is mapped from the NTSB-reported FAR part and has not been reviewed.
- Filled from the NTSB case API where the bulk record had no value: investigation status. Values present in the bulk record are kept.
- The date is the local date, which is the same as the UTC date the NTSB stores.
- API snapshot SHA-256: 685bb209d0bdaa0a908909d5450687a823851d65b8ae3b9160171f13c0d3e540; retrieved 2026-09-21T21:05:23.241Z.