# NTSB BFO90MA023: Hawker Siddeley HS.125-35, Columbia, MO, January 31, 1990

- Type: NTSB accident investigation
- Classification: Accident · Fatal · Major investigation · Final report
- Date: January 30, 1990, 22:05 local (Jan 31, 1990, 04:05 UTC)
- Place: Columbia, MO
- Coordinates: 38.950763, -92.319831 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=38.9508&lon=-92.3198&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: Fatal
- Injuries: 1 fatal, 1 serious, 1 minor
- Status: Completed, report September 11, 1992
- Report: Approved by Office Director
- NTSB case key (mKey): 11616
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=BFO90MA023
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/11616/pdf
- Page: https://openairdocs.org/ntsb/BFO90MA023

## Probable cause

INADEQUATE PREFLIGHT BY THE PILOT(S), WATER CONTAMINATION OF THE FUEL, LOW LEVEL OF DEICE FLUID (METHANOL) IN THE DEICE TANK, AND SUBSEQUENT ICE BLOCKAGE OF THE FUEL FILTERS.  DARKNESS WAS A RELATED FACTOR.

## Sequence of events

In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf).

- Loss of engine power(total) - nonmechanical, cruise
  - 2 engines
  - aircraft preflight - inadequate, pilot in command (cause)
  - fluid,fuel - water (cause)
  - fluid,anti-ice additive - low level (cause)
  - fuel system,filter - ice (cause)
  - fluid,fuel - blocked(total) (cause)
- Forced landing, descent - emergency
- In flight collision with terrain/water, landing
  - light condition - dark night (contributing factor)
  - terrain condition - rough/uneven
- On ground/water collision with object, landing
  - object - tree(s)

## Analysis

THE ACFT WAS EN ROUTE AT 31,000 FT, WHEN THE LOW PRESSURE FUEL FILTER WARNING LIGHT ILLUMINATED.  THE PLT DIVERTED TOWARD COLUMBIA, MO, BUT BEFORE REACHING COLUMBIA, BOTH ENGINES LOST POWER.  SUBSEQUENTLY, THE ACFT CRASHED ABOUT 2 MI EAST OF THE ARPT.  AN INVESTIGATION REVEALED THE FUEL WAS CONTAMINATED WITH WATER.  THE FUEL FILTER DEICING SYSTEM WAS OPERATIONAL, BUT A POST-ACDNT EXAM REVEALED THE DEICING TANK WAS EMPTY.  THIS WAS THE 2ND FLT SINCE THE DEICE TANK HAD BEEN SERVICED.  THE MANUFACTURER'S INFO INDICATED THE SUPPLY TANK SHOULD HAVE PROVIDED ABOUT 3 TO 4 HRS OF FILTER DEICING OPERATION.

## Aircraft

- Registration: G0B0B (not matched to a registry record)
- Reported make and model: Hawker Siddeley HS.125-35
- Category: Airplane
- Serial number: 25069
- Airframe hours: 8720
- Engines: Rolls-Royce 522 3360 lbs thrust turbo jet
- Damage: Destroyed
- Flight: Executive/Corporate, Part 91 subpart F
- Registered owner: Slender You (Uk) Ltd
- Airworthiness certificate: Standard, Normal
- Last inspection: AAIP, January 25, 1990, 0 hours before
- Departed: CSV, CROSSVILLE, TN
- Destination: IXD, OLATHE, KS
- Flight plan: IFR
- Airport: COU, Columbia Regional

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 28; flight instructor, airline transport; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane; medical: class 1, valid medical--no waivers/lim.; seat: left; flight hours: 1,525 total, 400 in this make and model

## Weather

- Conditions: Visual (VMC), Night/dark
- Wind: 60° at 8 knots
- Visibility: 15 statute miles
- Lowest ceiling: none
- Temperature: 30 °F, dew point 25 °F
- Altimeter: 30.00 inHg
- Observed at: COU

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

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