# NTSB SEA93FA020: Cessna T210R, N7381U, Boise, ID, November 10, 1992

- Type: NTSB accident investigation
- Classification: Accident · Fatal · Field investigation · Final report
- Date: November 9, 1992, 19:30 local (Nov 10, 1992, 02:30 UTC)
- Place: Boise, ID
- Coordinates: 43.559871, -116.210563 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=43.5599&lon=-116.2106&mi=10
- Phase of flight: [Approach](https://openairdocs.org/ntsb-phases/500) (OpenAirDocs' grouping)
- Highest injury: Fatal
- Injuries: 1 fatal
- Status: Completed, report September 29, 1993
- Report: Approved by Office Director
- NTSB case key (mKey): 42924
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA93FA020
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/42924/pdf
- Page: https://openairdocs.org/ntsb/SEA93FA020

## Probable cause

PROPER ALTITUDE WAS NOT MAINTAINED. FACTORS TO THE ACCIDENT WERE: FOG, DARK NIGHT CONDITIONS, AND IMPROPER IFR PROCEDURES.

## Sequence of events

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

- In flight collision with object, approach - faf/outer marker to threshold (ifr)
  - weather condition - fog (contributing factor)
  - light condition - dark night (contributing factor)
  - proper altitude - not maintained, pilot in command (cause)
  - ifr procedure - improper, pilot in command
- In flight collision with terrain/water, descent - uncontrolled

## Analysis

DURING A NIGHT TIME VOR/DME APPROACH FOR LANDING IN FOGGY CONDITIONS, THE AIRPLANE COLLIDED WITH A FIFTEEN FOOT HIGH MOVEABLE IRRIGATION SYSTEM LOCATED IN AN OPEN FIELD APPROXIMATELY TWO AND A HALF MILES EAST OF THE AIRPORT.  RADAR DATA INDICATES THAT THE FLIGHT WAS ESTABLISHED ON THE APPROACH AND AT A PROPER ALTITUDE AT THE FINAL APPROACH FIX.  TWO RADAR TARGETS AFTER THE FIX INDICATE THAT THE FLIGHT DESCENDED BELOW THE PUBLISHED MINIMUM ALTITUDE AND COLLIDED WITH THE IRRIGATION SYSTEM. POST CRASH INSPECTION DID NOT REVEAL ANY MECHANICAL FAILURES OR MALFUNCTIONS.

## Aircraft

- Registration: [N7381U](https://openairdocs.org/deregistered/N7381U-1993-05-19), registration cancelled 1993-05-19, S/N 21064966 (OpenAirDocs)
- Reported make and model: CESSNA T210R
- Registry model: [Cessna T210R](https://openairdocs.org/model/cessna-t210r) (registry code 2073459) (OpenAirDocs)
- Category: Airplane
- Serial number: 21064966
- Airframe hours: 1734
- Engines: CONTINENTAL TSI0-520-CE 325 horsepower reciprocating
- Damage: Destroyed
- Fire: On-Ground
- Flight: Part 135
- Operator: Spokane Airways
- Registered owner: Marble Inc.
- Airworthiness certificate: Standard, Normal
- Last inspection: Continuous airworthiness, November 8, 1992
- Departed: TWF, TWIN FALLS, ID
- Flight plan: IFR
- Airport: BOI, Boise, runway 28, 9,763 × 190 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 45; airline transport, commercial, flight instructor; airplane ratings: multi-engine land, single-engine land, multi-engine sea; instrument ratings: airplane; medical: class 2, valid medical--w/ waivers/lim; seat: left; toxicology performed; flight hours: 3,260 total

## Weather

- Conditions: Instrument (IMC), Night/dark
- Wind: 290° at 8 knots
- Altimeter: 30.00 inHg
- Observed at: BOI, 3 nm away

## FAA reports on this event (1)

The FAA's own accident and incident reports, matched to the aircraft by N-number and date (OpenAirDocs).

- [Accident 19921109045879A](https://openairdocs.org/incident/19921109045879A), Nov 9, 1992: Cessna T210R, Boise, ID, Destroyed, 1 fatal. Descended below mda on VOR DME approach and struck irrigation rig. Tower failed to note low altitude alert.

## Other investigations on N7381U (1)

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.

- [NTSB DEN88LA038](https://openairdocs.org/ntsb/DEN88LA038), Dec 19, 1987: Cessna T210R (N7381U), Bismarck, ND, substantial damage

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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