# NTSB DEN83LA196: Beech C23, N6004V, Longmont, CO, August 23, 1983

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: August 23, 1983, 15:00 local (21:00 UTC)
- Place: Longmont, CO
- Coordinates: 40.170341, -105.109252 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=40.1703&lon=-105.1093&mi=10
- Phase of flight: [Initial climb](https://openairdocs.org/ntsb-phases/350) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 16142
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DEN83LA196
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/16142/pdf
- Page: https://openairdocs.org/ntsb/DEN83LA196

## Sequence of events

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

- Loss of engine power(total) - nonmechanical, takeoff - initial climb
  - fluid,fuel - starvation (cause)
  - fuel system - improper use of, dual student (cause)
  - supervision - inadequate, pilot in command(cfi) (cause)
- Forced landing, landing
  - emergency procedure - initiated, pilot in command(cfi)
- On ground/water encounter with terrain/water, landing
  - terrain condition - high vegetation (contributing factor)
  - terrain condition - hidden obstruction(s) (contributing factor)
  - terrain condition - ditch (contributing factor)

## Analysis

THE STUDENT PLT, A FOREIGN NATIONAL, AND THE INSTRUCTOR PLT (CFI) TOOK OFF FROM BROOMFIELD, CO & FLEW TO LONGMONT, CO WHERE THEY BEGAN PRACTICING TOUCH & GO LANDINGS. AFTER THE 3RD TOUCH & GO LANDING, THE ACFT WAS CLIMBING AT ABOUT 300 FT AGL WHEN THE STUDENT TURNED OFF THE ELECTRIC FUEL BOOST PUMP. IMMEDIATELY THEREAFTER, THE ENG LOST POWER. THE CFI TURN BOOST PUMP BACK ON, BUT BY THEN, THE FUEL PRESSURE WAS READING ZERO. THE CFI TOOK CONTROL OF THE ACFT & SWITCHED FUEL TANKS, BUT WAS UNABLE TO RESTART THE ENG. SUBSEQUENTLY, HE LANDED IN A CORN FIELD. DURING THE LANDING, THE ACFT HIT AN IRRIGATION DITCH, WHICH WAS HIDDEN FROM VIEW BY THE CORN STALKS, AND THE NOSE & RIGHT MAIN GEAR COLLAPSED. THE FUEL SELECTOR WAS FOUND POSITIONED TO THE LEFT FUEL TANK WHICH HAD RUPTURED DURING IMPACT. THE RIGHT TANK WAS NOT DAMAGED & WAS FOUND TO BE EMPTY.

## Aircraft

- Registration: [N6004V](https://openairdocs.org/deregistered/N6004V-2015-05-05), registration cancelled 2015-05-05, S/N M-2123, built 1978 (OpenAirDocs)
- Reported make and model: BEECH C23
- Registry model: [Beech C23](https://openairdocs.org/model/beech-c23) (registry code 1151242) (OpenAirDocs)
- Registry engine: [Lycoming O&VO-360 series](https://openairdocs.org/engine/lycoming-o-vo-360-series) (registry code 41514, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: M2123
- Airframe hours: 2195
- Engines: LYCOMING O-360-A4K 180 horsepower reciprocating
- Damage: Substantial damage
- Flight: Instructional, Part 91
- Registered owner: Jeffco Beechcraft, Inc.
- Airworthiness certificate: Standard, Normal
- Last inspection: 100 hour, November 11, 1982
- Departed: BJC, BROOMFIELD, CO
- Airport: 2V2, Longmont Municipal, runway 11, 4,200 × 60 ft

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 27; flight instructor, commercial; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane; medical: class 1, valid medical--w/ waivers/lim; seat: right; flight hours: 738 total, 12 in this make and model, 538 as pilot in command, 135 in the last 90 days, 2 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 270° at 5 knots
- Visibility: 20 statute miles
- Lowest ceiling: none

## 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 19830823046669A](https://openairdocs.org/incident/19830823046669A), Aug 23, 1983: Beech C23, Longmont, CO, Substantial damage. Engine quit on takeoff. Struck a ditch landing off airport. Right fuel tank was empty. No other problems noted.

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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