# NTSB DEN88DTI01: Judge Q2, N31DJ, Cut Bank, MT, May 12, 1988

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Final report
- Date: May 12, 1988, 16:42 local (22:42 UTC)
- Place: Cut Bank, MT
- Coordinates: 48.650623, -112.840042 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=48.6506&lon=-112.8400&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 June 9, 1989
- Report: Approved by Office Director
- NTSB case key (mKey): 17331
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DEN88DTI01
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/17331/pdf
- Page: https://openairdocs.org/ntsb/DEN88DTI01

## Sequence of events

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

- Loss of engine power, takeoff - initial climb
  - weather condition - high density altitude (contributing factor)
  - mixture - improper use of, pilot in command (cause)
  - lack of total experience in type operation, pilot in command (contributing factor)
- In flight collision with terrain/water, takeoff - aborted
  - terrain condition - rough/uneven (contributing factor)

## Analysis

THE ACDT OCCURRED ON THE ARPT WHEN THE PLT DECIDED TO ABORT THE FLT SHORTLY AFTER TAKEOFF. THE PLT SAID THAT AFTER TAKEOFF THE ACFT DID NOT SEEM TO ACCELERATE PROPERLY SO HE DECIDED TO LAND. THE TAKEOFF HAD BEEN MADE ON A 5300 FT LONG RWY WHICH HAS A 600 FT OVERRUN AND A 2545 FT SECTION OF UNUSABLE RWY BEYOND THE OVERRUN. THE PLT SAID THE ACFT DRIFTED TO THE RT AFTER TAKEOFF AND THE LANDING WAS MADE IN THE GRASS AREA BESIDE THE UNUSABLE SECTION OF THE RWY. AFTER LANDING THE ACFT CROSSED AN ABANDONED RWY FROM WHICH THE ASPHALT HAD BEEN REMOVED. UPON CROSSING THE ABANDONED RWY THE ACFT STRUCK A LIP AND THE LT CANARD BROKE OFF. THE DENSITY ALT AT THE TIME OF THE ACDT WAS ABOUT 5900 FT. THE PLT SAID THE FLIGHT MANUAL INSTRUCTIONS FOR HIGH ALT OPERATIONS IN THIS ACFT ARE SKETCHY.

## Aircraft

- Registration: [N31DJ](https://openairdocs.org/deregistered/N31DJ-1991-03-28), registration cancelled 1991-03-28, S/N 2876 (OpenAirDocs)
- Reported make and model: JUDGE Q2
- Registry model: [Judge Daniel J Q-2](https://openairdocs.org/model/judge-daniel-j-q-2) (registry code 05645ZV) (OpenAirDocs)
- Category: Airplane, amateur-built
- Serial number: 2876
- Airframe hours: 60
- Engines: REVMASTER 210D-DQ 75 horsepower reciprocating
- Damage: Substantial damage
- Flight: Instructional, Part 91
- Operator: Daniel J. Judge
- Registered owner: Daniel J. Judge
- Airworthiness certificate: Special, Experimental (Special)
- Last inspection: Annual, April 4, 1988, 60 hours before
- Departed: CTB
- Destination: CTB
- Airport: CTB, Cut Bank Muni., runway 31, 5,300 × 75 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 40; private; airplane ratings: single-engine land; medical: class 3, valid medical--no waivers/lim.; seat: left; flight hours: 7,445 total, 57 in this make and model

## Weather

- Conditions: Visual (VMC), Day
- Wind: variable at 6 knots
- Visibility: 60 statute miles
- Lowest ceiling: none
- Temperature: 75 °F, dew point 37 °F
- Altimeter: 30.00 inHg
- Observed at: CTB, 1 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 19880512019379A](https://openairdocs.org/incident/19880512019379A), May 12, 1988: Amtrqk QUICKIE2, Cut Bank, MT, Substantial damage. Lacked acceleration on takeoff. Aborted too late and ran off end of runway. Misjudged density altitude and mixture.

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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