# NTSB ATL90LA052: Aero Commander 680E, N612G, Knoxville, TN, January 18, 1990

- Type: NTSB accident investigation
- Classification: Accident · Serious injuries · Limited investigation · Final report
- Date: January 18, 1990, 10:05 local (15:05 UTC)
- Place: Knoxville, TN
- Location: 35.9638° N, 83.8737° W: Placed by OpenAirDocs at KNOXVILLE DOWNTOWN ISLAND (DKX), within about a mile (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=35.9638&lon=-83.8737&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: Serious injuries
- Injuries: 3 serious
- Status: Completed, report December 4, 1992
- Report: Approved by Office Director
- NTSB case key (mKey): 8200
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ATL90LA052
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/8200/pdf
- Page: https://openairdocs.org/ntsb/ATL90LA052

## Probable cause

THE PILOT'S EXCESSIVE AIRSPEED AND DELAY IN INITIATING A GO-AROUND DURING THE LANDING.  FACTORS RELATED TO THE ACCIDENT WERE: THE WET RUNWAY CONDITION, THE PILOT'S FAILURE TO ATTAIN THE PROPER TOUCHDOWN POINT FOR THE LANDING, AND HIS LACK OF FLYING EXPERIENCE IN THE TYPE OF AIRCRAFT.

## Sequence of events

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

- Overrun, landing - roll
  - airport facilities,runway/landing area condition - wet (contributing factor)
  - proper touchdown point - not attained, pilot in command (contributing factor)
  - airspeed - excessive, pilot in command (cause)
  - go-around - delayed, pilot in command (cause)
  - aborted landing - not attained, pilot in command
  - lack of total experience in type of aircraft, pilot in command (contributing factor)
- On ground/water encounter with terrain/water, landing - roll
  - terrain condition - rough/uneven (contributing factor)

## Analysis

AFTER BREAKING OUT HIGH ON A LOCALIZER RWY 26 APCH, THE PLT ELECTED TO CIRCLE FOR LNDG ON RWY 8. HE RPRTD THAT THE ACFT TOUCHED DOWN ON THE 1ST QTR OF THE 3497' RWY, BUT WITNESSES RPRTD IT LNDD ABOUT MIDWAY DOWN THE RWY. THE ESTD LNDG WT WAS 7000 LBS. THE WINDS WERE RPRTD FM 240 DEG AT 5 KTS. AFTER TOUCHDOWN, THE PLT BELIEVED THE ACFT WAS HYDROPLANING. HE WAS UNCERTAIN THAT HE COULD STOP THE ACFT ON THE REMAINING RWY & ATMTD A GO-ARND. HE RAISED FLAPS TO THE 1/4 PSN & ADVANCED THE THROTTLES. THE PLT STATED THAT THE LEFT ENG DID NOT IMMEDIATELY RESPOND & THE ACFT DRIFTED TO THE LEFT. HE THEN ATMTD TO STOP THE ACFT ON THE RWY, BUT IT ANGLED OFF THE RWY NR THE DEP END. SUBSEQUENTLY, THE ACFT IMPACTED ROUGH TRRN AT A RIVER BANK BYD THE END OF THE RWY & WAS SUBSTANTIALLY DMGD. THE PLT HAD ABOUT 43 HRS OF MULTI-ENG EXPERIENCE WITH 28 HRS FLT TIME IN THE ACDNT ACFT.

## Aircraft

- Registration: [N612G](https://openairdocs.org/deregistered/N612G-2013-04-26), registration cancelled 2013-04-26, S/N 680-356-45, built 1956 (OpenAirDocs)
- Reported make and model: AERO COMMANDER 680E
- Registry model: [Aero Commander 680-E](https://openairdocs.org/model/aero-commander-680-e) (registry code 0141604) (OpenAirDocs)
- Registry engine: [Lycoming GSO&IGSO-480 series](https://openairdocs.org/engine/lycoming-gso-igso-480-series) (registry code 41529, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 68035645
- Airframe hours: 7440
- Engines: LYCOMING GSO-480-B1A6 340 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Registered owner: James A. Shields
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, December 1, 1989, 30 hours before
- Departed: RNC, MCMINNVILLE, TN
- Flight plan: IFR
- Airport: DKX, Knoxville Downtown Island, runway 8, 3,497 × 75 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 29; commercial, flight instructor; airplane ratings: multi-engine land, single-engine land; instrument ratings: airplane; medical: class 2, valid medical--no waivers/lim.; seat: left; toxicology performed; flight hours: 409 total, 28 in this make and model, 358 as pilot in command, 86 in the last 90 days, 1 in the last 24 hours

## Weather

- Conditions: Instrument (IMC), Day
- Wind: 240° at 5 knots
- Visibility: 2 statute miles
- Lowest ceiling: 800 ft overcast
- Temperature: 57 °F, dew point 57 °F
- Altimeter: 30.00 inHg
- Observed at: TYS, 12 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 19900118000729A](https://openairdocs.org/incident/19900118000729A), Jan 18, 1990: Gulstm 680E, Knoxville, TN, Substantial damage. Landed long and fast on wet runway,hydroplaned. Tried go around but over boosted engines. Ran off end. Cocaine 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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