# NTSB DEN82IA103: Grumman G-159C, N159AN, Gillette, WY, June 8, 1982

- Type: NTSB incident investigation
- Classification: Incident · No injuries · Incident investigation · Final report
- Date: June 8, 1982, 17:24 local (23:24 UTC)
- Place: Gillette, WY
- Coordinates: 44.460563, -105.699989 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=44.4606&lon=-105.7000&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 29 uninjured
- Status: Completed, report June 8, 1983
- Report: Approved by Office Director
- NTSB case key (mKey): 70829
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DEN82IA103
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/70829/pdf
- Page: https://openairdocs.org/ntsb/DEN82IA103

## Sequence of events

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

- Loss of control - on ground/water, landing - roll
  - weather condition - crosswind (contributing factor)
  - weather condition - gusts (contributing factor)
  - airport facilities,runway/landing area condition - wet (contributing factor)
  - directional control - not maintained, copilot/second pilot (cause)
  - ground loop/swerve - inadvertent, copilot/second pilot
  - supervision - inadequate, pilot in command (cause)

## Analysis

THE ACFT WAS ON A SCHEDULED, DOMESTIC, PAX FLT. THE COPLT WAS THE COMPANY'S CHIEF PLT AND WAS FLYNG THE ACFT FROM THE LEFT SEAT. HE WAS UNDER SUPERVISION OF THE PILOT-IN-COMMAND (PIC) WHO WAS IN THE RT SEAT. DRG ARRIVAL, THE CREW ELECTED TO MAKE A LOCALIZER-ONLY APCH TO RWY 33 WHICH WAS WET. JUST PRIOR TO LNDG, THE WIND WAS REPORTED FROM 280 DEG AT 15 KNTS. (ACCORDING TO AN OFFICIAL WX OBS AT 1736 MDT, THE WIND WAS FROM 290 DEG AT 17, GSTG 25 KTS.) REPORTEDLY, THE LNDG APCH & TCHDWN WERE NORMAL. AT APRX 90 KTS, GROUND FIND FINE PITCH (GFP) WAS SELECTED & THE ACFT VEERED TO THE LEFT. NOSE WHL STEERING & RUDDER WERE RPRTD AS NIL. THE PIC ASSUMED CONTROL, BUT THE ACFT WENT OFF THE LEFT SIDE OF THE RWY BFR HE WAS ABLE TO STOP THE SWERVE AND PARALLEL THE RWY. THERE WAS NO DNG OR INJURY. DURING AN INVESTIGATION, THE LEFT ENGINE WAS FOUND TO IDLE AT 8000 RPM, THE RGT ENGINE IDLED AT 9000 RPM. THE RECOMMENDED IDLE SPEED WAS 6500 TO 7500 RPM.

## Aircraft

- Registration: N159AN (not matched to a registry record)
- Reported make and model: GRUMMAN G-159C
- Category: Airplane
- Serial number: 116
- Airframe hours: 12181
- Engines: ROLLS ROYCE DART 529-8Z 2000 horsepower turbo prop
- Damage: No damage
- Flight: Part 121
- Operator: U.S. Aviation, Inc.
- Registered owner: Gulfstream American Corporatio
- Departed: SHR, SHERIDAN, WY
- Flight plan: IFR
- Airport: GCC, Gilette-Campbell County, runway 33, 6,507 × 75 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 37; airline transport; airplane ratings: multi-engine land, single-engine land; instrument ratings: airplane; medical: class 1, valid medical--no waivers/lim.; flight hours: 5,000 total, 500 in this make and model, 4,000 as pilot in command, 100 in the last 90 days, 15 in the last 30 days, 1 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 280° at 15 knots
- Visibility: 20 statute miles
- Lowest ceiling: 1,100 ft broken
- Temperature: 108 °F
- Altimeter: 30.00 inHg
- Observed at: GCC

## FAA reports on this event (1)

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

- [Incident 19820608070739I](https://openairdocs.org/incident/19820608070739I), Jun 8, 1982: Gulstm G159, Gillette, WY. Veered off the runway on the landing roll. Crosswind near limits and after touchdown procedures are factors.

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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