# NTSB DEN83FA021: Mcdonald Douglas DC-10, N68056, Denver, CO, November 19, 1982

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Field investigation · Final report
- Date: November 18, 1982, 20:00 local (Nov 19, 1982, 03:00 UTC)
- Place: Denver, CO
- Coordinates: 39.689121, -104.81089 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=39.6891&lon=-104.8109&mi=10
- Phase of flight: [Standing](https://openairdocs.org/ntsb-phases/150) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 136 uninjured
- Status: Completed, report November 18, 1983
- Report: Approved by Office Director
- NTSB case key (mKey): 70460
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DEN83FA021
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/70460/pdf
- Page: https://openairdocs.org/ntsb/DEN83FA021

## Analysis

DURING THE TAXI FOR TAKEOFF, THE CREW NOTED A HYDRAULIC MALFUNCTION ON THE RIGHT MAIN GEAR AND RETURNED TO THE GATE FOR MAINTENANCE. THE AIRCRAFT WAS SHUT DOWN AND TURNED OVER TO THE MAINTENANCE CREW FOR REPAIR. THE PASSENGERS WERE NOT DEPLANED. DURING MAINTENANCE TROUBLESHOOTING PROCEDURES FOR THE HYDRAULIC LEAK, THE GEAR HANDLE WAS RAISED WITHOUT THE GEAR LOCKING PINS INSTALLED. THIS ALLOWED THE NOSE GEAR TO RETRACT AND THE NOSE SETTLED ONTO A PARKED TUG. INVESTIGATION REVEALED THAT THE APPLICABLE CHECKLIST WAS NOT USED AND POSITIVE COMMUNICATIONS WERE NOT ESTABLISHED BETWEEN THE MAINTENANCE PERSONNEL IN THE COCKPIT AND THOSE ON THE GROUND.

## Sequence of events

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

- Nose gear collapsed, standing - engine(s) not operating
  - landing gear,gear lever - deployed inadvertently (cause)
  - procedures/directives - not followed, company maintenance personnel (cause)

## Aircraft

- Registration: [N68056](https://openairdocs.org/deregistered/N68056-2009-09-30), registration cancelled 2009-09-30, S/N 47810, built 1975 (OpenAirDocs)
- Reported make and model: MCDONALD DOUGLAS DC-10
- Registry model: [Mcdonnell Douglas MD-10-10F](https://openairdocs.org/model/mcdonnell-douglas-md-10-10f) (registry code 3022112) (OpenAirDocs)
- Registry engine: [GE CF6-6D](https://openairdocs.org/engine/ge-cf6-6d) (registry code 30076, turbo-fan) (OpenAirDocs)
- Category: Airplane
- Serial number: 47810
- Engines: GEN.ELECTRIC CF6-5C 40000 lbs thrust turbo fan
- Damage: Substantial damage
- Flight: Part 121
- Operator: Continental Air Lines, Inc.
- Registered owner: Continental Air Lines, Inc.
- Departed: DENVER, CO
- Destination: CHICAGO, IL
- Flight plan: IFR
- Airport: Stapelton Int'L.

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; airline transport; airplane ratings: multi-engine land, single-engine land; instrument ratings: airplane; medical: class 1, valid medical--w/ waivers/lim

## Weather

- Conditions: Visual (VMC), Night/dark
- Visibility: 10 statute miles
- Temperature: 113 °F

## Other investigations on N68056 (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 LAX90FA148](https://openairdocs.org/ntsb/LAX90FA148), Apr 18, 1990: McDonnell Douglas DC-10-10F (N68056), Los Angeles, CA, substantial damage. Probable cause: PILOT FAILED TO ADHERE TO ESTABLISHED LANDING PROCEDURES, MAINTAIN A STABILIZED APPROACH, AND ALLOWED THE AIRSPEED TO GO BELOW THE PREDICTED V.

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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