# NTSB LAX82FA195: Douglas DC10-10, N1833U, San Francisco, CA, May 27, 1982

- Type: NTSB accident investigation
- Classification: Accident · Minor injuries · Field investigation · Final report
- Date: May 26, 1982, 18:55 local (May 27, 1982, 01:55 UTC)
- Place: San Francisco, CA
- Coordinates: 37.780433, -122.420181 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=37.7804&lon=-122.4202&mi=10
- Phase of flight: [Pushback/towing](https://openairdocs.org/ntsb-phases/200) (OpenAirDocs' grouping)
- Highest injury: Minor injuries
- Injuries: 25 minor, 113 uninjured
- Status: Completed, report May 26, 1983
- Report: Approved by Office Director
- NTSB case key (mKey): 72493
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=LAX82FA195
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/72493/pdf
- Page: https://openairdocs.org/ntsb/LAX82FA195

## Sequence of events

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

- Nose gear collapsed, taxi - pushback/tow
  - landing gear,nose gear - overload
  - landing gear,nose gear - failure,total
  - airport facilities,ramp facilities - failure,total (cause)

## Analysis

DURING THE INITIAL PUSHBACK FROM THE GATE PRIOR TO ENG START A LOUD NOISE WAS HEARD & THE ACFT NOSE SLOWLY SETTLED ONTO THE TUG THAT WAS PERFORMING THE PUSHBACK. THE CAPTAIN ORDERED THE ACFT EVACUATED USING THE EMERGENCY SLIDES. THE UPPER JAW OF THE TOWBAR HAD FAILED DUE TO EXTENSIVE STRESS-CORROSION CRACKING. THIS FAILURE RESULTED IN THE TOWBAR IMPACTING THE NOSE LANDING GEAR CAUSING A FAILURE OF THE NOSE GEAR LOWER DRAG LINK UPPER CLEVIS. THE NOSE GEAR THEN COLLAPSED & THE ACFT SETTLED ONTO THE TUG.

## Aircraft

- Registration: N1833U (not matched to a registry record)
- Reported make and model: DOUGLAS DC10-10
- Category: Airplane
- Serial number: 47965
- Airframe hours: 26769
- Engines: GE CF6-6 39300 lbs thrust turbo fan
- Damage: Substantial damage
- Flight: Part 121
- Operator: United Airlines
- Registered owner: United Airlines
- Departed: SFO, SAN FRANCISCO, CA
- Destination: DEN, DENVER, CO
- Airport: SFO, San Francisco

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 53; airline transport; airplane ratings: multi-engine land, single-engine land; instrument ratings: airplane; medical: class 1, valid medical--w/ waivers/lim; flight hours: 19,515 total, 1,249 in this make and model, 5 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 270° at 12 knots
- Visibility: 12 statute miles
- Temperature: 140 °F

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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