# NTSB LAX84IA351: Mcdonnell Douglas DC-10-10, N1806U, Los Angeles, CA, June 10, 1984

- Type: NTSB incident investigation
- Classification: Incident · No injuries · Incident investigation · Final report
- Date: June 10, 1984, 14:02 local (21:02 UTC)
- Place: Los Angeles, CA
- Coordinates: 33.949893, -118.400535 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=33.9499&lon=-118.4005&mi=10
- Phase of flight: [Initial climb](https://openairdocs.org/ntsb-phases/350) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 212 uninjured
- Status: Completed, report August 30, 1994
- Report: Approved by Office Director
- NTSB case key (mKey): 24045
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=LAX84IA351
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/24045/pdf
- Page: https://openairdocs.org/ntsb/LAX84IA351

## Sequence of events

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

- Airframe/component/system failure/malfunction, takeoff - initial climb
  - flt control syst,wing spoiler system - corroded (cause)
  - flt control syst,wing spoiler system - movement restricted (cause)
  - precautionary landing - performed, pilot in command

## Analysis

THE PILOTS WERE UNABLE TO RETRACT THE RIGHT WING SPOILERS AFTER TAKEOFF, SO THEY RETURNED TO THE DEPARTURE AIRPORT FOR AN UNEVENTFUL LANDING.  AN INSPECTION REVEALED RUST & DEBRIS IN THE AREA OF THE BELLCRANK, WHICH PREVENTED THE #1, #4 & #5 RGT HAND SPOILERS FROM RETRACTING.  THE SPOILERS REMAINED EXTENDED 4 TO 5 INCHES.

## Aircraft

- Registration: N1806U (not matched to a registry record)
- Reported make and model: MCDONNELL DOUGLAS DC-10-10
- Category: Airplane
- Serial number: 46605
- Airframe hours: 34026
- Engines: GE CF6-6D 40000 lbs thrust turbo fan
- Damage: No damage
- Flight: Part 121
- Registered owner: United Airlines
- Airworthiness certificate: Standard, Transport
- Departed: LAX, LOS ANGELES, CA
- Destination: IAD, WASHINGTON, DC
- Flight plan: IFR
- Airport: LAX, Los Angeles Int'L, runway 25, 1,209 × 150 ft, concrete

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 58; airline transport; airplane ratings: multi-engine land, single-engine land; instrument ratings: airplane; medical: class 1, valid medical--w/ waivers/lim; seat: left; flight hours: 21,000 total, 800 in this make and model

## Weather

- Conditions: Visual (VMC), Day
- Wind: 270° at 7 knots
- Visibility: 10 statute miles
- Lowest ceiling: none
- Temperature: 75 °F, dew point 55 °F
- Altimeter: 29.00 inHg
- Observed at: LAX

## 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 19840610029439I](https://openairdocs.org/incident/19840610029439I), Jun 10, 1984: Doug DC1010, Los Angeles, CA. Unable to fully retract part of spoilers after takeoff. Dumped fuel and returned. Rust and debris in bellcrank area

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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