# NTSB BFO85IA050: Douglas DC-10-30F, N106WA, Chantilly, VA, June 2, 1985

- Type: NTSB incident investigation
- Classification: Incident · No injuries · Incident investigation · Final report
- Date: June 2, 1985, 17:43 local (21:43 UTC)
- Place: Chantilly, VA
- Location: 38.8892° N, 77.4421° W: Placed by OpenAirDocs: center of Chantilly, VA, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=38.8892&lon=-77.4421&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 201 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 11151
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=BFO85IA050
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/11151/pdf
- Page: https://openairdocs.org/ntsb/BFO85IA050

## Sequence of events

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

- Airframe/component/system failure/malfunction, cruise - normal
  - flt control syst,aileron control - loose (cause)
  - maintenance,lubrication - not performed, company maintenance personnel (cause)
  - maintenance,aaip/progressive program - inadequate, faa(principal maintenance inspector) (cause)

## Analysis

AFTER CLIMBING UP TO AND LEVELING OFF AT 37,000 FEET, THE CREW OF THE DC-10-30F NOTICED THAT THE YORK CONTROL OF THE CAPTAIN AND THE FIRST OFFICER MOVED LATERALLY INDEPENDENTLY OF EACH OTHER FOR APPROXIMATELY TWO INCHES. AFTER MAKING AN UNSCHEDULED UNEVENTFUL LANDING AT DULLES THE LEFT AILERON CABLE TENSION REGULATOR ASSEMBLY WAS FOUND TO HAVE A DECREASE IN CABLE TENSION. AFTER LUBRICATION, THE UNIT JUMPED TO A POSITION WHICH PROVIDED PROPER CABLE TENSION BETWEEN THE CONTROL WHEEL AND THE AILERON CONTROL LOOP. THE OPERATOR CHANGED THEIR LUBRICATION PROGRAM ON THE ASSEMBLIES FROM 'ON CONDITION' TO EVERY 2500 HOURS WHICH EQUATES TO MORE THAN ONCE A YEAR.

## Aircraft

- Registration: N106WA (not matched to a registry record)
- Reported make and model: DOUGLAS DC-10-30F
- Category: Airplane
- Serial number: 46905
- Airframe hours: 22126
- Engines: GE CF6-50 17000 lbs thrust turbo jet
- Damage: No damage
- Flight: Part 121
- Registered owner: World Airways, Inc.
- Airworthiness certificate: Standard, Transport
- Departed: CHS, CHARLESTON, SC
- Destination: PHL, PHILADELPHIA, PA
- Flight plan: IFR
- Airport: IAD, Dulles International, runway 1B, 11,500 × 150 ft, concrete

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 42; airline transport; airplane ratings: multi-engine land; instrument ratings: airplane; medical: class 1, valid medical--w/ waivers/lim; seat: left; flight hours: 10,500 total, 4,200 in this make and model

## Weather

- Conditions: Visual (VMC), Day
- Visibility: 20 statute miles
- Temperature: 81 °F, dew point 64 °F
- Observed at: IAD

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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