FTW95IA023

NTSB incident investigation · Mcdonnell Douglas MD-11 · Dfw Airport, TX · October 14, 1994

Incident · No injuriesIncident investigationFinal report
Date
October 13, 1994, 21:31 local (Oct 14, 1994, 02:31 UTC)
Place
Dfw Airport, TX
Injuries
2 uninjured
Damage
No damage
Phase of flight
Initial climb
Aircraft
N1758BMcdonnell Douglas MD-11
Weather
Visual (VMC) · Night/dark
Status
Completed · report May 18, 1995
Report
Approved by Office Director
FAA report
19941013039519I
Case key
19259

From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the incident.

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Probable cause

Improper maintenance by unknown persons resulting in a jammed spoiler. A factor was the reversed aileron fitting.

Sequence of events

NTSB’s coding before 2008: each occurrence and phase of flight, and the causes and factors under it. The codes are defined in NTSB’s coding manual.

Airframe/component/system failure/malfunctionTakeoff - initial climb
Maintenance,installation - improperUnknownCause
Flight control,aileron attachment - reversedFactor
Flt control syst,wing spoiler system - jammed

Analysis

During initial climb after takeoff the aircraft experienced a right roll and yaw. The crew arrested the yaw and roll and returned to the departure airport. Following the landing, an inspection revealed that the right hand spoiler control arm had become entangled in the right aileron cable bus guard. Further examination of the aileron bus guard and a review of the engineering drawings revealed that the cable bus guard had been installed incorrectly (reversed 180 degrees from the correct installation).

Factual narrative

On October 13, 1994, at 2131 central daylight time, a McDonnell Douglas MD-11, N1758B, experienced a flight control malfunction during takeoff at Dallas/Fort Worth International Airport, (DFW) Texas. The airplane, owned by American Airlines, Inc., and operated by U. S. Africa Airways, was departing on a ferry flight to Washington's Dulles Airport. An IFR flight plan was filed and in effect and visual meteorological conditions prevailed. Neither of the two crewmembers were injured.

According to the crew, they experienced a right roll and yaw at liftoff. They were able to control the adverse control effects and elected to return to the airport where an uneventful landing was made. As the airplane was taxiing to the maintenance hangar, maintenance personnel noticed that spoiler numbers 1, 4, and 5, were deployed on the right wing. Prior to this flight a "B" check had been completed on the airplane during which a left hand aileron tension regulator had been removed and replaced. Post- incident inspection revealed that the right hand spoiler control arm had become entangled in the right aileron cable bus guard. It was determined that the cable guard had been installed backwards following the aileron cable maintenance.

Repeated attempts to obtain a Pilot/Operator report, NTSB Form 6120.1/2 was unsuccessful due to the company going out of business.

Aircraft

Registration
N1758B
Reported as
Mcdonnell Douglas MD-11
Category
Airplane
Serial number
48527
Airframe hours
8,642
Engine
GE CF680C2D-1F, 62,504 lbs thrust, turbo fan
Damage
No damage
Flight
Ferry · Part 91
Operator
U. S. Africa Airways
Registered owner
American Airlines
Airworthiness certificate
Standard, Transport
Last inspection
Continuous airworthiness · October 13, 1994
Destination
IAD · Washington, DC
Flight plan
IFR
Airport
DFW · Dfw Airport, runway 36, 11,388 × 150 ft, concrete

Flight crew

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
47
Certificate
Airline transport
Airplane ratings
Multi-engine land, Single-engine land
Instrument ratings
Airplane
Medical
Class 1, Valid Medical--no waivers/lim.
Seat
Left
Flight hours
13,100 total

Weather

Conditions
Visual (VMC) · Night/dark
Wind
330° at 18 knots, gusting 25
Visibility
20 statute miles
Lowest ceiling
None
Temperature
59 °F, dew point 27 °F
Altimeter
29.00 inHg
Observed at
DFW

FAA reports on this event · 1

The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.