DEN06IA068

NTSB incident investigation · Boeing 747-400 · Denver, CO · April 23, 2006

Incident · No injuriesIncident investigationFinal report
Date
April 23, 2006, 16:33 local (22:33 UTC)
Place
Denver, CO
Injuries
401 uninjured
Damage
Minor damage
Phase of flight
Taxi
Aircraft
DABVNBoeing 747-400
Weather
Visual (VMC) · Day
Status
Completed · report July 25, 2007
Report
Approved by Office Director
Parties
FAA Flight Standards District Office
Case key
63583

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

The ground crew's failure to retract the adjacent jetway and to verify the airplane's clearance with the jetway as it taxied.

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.

On ground/water collision with objectTaxi - from landing
Object - airport facilityFactor
Clearance - not maintainedPilot in commandCause
Procedures/directives - not followedCompany/operator managementFactor

Analysis

The Boeing 747-400 was taxiing to the gate following landing. The adjacent jetway had not been retracted completely after it was last used. As the airplane approached its jetway, the airplane's number 1 engine struck the adjacent jetway causing scraping, dents, and puncture damage to the engine nacelle.

Factual narrative

On April 23, 2006, at 1633 mountain daylight time, a Boeing 747-400, DABVN, operated by Lufthansa German Airlines and piloted by an airline transport certificated pilot, sustained minor damage when it collided with a jetway while taxiing to its gate at Denver International Airport (DEN), Denver, Colorado. Visual meteorological conditions prevailed at the time of the incident. The scheduled foreign passenger flight was being conducted under the provisions of Title 14 CFR Part 129 under an instrument flight rules flight plan. The captain, first officer, relief captain, 16 flight attendants, and 382 passengers were not injured. The transoceanic flight originated in Frankfurt, Germany, at an undetermined time, and had landed at its destination when the incident occurred.

The station manager reported that Flight 446 was taxiing into gate A41. The jetway for the adjacent gate, gate A43, had not been retracted after its last usage. The airplane's number 1 engine struck the A43 jetway. An examination of the airplane revealed the number 1 engine nacelle had been scraped, dented, and punctured.

Following the incident, Lufthansa revised their station manual procedures to position two additional marshalling wing walkers so as to prevent a recurrence of this type incident.

Aircraft

Registration
DABVN
Reported as
Boeing 747-400
Category
Airplane
Serial number
RT441
Airframe hours
74,199
Engine
General Electric CF6-80, turbo fan
Damage
Minor damage
Flight
Part 129
Registered owner
Lufthansa German Airlines
Airworthiness certificate
Standard, Transport
Departed
FRA · Frankfurt
Destination
DEN · Denver, CO
Flight plan
IFR
Airport
DEN · Denver International

Flight crew · 2

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
56
Injuries
None
Certificate
Airline transport
Airplane ratings
Multi-engine land
Instrument ratings
Airplane
Last flight review
March 1, 2006
Seat
Left
Flight hours
19,635 total · 234 in the last 90 days
Role
Co-pilot
Age
37
Injuries
None
Certificate
Airline transport
Airplane ratings
Multi-engine land
Instrument ratings
Airplane
Last flight review
January 1, 2006
Seat
Right
Flight hours
7,463 total · 294 in the last 90 days

Weather

Conditions
Visual (VMC) · Day
Wind
170° at 10 knots
Visibility
10 statute miles
Lowest ceiling
30,000 ft broken
Temperature
84 °F, dew point 61 °F
Altimeter
29.86 inHg
Observed at
DEN