DEN05IA071

NTSB incident investigation · Boeing 737-282 · Denver, CO · April 25, 2005

Incident · No injuriesIncident investigationFinal report
Date
April 25, 2005, 11:05 local (17:05 UTC)
Place
Denver, CO
Injuries
98 uninjured
Damage
Minor damage
Phase of flight
Taxi
Aircraft
N789TMBoeing 737-282
Weather
Visual (VMC) · Day
Status
Completed · report December 20, 2005
Report
Approved by Office Director
Parties
Federal Aviation Administration
Case key
61389

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

On this page

Probable cause

the improper operation of the loading bridge which resulted in the loading bridge impacting the airplane. Contributing factors were the failure of the ground personnel to marshal the airplane on the assigned aircraft stop line, lack of supervision and communications during the marshal operations, the lack of qualified personnel conducting the marshal operations, and the inadequate training of ground personnel.

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
Procedures/directives - improperGround personnelCause
Aircraft handling - improperGround personnelCause
Supervision - inadequateGround personnelFactor
Object - airport facility
Communications - not performedGround personnelFactor
QualificationGround personnelFactor
Inadequate trainingGround personnelFactor

Analysis

This case was modified December 2, 2008.

The airplane was being marshalled to the gate by another operator's ground personnel. The ground personnel marshalled the airplane onto the "727" stop bar line, which was located approximately 25 feet forward of the "737" stop bar line. After the airplane was parked, the loading bridge operator maneuvered the loading bridge toward the airplane, and the loading bridge impacted the airplane's left engine pylon fairing. At the time of the incident, the loading bridge wheels were positioned within the painted hash-mark box. The ground operations investigation report stated, "A complete lack of communication among interested parties accompanied by the assigning unqualified agents and a lack of direct supervision was the major cause of this accident. The Supervisor on Duty also directed the marshaller to bring the [aircraft] up to the 727 stop block which is approximately 25-30 feet forward of the 737 stop block. This was only communicated to the marshaller and not to anyone else. The supervisor was not in attendance during the arrival of the [aircraft]." The marshalling of the flight was an irregular operation for the ground personnel which normally handles regional jets.

Factual narrative

This case was modified December 2, 2008

On April 25, 2005, approximately 1105 mountain daylight time, Casino Express flight 211, a Boeing 737-282, N789TM, sustained minor damage when the loading bridge contacted the airplane when it was parked at the gate at Denver International Airport (DEN), Denver, Colorado. None of the 92 passengers, 6 crew members, or ground personnel was injured. The flight was conducted under Title 14 Code of Federal Regulations Part 121 on an instrument flight rules flight plan. The flight originated at Wendover Airport (ENV), in Wendover, Utah, approximately 0930.

According to the flight crew, the airplane was marshalled to gate A52 by Frontier Airlines ground operations. The ground personnel marshalled the airplane onto the "727" stop bar line, which was located approximately 25 feet forward of the "737" stop bar line. After the airplane was parked, the loading bridge operator maneuvered the loading bridge toward the airplane, and the loading bridge impacted the airplane's left engine pylon fairing. At the time of the incident, the loading bridge wheels were positioned within the painted hash-mark box. The flight crew was unaware that the loading bridge impacted the airplane until they were alerted by the cabin crew.

According to the Frontier Airlines Ground Accident/Incident Investigation Report, "A complete lack of communication among interested parties accompanied by the assigning unqualified agents and a lack of direct supervision was the major cause of this accident. The Supervisor on Duty also directed the marshaller to bring the [aircraft] up to the 727 stop block which is approximately 25-30 feet forward of the 737 stop block. This was only communicated to the marshaller and not to anyone else. The supervisor was not in attendance during the arrival of the [aircraft]."

The report stated the ground marshalling of the Casino Express flight was an irregular operation for the Frontier Jet Express team which normally handles regional jets.

Aircraft

Registration
N789TM
Reported as
Boeing 737-282
Category
Airplane
Serial number
23046
Engine
Pratt & Whitney JT8D-17A, turbo jet
Damage
Minor damage
Flight
Part 121
Registered owner
Tem Enterprises Inc
Airworthiness certificate
Standard, Normal
Departed
ENV · Wendover, UT
Destination
DEN · Denver, CO
Flight plan
IFR
Airport
DEN · Denver Intl

Matched to the registry by N-number and the event date; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.

Flight crew · 2

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
51
Injuries
None
Certificates
Commercial, Airline transport
Airplane ratings
Single-engine land, Multi-engine land
Instrument ratings
Airplane
Medical
Class 1, Without waivers/limitations
Last flight review
December 1, 2004
Seat
Left
Flight hours
16,000 total · 4,000 in this make and model · 16,000 as pilot in command
Role
Co-pilot
Age
41
Injuries
None
Certificates
Flight instructor, Airline transport, Commercial
Airplane ratings
Single-engine land, Multi-engine land
Instrument ratings
Airplane
Medical
Class 1, Without waivers/limitations
Last flight review
March 1, 2005
Seat
Right
Flight hours
9,461 total · 50 in this make and model · 6,992 as pilot in command

Weather

Conditions
Visual (VMC) · Day
Wind
30° at 26 knots, gusting 30
Visibility
10 statute miles
Lowest ceiling
6,000 ft broken
Temperature
52 °F, dew point 34 °F
Altimeter
29.84 inHg
Observed at
DEN