- Date
- June 11, 2011, 17:58 local (Jun 12, 2011, 00:58 UTC)
- Place
- San Fransico, CA
- Injuries
- 190 uninjured
- Damage
- Substantial damage
- Phase of flight
- Pushback/towing
- Aircraft
- N571UABoeing 757-222
- Defining event
- Pushback/tow-engine not oper: Ground handling event
- Weather
- Visual (VMC) · Day
- Status
- Completed · report August 31, 2011
- Report
- Approved by Office Director
- NTSB office
- Major Investigations Division
- Parties
- United Airlines
- Case key
- 80839
From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.
On this page
Probable cause
The ramp personnel's failure to visually verify the position of the jetway before beginning the airplane pushback.
Findings · 1
NTSB’s coded findings. Those marked are part of the probable cause; the rest are factors or other findings. Under each, the cases with the same finding.
Sequence of events
The events NTSB coded, in order, by phase of flight. The defining event is the one that best describes the accident. Under each, the cases with the same event anywhere in their sequence.
Analysis
On June 16, 2011 at approximately 1758 pacific daylight time, United flight 818, a Boeing 757-200, registration N571UA, was substantially damaged during initial pushback from gate 73 at San Francisco International Airport (SFO), San Francisco, California. There were no injuries to the 188 passengers and crew onboard. The flight was a regularly scheduled domestic passenger flight from SFO to Chicago O'Hare International Airport, Chicago, Illinois. United representatives reported that normal passenger and crew boarding was accomplished using door 2L. The passenger loading bridge (PLB) operator stated she was in position at the loading bridge controls and was prepared to retract the bridge. She reported that the airplane door was closed and the loading bridge canopy was retracted. The PLB operator stated she was waiting for hand signal guidance from the ramp personnel to retract the bridge from the airplane. The PLB operator stated the signal to retract the bridge from the airplane was not received, however, the ramp personnel proceeded to push back the airplane. The ramp employee responsible for the airplane pushback reported that he heard the PLB bell ringing for about one minute, which he thought was enough time for the jetway to be cleared from the airplane. He reported that he then removed the chalks, received clearance from the flight crew, and then commenced to push back the airplane. As a result of the impact with the jetway, the airplane received a 38 inch x 8.5 inch hole in the fuselage between Fuselage Station (FS) 490 and FS 528 and stringer S-17L and S-18L resulting in damage to frame assemblies and stringers in this area.
Factual narrative
On June 16, 2011 at approximately 1758 pacific daylight time, United flight 818, a Boeing 757-200, registration N571UA, was substantially damaged during initial pushback from gate 73 at San Francisco International Airport (SFO), San Francisco, California. There were no injuries to the 188 passengers and crew onboard. The flight was a regularly scheduled domestic passenger flight from SFO to Chicago O'Hare International Airport, Chicago, Illinois. United representatives reported that normal passenger and crew boarding was accomplished using door 2L. The passenger loading bridge (PLB) operator stated she was in position at the loading bridge controls and was prepared to retract the bridge. She reported that the airplane door was closed and the loading bridge canopy was retracted. The PLB operator stated she was waiting for hand signal guidance from the ramp personnel to retract the bridge from the airplane. The PLB operator stated the signal to retract the bridge from the airplane was not received, however, the ramp personnel proceeded to push back the airplane. The ramp employee responsible for the airplane pushback reported that he heard the PLB bell ringing for about one minute, which he thought was enough time for the jetway to be cleared from the airplane. He reported that he then removed the chalks, received clearance from the flight crew, and then commenced to push back the airplane. As a result of the impact with the jetway, the airplane received a 38 inch x 8.5 inch hole in the fuselage between Fuselage Station (FS) 490 and FS 528 and stringer S-17L and S-18L resulting in damage to frame assemblies and stringers in this area.
Aircraft
- Registration
- N571UA
- Reported as
- Boeing 757-222
- Category
- Airplane
- Serial number
- 26681
- Airframe hours
- 61,787
- Engines
- P & W PW2040, 40,900 lbs thrust, turbo jetP & W PW2040, 40,900 lbs thrust, turbo jet
- Damage
- Substantial damage
- Flight
- Part 121
- Operator
- United Air Lines Inc
- Registered owner
- United Air Lines Inc
- Airworthiness certificate
- Standard, Transport
- Last inspection
- Continuous airworthiness · May 25, 2011
- Departed
- KSFO · San Fransico, CA
- Destination
- KORD · Chicago, IL
- Flight plan
- IFR
- Airport
- KSFO · San Francisco International
Flight crew · 2
As NTSB recorded them. NTSB leaves out names.
- Role
- Pilot
- Age
- 54
- Injuries
- None
- Certificates
- Commercial, Airline transport
- Airplane ratings
- Multi-engine sea, Multi-engine land, Single-engine land
- Instrument ratings
- Airplane
- Medical
- Class 1, Unknown
- Last flight review
- February 1, 2011
- Seat
- Left
- Flight hours
- 13,678 total · 2,949 in this make and model
- Role
- Co-pilot
- Age
- 46
- Injuries
- None
- Certificate
- Airline transport
- Airplane ratings
- Multi-engine land, Single-engine land
- Instrument ratings
- Powered-lift
- Medical
- Class 1, Unknown
- Last flight review
- May 1, 2011
- Seat
- Right
- Flight hours
- 4,907 total · 3,574 in this make and model
Weather
- Conditions
- Visual (VMC) · Day
- Wind
- 315° at 13 knots
- Visibility
- 10 statute miles
- Temperature
- 63 °F, dew point 46 °F