Postflt inspection reveals that aircraft had been involved with a ground vehicle.

Attributes
ACN	236403
Time
Date	199303
Day	Tue
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : iad airport : sfo
State Reference	CA
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	IMC
Light	Night
Aircraft 1
Controlling Facilities	tower : bwi
Operator	common carrier : air carrier
Make Model Name	Widebody, Low Wing, 4 Turbojet Eng
Navigation In Use	Other
Flight Phase	ground : preflight ground : parked
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : commercial pilot : instrument
Experience	flight time last 90 days : 200 flight time total : 17000 flight time type : 600
ASRS Report	236403
Person 2
Affiliation	company : air carrier
Function	flight crew : second officer
Qualification	pilot : commercial pilot : flight engineer pilot : instrument
ASRS Report	236409
Events
Anomaly	conflict : ground critical
Independent Detector	other other : unspecified
Resolutory Action	none taken : detected after the fact
Consequence	other
Supplementary
Primary Problem	Airport
Air Traffic Incident	other

Narrative:

After an uneventful flight from iad to sfo, maintenance came on board after engine shutdown and told us we had #4 engine damage. There was a hold about a ft across on outboard side of engine and the lower edge of cowling was flattened by something heavy like a truck. None of the flight crew have any knowledge how this damage was done.

Original NASA ASRS Text

Title: POSTFLT INSPECTION REVEALS THAT ACFT HAD BEEN INVOLVED WITH A GND VEHICLE.

Narrative: AFTER AN UNEVENTFUL FLT FROM IAD TO SFO, MAINT CAME ON BOARD AFTER ENG SHUTDOWN AND TOLD US WE HAD #4 ENG DAMAGE. THERE WAS A HOLD ABOUT A FT ACROSS ON OUTBOARD SIDE OF ENG AND THE LOWER EDGE OF COWLING WAS FLATTENED BY SOMETHING HVY LIKE A TRUCK. NONE OF THE FLC HAVE ANY KNOWLEDGE HOW THIS DAMAGE WAS DONE.

Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.