B747 crew scraped #4 engine on the runway in nrt.

Attributes
ACN	470695
Time
Date	200004
Day	Sun
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : rjaa.airport
State Reference	FO
Altitude	agl single value : 0
Environment
Flight Conditions	Mixed
Weather Elements	Turbulence Windshear other
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	B747-100
Operating Under FAR Part	Part 121
Navigation In Use	ils localizer & glide slope : 16 other
Flight Phase	landing : roll
Route In Use	approach : instrument precision
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : flight engineer pilot : atp pilot : instrument
Experience	flight time last 90 days : 200 flight time total : 10000 flight time type : 1500
ASRS Report	470695
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : flight engineer pilot : atp
Experience	flight time last 90 days : 108 flight time total : 16000 flight time type : 4100
ASRS Report	470500
Events
Anomaly	conflict : ground critical ground encounters other inflight encounter : turbulence inflight encounter : weather inflight encounter other other anomaly
Independent Detector	other other : 4
Resolutory Action	none taken : detected after the fact
Consequence	other other other
Supplementary
Problem Areas	Flight Crew Human Performance Weather
Primary Problem	Flight Crew Human Performance

Narrative:

We were on approach to runway 16 at narita. There were reports of windshear +/-15 KTS. On short final the tower reported wind was 220 degrees at 14 KTS. Touchdown was normal and on rollout both aileron and rudder inputs were needed due to gusting winds to maintain runway centerline alignment. We assumed landing was uneventful and taxied to our parking spot. After performing postflt checks we were preparing to deplane when another crew member from a proceeding flight came on board and said he had observed a likely engine pod strike of our airplane after touchdown. We were totally unaware this had occurred. We went outside and observed signs of scrape damage to the underside of the #4 engine aft of the nacelle ring. The damage was entered into the aircraft maintenance log.

Original NASA ASRS Text

Title: B747 CREW SCRAPED #4 ENG ON THE RWY IN NRT.

Narrative: WE WERE ON APCH TO RWY 16 AT NARITA. THERE WERE RPTS OF WINDSHEAR +/-15 KTS. ON SHORT FINAL THE TWR RPTED WIND WAS 220 DEGS AT 14 KTS. TOUCHDOWN WAS NORMAL AND ON ROLLOUT BOTH AILERON AND RUDDER INPUTS WERE NEEDED DUE TO GUSTING WINDS TO MAINTAIN RWY CTRLINE ALIGNMENT. WE ASSUMED LNDG WAS UNEVENTFUL AND TAXIED TO OUR PARKING SPOT. AFTER PERFORMING POSTFLT CHKS WE WERE PREPARING TO DEPLANE WHEN ANOTHER CREW MEMBER FROM A PROCEEDING FLT CAME ON BOARD AND SAID HE HAD OBSERVED A LIKELY ENG POD STRIKE OF OUR AIRPLANE AFTER TOUCHDOWN. WE WERE TOTALLY UNAWARE THIS HAD OCCURRED. WE WENT OUTSIDE AND OBSERVED SIGNS OF SCRAPE DAMAGE TO THE UNDERSIDE OF THE #4 ENG AFT OF THE NACELLE RING. THE DAMAGE WAS ENTERED INTO THE ACFT MAINT LOG.

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.