ACR WDB; A 747; SUFFERS ACTUAL LOSS OF #1 ENG WHEN IT DETACHES FROM WING DURING LNDG PROC ROLLOUT REVERSING.

Narrative

DURING A NORMAL APCH AND LNDG (CAPT'S LEG) THE #1 REVERSE ABRUPTLY RETURNED TO THE FULL REVERSE POS AT 90 KTS. THE FUEL FLOW PEGGED OFF THE SCALE; N1 AND N2 BEGAN WINDING DOWN. I ADVISED THE CAPT THAT #1 APPEARED TO BE FLAMED OUT. HE IMMEDIATELY SECURED THE ENG WITH FUEL SHUTOFF SWITCH AND CONTINUED TO CTL THE ACFT AND TURNED OFF THE RWY AT A2. AT THAT POINT; NARITA TWR XMITTED ' YOU HAVE SMOKE.' AS WE TURNED ONTO THE PARALLEL TXWY; I CONFIRMED THE SMOKE AND SIGHTED A GRASS FIRE ALONG THE OUTSIDE OF THE RWY. I THEN CALLED FOR FIREFIGHTING EQUIP AS THE CAPT STOPPED THE ACFT. THE INTERPHONE RANG AND THE SO ANSWERED IT; BUT NO ONE RESPONDED. HE HUNG UP THE INTERPHONE AND IT IMMEDIATELY RANG AGAIN. THIS TIME A FLT ATTENDANT ANNOUNCED THAT THERE WAS SMOKE ON THE #1 ENG. WE COMPLETED THE ENG FIRE FAILURE CHKLIST FOR #1 ENG AND SHUT DOWN THE #2 NORMALLY AS THE FIREFIGHTING APCHED THE ACFT. AT NO TIME WAS THERE ANY INDICATION OF FIRE IN THE COCKPIT. WE EVEN CHKED THE CONTINUITY OF THE FIRE DETECTION SYS. AFTER A SERIES OF COMS WITH THE TWR AND COMPANY; WE FINALLY DETERMINED THAT THE ENG HAD SEPARATED FROM THE ACFT AND COORDINATED WITH THE COMPANY FOR STAIRS AND BUSES. DURING THIS TIME; WE MAINTAINED COMS WITH THE LEAD FLT ATTENDANT AND THE CAPT MADE A PA TO REMAIN SEATED AND STAY CALM. WE THEN MADE AN ANNOUNCEMENT TO DEPLANE THE ACFT THROUGH DOORS 1R AND 2R. NO ONE WAS INJURED.