A SABERLINER-65 AT FL210 IN DSCNT EXPERIENCED THE L MAIN LNDG GEAR OUTER DOOR DEPART THE ACFT STRIKING THE L ENG LOWER COWLING SEVERING 3 ENG OIL LINES CAUSING LOSS OF OIL AND ENG SHUTDOWN.

Narrative

WE WERE DSNDING AT NORMAL DSCNT SPD ON THE VALRE TWO ARR TO LAND AT HPN; WHEN WE HEARD A 'THUD.' IMMEDIATELY THE L ENG 'OIL PRESSURE LOW' LIGHT CAME ON. THE OIL PRESSURE GAUGE WAS FALLING THROUGH 20 PSI AND HEADING RAPIDLY TOWARD ZERO. WE SHUT DOWN THE L ENG; DECLARED AN EMER; ADVISING ATC THE L ENG WAS SHUT DOWN; AND REQUESTED VECTORS TO BDL. (A LINE OF TSTMS WAS APCHING HPN; AND I WAS CONCERNED IT WOULD BE TOO CLOSE.) I USED THE SHORT ENRTE TIME TO ACCOMPLISH THE APPROPRIATE CHKLISTS AND ADVISE THE PAX. I REQUESTED FIRE EQUIP BE STANDING BY AT BDL. WE FLEW OVER THE ARPT FOR A L DOWNWIND PATTERN AND A SUCCESSFUL LNDG ON RWY 24. UPON EXAMINATION; WE DISCOVERED THAT THE OUTER; L MAIN GEAR DOOR HAD BROKEN LOOSE; PUNCTURED THE INBOARD SIDE OF THE L ENG COWLING; RUPTURING 3 METAL OIL LINES. GEAR EXTENSION HAD BEEN NORMAL. ALTHOUGH VERY BUSY HANDLING THIS EMER; ALL WENT SMOOTHLY AND WELL CTLED. I ATTRIBUTE THIS TO: 1) A WELL TRAINED CREW. REOCCURRING SIMULATOR TRAINING WITH FLT SAFETY COMPANY. 2) CRM TRAINING. THE FO FOCUSED ON FLYING THE ACFT WHILE I WORKED CHKLISTS; ATC; AND INFORMING PAX. EACH KNEW WHAT TO DO AND WE WORKED AS A TEAM. 3) EXCELLENT COOPERATION FROM ATC.