N458F

ATA 3260

DURING THE APPROACH INTO PALWAUKEE (PWK), THE GEAR HANDLE WAS SELECTED TO THE DOWN POSITION TO EXTEND THE GEAR. AFTER THE GEAR EXTENDED IT WAS NOTED THAT THE LEFT MAIN GEAR GREEN DOWN AND LOCK LIGHT WAS NOT ILLUMINATED. THE GEAR WAS CYCLED UP AND DOWN TWICE, AND AFTER THE SECOND EXTENSION THE EMERGENCY GEAR EXTENSION SYSTEM WAS DEPLOYED TO ENSURE THAT THE GEAR WAS DOWN AND LOCKED. THE GREEN LIGHT DID NOT COME ON. THE PILOTS DIVERTED TO O’HARE (ORD), AND AS THE LEFT GEAR CONTACTED THE RUNWAY THE LIGHT ILLUMINATED. THE AIRCRAFT WAS INSPECTED AND ISSUED A SPECIAL FLIGHT PERMIT AND REPOSITIONED TO GRAND RAPIDS (GRR) WITH THE GEAR DOWN.

ATA 3260

THE GEAR HANDLE WAS MOVED TO THE EXTEND SELECTION DURING APPROACH TO GRR, THE GREEN INDICATOR FOR THE NLG DID NOT ILLUM. PERFORMED THE EMERGENCY PROCEDURES TO ENSURE THE NLG WAS DOWN AND LOCKED. THE NLG INDICATOR FAILED TO ILLUM. FLY-BY OF THE TOWER, TO VISUALLY CHECK THE NLG. IT APPEARED TO BE DOWN, A/C LANDED. THE GROUND FIRE AND RESCUE SYSTEM WAS IN PLACE DURING THE LANDING AND THE NLG DID NOT COLLAPSE. IT WAS DISCOVERED THE INTERNAL SWITCH OF THE NLG ACTUATOR FAILED. THE UNIT WAS REMOVED FROM SERVICE AND SENT OUT FOR REPAIR. AFTER FURTHER RESEARCH IT WAS DISCOVERED THE NLG ACTUATOR WAS REPLACED PER CESSNA SB550-32-48 R2 ON 10/12/2004 (1653.8 TT 1233 CYCL), AND WAS VERIFIED REPLACED PER SB550-32-48 R3 ON 7/29/2005. THE ACTUATOR WAS SENT OUT FOR A SWITCH REPLACEMENT ON 1/13/2006 AT 304 HRS AND 244 CYC IN SERVICE. THE FAILED SWITCH P/N: 1EN329R THAT WAS ON THE NOSE GEAR ACTUATOR P/N: 1548500-9 / 9912485-4, S/N: 704, HAS ACCUMULATED 1450.6 HOURS AND 1165 CYCLES TIME IN SERVICE.