North Central Aviation, Inc.

Part: SQUIB — MISWIRED (ZONE 100) · airframe 843 hrs · 627 cycles

WAS COMPLYING WITH THE CH 4, DOC MV INSPECTION, CALLS FOR A DETAILED INSPECTION OF BOTH ENGINE & APU FIRE EXTINGUISHER WIRING. THIS IS THE FIRST OCCURRENCE OF THIS TYPE OF INSPECTION ON THIS AIRCRAFT SINCE NEW. THE APU SQUIB WAS WIRED CORRECTLY BUT I DID FIND THAT BOTTLE PRESSURE SWITCH ELEC CONNECTOR WAS NOT ATTACHED AND WAS HANGING LOOSE. OF THE FOUR SQUIBS ON THE TWO ENG FIRE BOTTLES, FOUND 3 OF THEM WIRED BACKWARDS. THIS WOULD HAVE PREVENTED THOSE SQUIBS FROM FIRING IF A PILOT WOULD HAVE SELECTED THAT SQUIB IN THE EVENT OF AN ENGINE FIRE. WITH HOW THEY WERE WIRED (FROM THE FACTORY) THERE WAS ONLY ONE SHOT AVAILABLE FOR THE LT ENG, & NOTHING ON THE RT ENG. THERE HAVE BEEN NO INSPECTIONS OR MX ON THE WIRING OR EXTINGUISHING SYSTEM SINCE THE PLANE LEFT THE FACTORY NEW. AD 2007-11-17 ADDRESSES THIS ISSUE AND WAS SIGNED OFF AS COMPLIED WITH AT THE TEXTRON AVIATION INC. FACTORY WHEN THE PLANE WAS RELEASED NEW. MANDATORY SERVICE LETTER SL560XL-26-02 WAS EFFECTIVE AT THE TIME THE ACFT WAS RELEASED AS NEW. THE SL STATES THAT ACFT WITH S/N 6307 AND ON WOULD HAVE THE SL INCORPORATED AT PRODUCTION. ABLE TO VERIFY THAT ALL THE SQUIB WIRES ARE LABELLED CORRECTLY AND THAT THE LABELS ARE CLEARLY LEGIBLE.

Part: CROSS TIE — CRACKED (ZONE 200) · airframe 7,596 hrs · 6,968 cycles

DURING PHASE INSPECTION FOUND THE LEFT CROSS TIE AT FUSELAGE STATION 201.775 CRACKED IN HALF. CRACK RUNS HORIZONTAL AND GOES THROUGH A RIVET HOLE. CRACK IS LOCATED AT THE AFT LOWER CORNER OF THE EMERGENCY EXIT FRAME OPENING. DURING FURTHER INSPECTION, FOUND THAT THE RIVETS ON THE RIGHT HAND SIDE IN THE SAME LOCATION ARE LOOSE.

Part: OIL SYSTEM — LOW PRESSURE (RH ENGINE) · airframe 14,636 hrs · 11,668 cycles

AIRCRAFT WAS DEPARTING KTTN WITH 5 PASSENGERS ON THE WAY BACK TO KMKT. DURING THE CLIMB OUT…APPROXIMATELY 1830Z…THE RED MASTER WARNING CAME ON. PILOTS SAW THE CAS MESSAGE STATING IN RED A RIGHT ENGINE LOW OIL PRESSURE LIGHT. PILOTS GOT THE EMERGENCY CHECKLIST OUT AND SHORTLY AFTER ALSO NOTICED A FOG/SMOKE DEVELOPING IN BOTH THE CABIN AND COCKPIT. AT THIS TIME, PILOTS STATED TO PHILADELPHIA APPROACH THAT THEY WOULD LIKE TO RETURN TO KTTN. APPROACH ASKED IF THEY WOULD LIKE TO DECLARE AN EMERGENCY AND THEY STATED “NO”. PILOTS WENT THROUGH THE CHECKLIST AND AGREED TO SHUTDOWN THE RIGHT ENGINE AND THE FOG/SMOKE TOTALLY DISAPPEARED FROM BOTH THE COCKPIT AND CABIN. AT THIS POINT, PILOTS EXECUTED A SINGLE ENGINE VISUAL APPROACH ONTO RWY 24 AT KTTN. WE LANDED AND TAXIED TO SIGNATURE AVIATION WITH NO FURTHER ISSUES OR INCIDENTS. ALSO, DURING THIS INCIDENT ALL OTHER RIGHT ENGINE INDICATORS STAYED NORMAL/IN THE GREEN. AN AOG MOBILE MX TEAM WAS ENLISTED AND THEY BEGAN TROUBLESHOOTING PROCEDURE AS DIRECTED BY PRATT & WHITNEY CANADA. OIL RESIDUE WAS FOUND IN AND AROUND THE BOV. P&WC SUSPECTS THAT A MAIN BEARING SEAL OR INTERNAL OIL TRANSFER TUB SEAL HAS FAILED, AND HAS DETERMINED THAT THE ENGINE WILL NEED TO BE REMOVED AND SENT TO A QUALIFIED SHOP FOR REPAIR.

Part: WINDSHIELD — CRACKED (COCKPIT)

RIGHT WINDSHIELD OUTER PANE CRACKED ABOUT 4" FROM THE INBD EDGE OF THE WINDSHIELD.

Part: SEAT FRAME — CRACKED (CABIN) · airframe 3,639 hrs · 1,859 cycles

DURING ANNUAL INSPECTION, FOUND PASSENGER SEAT WITH THE MAIN FRAME CRACKED