N37SF
Registered owner: GO-TIME AVIATION LLC, TX (owner ≠ operator)
Operators of this aircraft
Who operated this tail, and how firmly we know it.
No operator established for this aircraft.
Accident & incident history
No NTSB accidents or incidents on file for this aircraft.
Maintenance disclosures
DURING ANNUAL INSP, CRACKS WERE NOTED IN FWD CARRY-THRU SPAR WEB. LOCATED AT LT UPPER OB MOST HUCK BOLTS (2 EA) ON FWD SIDE OF CARRY-THRU ASSY. HEAD SIDE OF UPPER HUCK BOLT IS INACCESSIBLE FOR VIEWING WITHOUT WING REMOVAL. LWR HUCK BOLT IS ACCESSIBLE, NO MOVEMENT OR CRACKING WAS NOTED. WEB SKIN AROUND HUCK BOLTS WAS REMOVED DOWN TO WEB TIE PLATE. PLATE WAS EDDY CURRENT INSPECTED FOR CRACKS, NONE WERE DETECTED. THIS AREA WILL BE REINSPECTED BY DYE PENETRANT EVER ANNUAL INSP, AND BY EDDY CURRENT METHOD EVERY 500 HRS. THIS AC HAS 2 BOLT AREAS CRACKED ON ONE SIDE, REQUIRED REPAIR DOES NOT EXTEND INTO THIS AREA. THE HIGH AC TIME AND DAMAGE HISTORY WERE CONTRIBUTING FACTORS TO THE CRACKING IN THIS AREA.
DURING A SCHEDULED INSPECTION, A CRACK WAS DISCOVERED IN THE LEFT ENGINE MOUNT AT THE UPPER CROSSOVER TUBE NEAR THE WELD AT THE UPPER INBOARD ENGINE ATTACH POINT (CUSHION MOUNT). AD 91-15-20 A3 AND C HAD BEEN PREVIOUSLY C/W 2,344.4 HOURS AGO. THE MOUNT WAS REMOVED AND REPAIRED BY REPLACING THE DAMAGED TUBE. A RECORD CHECK SHOWS SUDDEN ENGINE STOPPAGE 1,160.8 HOURS PRIOR TO THIS DISCOVERY, AT WHICH TIME THE ENGINE WAS OVERHAULED AND THE MOUNT WAS INSPECTED FOR DAMAGE. IT IS BELIEVED THAT IN LIGHT OF THE PAST HISTORY, THE SUDDEN STOPPAGE FATIGUED THE MOUNT AT THIS POINT AND NORMAL ENGINE VIBRATION ALLOWED THE CRACK TO DEVELOP. (X)