7ACChamp

Parts most often named Spar (42) · Fitting (2)

AIRCRAFT GROUND LOOPED ON LANDING AND RT WING STRUCK GROUND AT WING TIP, SEE DRAWING BELOW. CAUSED LITTLE DAMAGE TO TIP BOW 7-440 AND NO DAMAGE TO RIB S-143. UPON INSPECTION FOUND 8 CRACKS IN GROWTH RINGS GOING ALL THE WAY TO PLYWOOD DOUBLER FOR REAR SPAR STRUT, WAS ABLE TO PUT RAZOR BLADE INTO MOST CRACKS.

THIS REPORT IS BEING SUBMITTED IAW AD 200-25-02 R1. LT AND RT WING TIPS WERE DAMAGED DUE TO LOOSE TIE DOWN ROPES. OTBD MOST RIBS WERE REPLACED AND RT AFT SPAR WAS REPAIRED AT STA 195.

DURING THE ANNUAL INSP, A CRACK WAS DISCOVERED IN THE REAR SPAR OF THE LT WING. THE CRACK WAS IN THE CTR OF THE SPAR RUNNING LENGTH WISE LT AND RT OF WHERE THE WING STRUT ATTACHES. (K)

Parts most often named Cylinder (2) · Exhaust Valve (2) · Rocker (1) · Valve (1)

ON JULY 14, 2020 12:15 CDT [tail no. removed] A CHAMPION 7EC LOST POWER TO THE ENGINE, AND LANDED IN A FIELD NEAR PORT O'CONNER, TX. THE AIRCRAFT MAIN LANDING COLLAPSED AND THE ENGINE WAS PARTIALLY TORN FROM THE ENGINE MOUNT. THE BROKEN CARBURATOR BEGAN LEAKING FUEL WHICH CAUGHT FIRE, CONSUMING THE ENGINE ACCESSORIES AND FIREWALL FORWARD. A PARTIAL ENGINE TEAR DOWN FOR THE NTSB AND FAA WAS CONDUCTED. REMOVAL OF THE NR THREE CYCLINDER IDENTIFIED THE NR THREE EXHAUST VALVE STUCK IN THE OPEN POSITION IN THE VALVE GUIDE.

WHEN THE NR 4 CYLINDER WAS REMOVED, THE EXHAUST VALVE HEAD WAS FOUND TO BE BROKEN OFF, ABOUT .5 INCH FROM THE FACE OF THE VALVE, CAUSING FAILURE OF THE PISTON AND FAILURE OF THE INTAKE VALVE. THE CIRCUMSTANCES OF THE FAILURE CAUSED A LOSS OF ENGINE POWER AND A FORCED LANDING IN A FIELD. THE PILOT WAS UNHARMED. (K)

ENGINE WAS INSTALLED ON THE AIRCRAFT AND RUN UP. AN OIL LEAK WAS NOTICED IN THE LOWER SPARK PLUG BOSS AREA OF NR 1 CYLINDER. FURTHER EXAMINATION REVEALED THAT SOME CUTS BETWEEN FINS ADJACENT TO THE SPARK PLUG HOLE NEARLY PENETRATED THE THREAD AREA OF THE SPARK PLUG HOLE. CYLINDER NR 2 HAD A SIMILAR PROBLEM BUT THE CUTS ONLY PENETRATED HALFWAY THROUGH THE BOSS SURFACE.

Parts most often named Rib (3)

THE FIRST WING RIB LOCATED IB OF THE AILERONS WAS FOUND CRACKED ALONG THE RADIUS OF THE ATTACH TAB WHERE THE RIB IS SECURED TO THE AFT SPAR. THIS AIRCRAFT WAS SUBJECTED TO YEARS OF PREVAILING WINDS QUARTERING AGAINST THE T/E OF THE LT AILERON. NO GUST LOCKS WERE UTILIZED. THE RIBS WERE REPAIRED AND THE WINGS RECOVERED. THE OWNER HAS ERECTED A MORE SUITABLE SHELTER. (GL11200505059) (K)

Parts most often named Elbow (1) · Valve (1) · Drain (1)

INSTALLED QUICK DRAIN VALVE (OIL) ON NEW AIRCRAFT/ ENGINE. AIRCRAFT FLEW APPROX 1 HR , INITIAL FLIGHT TEST. VERY MINUTE OIL LEAK WAS NOTED FROM OIL QUICK DRAIN VALVE. REMOVED VALVE TO FIND VALVE SNAP RING IN OIL DRAINED FROM ENGINE, ALSO FOUND O-RING SPLIT. NOTE: NO DAMAGE TO ENGINE OCCURRED. (K)

INSTALLED OIL QUICK DRAIN VALVE PN SG250 ON NEW AIRCRAFT/ ENGINE. AIRCRAFT FLEW APPROX 1 HOUR. OIL LEAK NOTICED FROM DRAIN VALVE. REMOVED VALVE TO FIND VALVE SNAP RING IN OIL DRAINED FROM ENGINE AND VALVE O-RING DAMAGED. ONE CUT THROUGH AND THE OTHER NICKED. INVESTIGATION REVEALED OIL DRAIN VALVE CONTACTED THE EDGE OF THE OIL PICK-UP TUBE CAUSEING DAMAGE. SUBJECT VALVE IS NOT COMPATABLE WITH THE O200A66B ENGINE. (K)

OIL PRESSURE LINE LEAKING AT 45 DEGREES, ELBOW EXITING THE CRANKCASE. REPLACED AUTOMOBILE FITTING WITH MS20823-4D FITTING WITH A NR 60 RESTRICTOR. ALSO, REPLACED OIL PRESSURE LINE FROM CRANKCASE TO FIREWALL.

Parts most often named Gascolator (1) · Screen (1)

THIS AIRCRAFT WAS INVOLVED IN A FUEL STARVATION ACCIDENT BELIEVED CAUSED BY FAILURE OF GASCOLATOR GLASS BOWL. SAFETY WIRE AND SAFETYING DEVICE STILL ATTACHED TO ASSY. CHAMPION ACFT CORP. [S/N removed] HINT NR 15 RECOMMENDS GLASS BOWLS BE REPLACED WITH METAL UNITS DUE TO PREVIOUS FAILURES OF GLASS BOWLS CAUSED BY VIBRATION OR OVERTORQUING THE ADJUSTMENT CLAMP. TOTAL AIRFRAME TIME 4,399.1 HRS.

Parts most often named Seat Valve (1) · Carburetor (1)

ENGINE FAILURE, BELIEVE DUE TO FUEL STARVATION. GOOD FUEL FLOW UP TO CARBURETOR. NO CONTAMINATION FOUND WITH GASCOLATOR. UPON CARBURETOR DISASSEMBLY FOUND VERY FINE DIRT IN CARBURETOR FUEL STRANER AND FLOAT CHAMBER. ALSO, FOUND MAIN AIR BLEED JET NEARLY TOTALLY OBSTRUCTED WITH GUMMY LIKE FOREIGN MATTER. PROBABLE CAUSE: FUEL FLOW IMBALANCE. ONE EITHER OBSTRUCTION OF AIR JET OR FUEL JET.

ENGINE QUIT ON TAKEOFF. DISASSEMBLED CARBURETOR AND INSPECTION FOUND SEAT VALVE HAD NOT BEEN PROPERLY TORQUED. SEAT WORKED LOOSE AND LOWERED FLOAT LEVEL TO WHERE ENGINE COULD NOT DEVELOP FULL POWER. CARBURETOR OVERHAULED 10-95.

Parts most often named Air Filter (1) · Air Box Valve (1)

DURING ANNUAL INSPECTION, THE ORIGINAL AIR FILTER ASSEMBLY WAS FOUND TO HAVE HAD THE GUTS REMOVED AND ALTERED TO ACCEPT A BRACKET AIR FILTER ELEMENT BA-4106 WHICH WAS CUT TO SIZE. THIS IS NOT APPROVED AND NOT SAFE. AIRCRAFT TT: 2,385.0 HOURS.

THE SPOT WELD WHICH ATTACHES THE BUTTERFLY VALVE TO THE SHAFT BROKE WHICH ALLOWED THE VALVE TO BE SUCKED UP INTO THE CARBURETOR AND BLOCK OFF THE AIR TO THE ENGINE. THIS CAUSED THE ENGINE RPM TO DROP TO 700 RPM. THE PILOT LANDED IN A PLOWED FIELD, NO FURTHER DAMAGE TO AIRCRAFT.

Parts most often named Coil (1) · Impulse Coupling (1)

PILOT REPORTED LOSS OF POWER ON TAKEOFF, RETURNED TO AIRPORT. AFTER LANDING HE AGAIN CHECKED HIS MAG DROP AND REPORTED HIS LT MAG DROP TO BE ABOUT 300 RPM. FURTHER INVESTIGATION FOUND THE ONE OF THE IMPULSE COUPLING PAWLS ON THE LT MAG HAD BROKE IN HALF AT THE PIVOT POINT. THE PIECES FELL HARMLESSLY INTO THE OIL SUMP AND WERE REMOVED. (K)

Parts most often named Spar (1)

DURING ANNUAL INSP, REF AD 2000-25-02 R1, FOUND 3 AREAS WHERE THERE WERE CRACKS. ACFT IS NOT AIRWORTHY UNTIL THE SPAR IS REPLACED.

Parts most often named Spinner (1)