What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
Unknown to pilot an explosion had occurred in left wing. Fuel leak chaged battery cable arced. Burned hole in wing. (.4)during takeoff an explosion inside the left wing resulted in a short duration fire. The flight continued and landed uneventfully. The upper and lower wing skins were displaced and fire damage was noted aft of the battery box. The positive battery cable was chafing against an open adel clamp located near the battery box; the pk screw was not in place. Arching was noted on the battery cable. Testing of the left auxiliary fuel tank revealed seepage from the fuel tank vent line. The fuel tank was not properly secured inside the wing. Damage to the external portion of the auxiliary fuel tank near the vent line was noted. Previous fuel seepage from the left wing auxiliary fuel tank was evident in the form of damage on the ground beneath the left wing area greater than damage to the ground beneath the right wing area. Also, a wax type residue was found on the lower wing skin in the area of the fuel seepage. The service manual indicates to check electrical cables for condition every 100 hours.
As the FAA filed it
UNKNOWN TO PILOT AN EXPLOSION HAD OCCURRED IN LEFT WING. FUEL LEAK CHAGED BATTERY CABLE ARCED. BURNED HOLE IN WING. (.4)DURING TAKEOFF AN EXPLOSION INSIDE THE LEFT WING RESULTED IN A SHORT DURATION FIRE. THE FLIGHT CONTINUED AND LANDED UNEVENTFULLY. THE UPPER AND LOWER WING SKINS WERE DISPLACED AND FIRE DAMAGE WAS NOTED AFT OF THE BATTERY BOX. THE POSITIVE BATTERY CABLE WAS CHAFING AGAINST AN OPEN ADEL CLAMP LOCATED NEAR THE BATTERY BOX; THE PK SCREW WAS NOT IN PLACE. ARCHING WAS NOTED ON THE BATTERY CABLE. TESTING OF THE LEFT AUXILIARY FUEL TANK REVEALED SEEPAGE FROM THE FUEL TANK VENT LINE. THE FUEL TANK WAS NOT PROPERLY SECURED INSIDE THE WING. DAMAGE TO THE EXTERNAL PORTION OF THE AUXILIARY FUEL TANK NEAR THE VENT LINE WAS NOTED. PREVIOUS FUEL SEEPAGE FROM THE LEFT WING AUXILIARY FUEL TANK WAS EVIDENT IN THE FORM OF DAMAGE ON THE GROUND BENEATH THE LEFT WING AREA GREATER THAN DAMAGE TO THE GROUND BENEATH THE RIGHT WING AREA. ALSO, A WAX TYPE RESIDUE WAS FOUND ON THE LOWER WING SKIN IN THE AREA OF THE FUEL SEEPAGE. THE SERVICE MANUAL INDICATES TO CHECK ELECTRICAL CABLES FOR CONDITION EVERY 100 HOURS.
NTSB investigation
The NTSB’s investigation of this event, with its probable cause and findings. Matched to this report by N-number and date.
Other reports on N366J · 3
Matched to the same aircraft by N-number and date.