NTSB Identification: DEN88LA004.
The docket is stored on NTSB microfiche number 34634.
Accident occurred Monday, October 05, 1987 in RIO RANCHO, NM
Probable Cause Approval Date: 11/29/1988
Aircraft: BALLOON WORKS FIREFLY 7-B, registration: N15260
Injuries: 2 Uninjured.

NTSB investigators may not have traveled in support of this investigation and used data provided by various sources to prepare this aircraft accident report.

THE PLT RPTD THAT SHE HAD VENTED THE BALLOON TO LAND. SHE SAID IT TAKES BOTH OF HER HANDS TO OPEN THE VENT AND HOLD IT OPEN. 'WHEN THE BALLOON HIT THE GROUND THE BURNER WENT ON BY ITSELF, WIDE OPEN. THE ENVELOPE WAS SWINGING FROM THE CONTACT OF THE BASKET WITH THE GROUND AND WAS IN THE PATH OF THE BURNER ALMOST INSTANTLY.' THE ENVELOPE WAS DAMAGED BY THE FIRE BUT THERE WERE NO INJURIES. AN FAA AIRWORTHINESS INSP EXAMINED THE BURNER AFTER THE ACCD. HE REPORTED THAT 'BEFORE TEARDOWN THE BURNER ASSY WAS INSTALLED ON THE GONDOLA AND OPERATIONALLY TESTED. THE VALVE WAS OPERATED NORMALLY APPROX 10 ON/OFF CYCLES. THE VALVE WAS PRESSURE TESTED AND NO LEAKS WERE NOTED. THE BLAST VALVE WAS THEN REMOVED FROM THE BURNER ASSY AND DISASSEMBLED. THE DIMENSION BETWEEN THE ACTUATING LEVER AND THE BONNET WAS APPROX .006 INSTEAD OF THE REQ MIN OF .010. THIS WAS DUE TO AN EXTRA TEFLON WASHER INSTALLED BETWEEN THE LEVER AND BONNET, HOWEVER, THE OPERATION OF THE VALVE WAS NOT AFFECTED.' NO OTHER DISCREPENCIES WERE NOTED.

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

BALLOON EQUIPMENT,BURNER SYSTEM..DEPLOYED INADVERTENTLY

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