NTSB Identification: MIA89IA043.
The docket is stored on NTSB microfiche number 37189.
Scheduled 14 CFR operation of AMERICAN AIRLINES
Incident occurred Sunday, November 27, 1988 in SAN JUAN
Probable Cause Approval Date: 01/25/1990
Aircraft: Airbus Industrie A-300-600, registration: N80057
Injuries: 14 Minor,262 Uninjured.
NTSB investigators used data provided by various sources and may not have traveled in support of this investigation to prepare this aircraft incident report.
COMPANY MAINTENANCE CREWS REPLACED THE HIGH PRESSURE BLEED VALVE PRIOR TO THE FLIGHT AND INSTALLED THE MOUNTING CLAMP IMPROPERLY. AFTER TAKEOFF THE VALVE DISCONNECTED AND THE BLEED AIR DISCHARGE ACTIVATED THE FIRE WARNING SYSTEM. THE CREW DISCHARGED BOTH FIRE BOTTLES TO NO AVAIL, LANDED AND EXECUTED AN EMERGENCY EVACUATION. DURING THE EVACUATION 14 PASSENGERS RECEIVED MINOR INJURIES.
The National Transportation Safety Board determines the probable cause(s) of this incident to be:MAINTENANCE,INSTALLATION..IMPROPER..COMPANY MAINTENANCE PERSONNEL
BLEED AIR SYSTEM,VALVE..DISCONNECTED
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