NTSB Identification: LAX84IA195.
The docket is stored on NTSB microfiche number 25272.
Scheduled 14 CFR AMERICAN AIRLINES, INC.
Incident occurred Friday, February 17, 1984 in SANTA ANA, CA
Aircraft: MCDONNELL DOUGLAS DC-9-82, registration: N203AA
Injuries: 98 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.
SHORTLY AFTER TAKEOFF A TTL PWR LOSS WAS EXPERIENCED ON THE NUMBER 1 ENGINE. EXAMINATION OF THE ENGINE REVEALED SUBSTANTIAL DAMAGE OCCURRED IN THE COMPRESSOR SECTION FROM STAGE 6 REARWARD. 40 STAGE 8 COMPRESSOR BLADES WERE FORCED COMPLETELY OUT OF THEIR DISK DOVETAIL SLOTS. OF THE 18 REMAINING BLADES, 17 WERE MISSING THEIR AIRFOILS WHICH HAD FRACTURED JUST ABOVE THE PLATFORM. THE 18TH BLADE WAS FRACTURED THROUGH THE ROOT AREA JUST BELOW THE PLATFORM. METALLURGICAL EXAMINATION OF THE 18TH BLADE DISCLOSED THE BLADE SUSTAINED A DIAGONAL AND TRANSVERSE FRACTURE THROUGH THE ROOT OF THR BLADE PROGRESSING IN HIGH CYCLE FATIGUE FROM THE ORIGIN ALONG THE EDGE OF THE DISK.
The National Transportation Safety Board determines the probable cause(s) of this incident to be:COMPRESSOR ASSEMBLY,BLADE..FATIGUE
The National Transportation Safety Board determines the probable cause(s) of this incident to be:COMPRESSOR ASSEMBLY,BLADE..SEPARATION
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