NTSB Identification: FTW88IA097.
The docket is stored on NTSB microfiche number 38652.
Scheduled 14 CFR AMERICAN AIRLINES
Incident occurred Monday, May 09, 1988 in DETROIT, MI
Probable Cause Approval Date: 06/11/1990
Aircraft: BOEING 727-223, registration: N800AA
Injuries: 112 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.

THE PIC MADE AN UNSCHEDULED LANDING FOLLOWING DECOMPRESSION AT 30,000 FEET. THE AIRCRAFT HAD BEEN WRITTEN UP BY FLIGHTCREWS NUMEROUS TIMES BETWEEN MAY 7 AND MAY 9 FOR PRESSURIZATION PROBLEMS. PRESSURE BULKHEAD AT STATION 940 IN THE RIGHT WHEEL WELL CRACKED 15 1/2 INCHES DUE TO FATIGUE. AIRCRAFT HAD FLOWN 55,437 HOURS AND HAD 39,983 CYCLES AT THE TIME OF DECOMPRESSION, ONE OF THE HIGHEST HRS AND CYCLES IN THE AMERICAN FLEET. BOEING AIRCRAFT ISSUED A SERVICE BULLETIN DATED MAY 4, 1979 WHICH WAS NOT COMPLIED WITH THAT ADDRESSED THE ISSUE OF BEAD CRACKING IN THE 940 STATION WHEEL WELL PANEL.

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

FUSELAGE,FLOOR..FATIGUE

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

FUSELAGE,FLOOR..CRACKED

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

MAINTENANCE,INSPECTION..INADEQUATE..COMPANY MAINTENANCE PERSONNEL

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