NTSB Identification: CHI89IA018.
The docket is stored on NTSB microfiche number 38706.
Scheduled 14 CFR operation of NORTHWEST AIRLINES, INC.
Incident occurred Monday, October 24, 1988 in CHICAGO, IL
Probable Cause Approval Date: 06/11/1990
Aircraft: BOEING B-727-200A, registration: N277US
Injuries: 80 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.

ON DEPARTURE FROM CHICAGO, ILLINOIS, O'HARE AIRPORT THE AIRCRAFT EXPERIENCED A LOSS OF THE INBOARD LEFT MAIN WHEEL. THE AIRCRAFT DIVERTED TO DETROIT, MICHIGAN, WHERE IT WAS LANDED WITH NO DAMAGE TO THE AIRCRAFT AND NO INJURIES TO THE CREW OR PASSENGERS. SUBSEQUENT EXAMINATION OF THE BROKEN INBOARD AXLE ASSEMBLY BY THE NTSB METALLURGICAL LAB, REVEALED FATIGUE CRACKING OF THE AXLE.

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

LANDING GEAR,AXLE..FATIGUE

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

MATERIAL DEFECT..MANUFACTURER

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