Incident Boeing 727-251 Adv. N277US, Monday 24 October 1988

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Date:	Monday 24 October 1988
Time:	16:10
Type:	Boeing 727-251 Adv.
Owner/operator:	Northwest Airlines
Registration:	N277US
MSN:	21156/1170
Year of manufacture:	1975
Total airframe hrs:	31131 hours
Engine model:	P&W JT8D-15
Fatalities:	Fatalities: 0 / Occupants: 80
Other fatalities:	0
Aircraft damage:	Minor
Category:	Incident
Location:	Chicago-O'Hare International Airport, IL (ORD/KORD) - United States of America
Phase:	Take off
Nature:	Passenger - Scheduled
Departure airport:	Chicago O'Hare International Airport, IL (KORD)
Destination airport:	Boston Logan International Airport, MA (KORD)
Investigating agency:	NTSB
Confidence Rating:	Accident investigation report completed and information captured

Narrative:
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.

Probable Cause: Occurrence #1: AIRFRAME/COMPONENT/SYSTEM FAILURE/MALFUNCTION
Phase of Operation: TAKEOFF - ROLL/RUN

Findings
1. (C) LANDING GEAR,AXLE - FATIGUE
2. (C) MATERIAL DEFECT - MANUFACTURER
3. LANDING GEAR,AXLE - FAILURE,TOTAL

Accident investigation: