NTSB Identification: CHI86IA083.
The docket is stored on NTSB microfiche number 33243.
Scheduled 14 CFR UNITED AIRLINES
Incident occurred Thursday, February 06, 1986 in CHICAGO, IL
Aircraft: BOEING 727-22, registration: N7059U
Injuries: 1 Minor,51 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 FLIGHT CREW WAS UNABLE TO LOWER THE NOSE WHEEL LANDING GEAR THROUGH EITHER THE NORMAL OR BACKUP SYSTEMS. THE AIRPLANE SUBSQUENTLY MADE A NOSE GEAR UP LANDING RESULTING IN MINOR DAMAGE TO THE AIRPLANE. AN EXAMINATION OF THE NOSE GEAR DRAG BRACE ASSEMBLY REVEALED A BROKEN DRAG BRACE PAWL BLOCK LINK WHICH LEFT THE NOSE GEAR IN AN UP AND LOCKED POSITION AND PRECLUDED IT FROM BEING LOWERED IN FLIGHT.

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

LANDING GEAR,NOSE GEAR ASSEMBLY..FAILURE,PARTIAL

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

GEAR EXTENSION..NOT POSSIBLE..PILOT IN COMMAND

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

MAINTENANCE,INSTALLATION..IMPROPER..COMPANY MAINTENANCE PERSONNEL

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

LANDING GEAR,NOSE GEAR ASSEMBLY..JAMMED

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

LANDING GEAR,NOSE GEAR ASSEMBLY..IMPROPER

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