NTSB Identification: CHI85IA212.
The docket is stored on NTSB microfiche number 33419.
Scheduled 14 CFR AMERICAN AIRLINES INC.
Incident occurred Monday, May 27, 1985 in CHICAGO, IL
Aircraft: BOEING 727-023, registration: N1984
Injuries: 121 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.
AMERICAN AIRLINES FLT 57 HAD DEPARTED BALTIMORE FOR CHICAGO. ON FINAL APPROACH AT OHARE THE CREW DISCOVERED THE NOSE GEAR WOULD NOT EXTEND. THE FE MADE THREE ATTEMPTS TO CRANK DOWN THE GEAR ALL OF WHICH WERE UNSUCESSFUL. AFTER LANDING WITH NOSE GEAR UP ALL 121 OCCUPANTS SLIDE EVACUATED WITH NO REPORTED INJURY. AFTER JACKING THE NOSE UP A GROUND CREW MAN WENT ABOARD AND CRANKED THE GEAR TO THE DOWN POSITION WITH NO DIFFICULTY.
The National Transportation Safety Board determines the probable cause(s) of this incident to be:GEAR EXTENSION..IMPROPER..FLIGHT ENGINEER
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