NTSB Identification: CHI87IA163.
The docket is stored on NTSB microfiche number 37735.
Scheduled 14 CFR NORTHWEST AIRLINES, INC.
Incident occurred Thursday, June 18, 1987 in DETROIT, MI
Probable Cause Approval Date: 07/10/1989
Aircraft: BOEING 757-251, registration: N515US
Injuries: 123 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.

A NORTHWEST AIRLINES BOEING 757, OPERATING AS FLIGHT 336, SCRAPED THE TAIL CONE AREA OF THE FUSELAGE ON THE RUNWAY WHEN THE PILOT FAILED TO MAINTAIN SUFFICIENT GROUND CLEARANCE DURING ROTATION AND TAKEOFF FROM DETROIT, MICHIGAN. THE BOEING 757 FLIGHT OPERATION MANUAL STATES THAT 'NORMALLY...APPROXIMATELY 3 DEGREES PER SECOND IS A GOOD ROTATION RATE. ' ON PAGE THREE OF THE FLIGHT DATA RECORDER DATA, UNDER PITCH, IT INDICATES A PITCH CHANGE OF 5.997 DEGREES IN ONE SECOND, AND 4.922 DEGREES IN THE NEXT SECOND. THE FLIGHT OPERATION MANUAL ALSO STATES THAT 'ROTATING AT TOO FAST A RATE FOR EXISTING CONDITIONS AND/OR AN EARLY ROTATION CAN RESULT IN A TAIL STRIKE.'

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

ROTATION..EXCESSIVE..PILOT IN COMMAND

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

AIRCRAFT HANDLING..ABRUPT..PILOT IN COMMAND

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