Accident Boeing 727-223 Adv. N815AA, Friday 25 January 1991

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Date:	Friday 25 January 1991
Time:	08:30 LT
Type:	Boeing 727-223 Adv.
Owner/operator:	American Airlines
Registration:	N815AA
MSN:	22470/1771
Year of manufacture:	1981
Engine model:	P&W JT8D
Fatalities:	Fatalities: 0 / Occupants: 93
Other fatalities:	0
Aircraft damage:	None
Category:	Accident
Location:	Indianapolis, IN - United States of America
Phase:	Standing
Nature:	Passenger - Scheduled
Departure airport:
Destination airport:	Dallas/Fort Worth International Airport, TX (DFW/KDFW)
Investigating agency:	NTSB
Confidence Rating:	Accident investigation report completed and information captured

Narrative:
AMERICAN FLIGHT 323 (AA323) TAXIED TO THE HOLD SHORT LINE FOR RUNWAY 23R. IN AN ATTEMPT TO CORRECT A STATIC/PRESSURIZATION SYSTEM PROBLEM THE CREW PERFORMED A POWER RUN-UP. THE JET BLAST CONTACTED AND MOVED A NORTHWEST DC9 (NW878) WHICH WAS PARKED AT GATE A7, BEHIND AND PERPENDICULAR TO AA323. THE MOVEMENT OF THE AIRPLANE RESULTED IN AN EXTERNAL HEATER HOSE DISCONNECTING FROM THE AIRPLANE. A 15 LB METAL COUPLING ON THE END OF THE HOSE STRUCK A MECHANIC WHEN IT DISCONNECTED. THE MECHANIC WAS HOSPITALIZED WITH INTERNAL INJURIES. THE CREW OF AA323 REPORTED BEING UNAWARE OF THE CLOSE PROXIMITY OF NW878. AA323 DID NOT REQUEST OR OBTAIN A CLEARANCE TO PERFORM THE RUN-UP IN THE UNAUTHORIZED AREA.

Probable Cause: THE PILOT'S FAILURE TO USE PROPER PROCEDURES AND THE IMPROPER USE OF THE THROTTLES.

Accident investigation: