Accident Boeing 737-204 N198AW,

ASN Wikibase Occurrence # 326142

Date:	Saturday 30 December 1989
Time:	19:10
Type:	Boeing 737-204
Owner/operator:	America West Airlines
Registration:	N198AW
MSN:	19710/54
Year of manufacture:	1968
Total airframe hrs:	62466 hours
Cycles:	38827 flights
Engine model:	Pratt & Whitney JT8D-9A
Fatalities:	Fatalities: 0 / Occupants: 130
Aircraft damage:	Substantial, written off
Category:	Accident
Location:	Tucson International Airport, AZ (TUS) - United States of America
Phase:	Landing
Nature:	Passenger - Scheduled
Departure airport:	Phoenix-Sky Harbor International Airport, AZ (PHX/KPHX)
Destination airport:	Tucson International Airport, AZ (TUS/KTUS)
Investigating agency:	NTSB
Confidence Rating:	Accident investigation report completed and information captured

Narrative:
While descending to Tucson, a 115Volt AC wire of the no. 2 'B' hydraulic pump shorted and punctured a hydraulic system 'A' line. As the aircraft was approaching the airport a fire erupted and burned through to the electrical power wires to the standby hydraulic pump. After landing at Tucson, the aircraft overran the runway, collided with an abandoned concrete arresting gear structure, shearing off the nosegear and continued to slide for 3803 feet.

PROBABLE CAUSE: "Failure of the operator's maintenance personnel to detect an electrical wire which had chafed against a hydraulic line and which eventually arced causing a leak in the hydraulic line and subsequent fire and hydraulic system failure. In addition, previous wear of check valves in the backup hydraulic systems prevented the airplane from stopping on the runway. A contributing factor was the airplane manufacturer's inadequate guidance for maintaining the hydraulic components. "

Accident investigation: