MINR · BOEING 737-204 · 1989-12-31 · TUCSON, AZ, USA
Event
NTSB number
LAX90FA061
Event ID
20001213X29969
Type
Accident
Date
1989-12-31
Location
TUCSON, AZ, USA
Coordinates
32.150516, -110.929687
Injuries
Highest injury
MINR
Fatal
0
Serious
0
Minor
10
Uninjured
123
Total aboard
133
Aircraft
Make
BOEING
Model
737-204
Registration
N198AW
FAR Part
121
Engines
2
Damage
SUBS
Conditions
Light
NDRK
Weather
VMC
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.