NONE · Boeing 747-422 · 2003-04-01 · Chicago, IL, USA
Event
NTSB number
CHI03IA097
Event ID
20030410X00480
Type
Incident
Date
2003-04-01
Location
Chicago, IL, USA
Coordinates
41.979721, -87.904441
Injuries
Highest injury
NONE
Fatal
0
Serious
0
Minor
0
Uninjured
319
Total aboard
319
Aircraft
Make
Boeing
Model
747-422
Registration
N175UA
FAR Part
121
Engines
4
Damage
—
Conditions
Light
DAYL
Weather
VMC
Probable cause
Failure of company maintenance personnel to fully comply with published maintenance/inspection procedures, as well as the resulting inoperative drain heaters and restricted movement of the aileron control cables. Contributing factors were the impeded waste water drain system due to the inoperative heaters and the reduced aileron control due to restricted movement of the control cables.