A B737-500 took evasive action to avoid a small aircraft on final approach.

Attributes
ACN	634663
Time
Date	200410
Day	Tue
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : ewr.airport
State Reference	NJ
Altitude	msl single value : 3000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : n90.tracon
Operator	common carrier : air carrier
Make Model Name	B737 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	descent : approach
Route In Use	approach : straight in
Flight Plan	IFR
Aircraft 2
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Flight Phase	other
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Experience	flight time last 90 days : 70 flight time total : 19000 flight time type : 10000
ASRS Report	634663
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Events
Anomaly	conflict : nmac
Independent Detector	aircraft equipment : tcas other flight crewa
Resolutory Action	flight crew : took evasive action
Miss Distance	horizontal : 0 vertical : 200
Supplementary
Problem Areas	Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance

Narrative:

On final to runway 4R ewr a light plane popped up on the TCASII at about 12:30 O'clock position and 200 ft below our altitude. He was moving through our path so we went over him to about 3500 ft. The approach and landing were normal.

Original NASA ASRS Text

Title: A B737-500 TOOK EVASIVE ACTION TO AVOID A SMALL ACFT ON FINAL APCH.

Narrative: ON FINAL TO RWY 4R EWR A LIGHT PLANE POPPED UP ON THE TCASII AT ABOUT 12:30 O'CLOCK POS AND 200 FT BELOW OUR ALT. HE WAS MOVING THROUGH OUR PATH SO WE WENT OVER HIM TO ABOUT 3500 FT. THE APCH AND LNDG WERE NORMAL.

Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.