A commuter air carrier aircraft received a TCAS RA below 1;000 ft on final approach.

Attributes
ACN	882088
Time
Date	201004
Local Time Of Day	1801-2400
Place
Locale Reference	ZZZ.Airport
State Reference	US
Aircraft 1
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Flight Phase	Final Approach Landing
Flight Plan	IFR
Aircraft 2
Make Model Name	Small Aircraft High Wing 1 Eng Fixed Gear
Flight Phase	Landing
Person 1
Function	First Officer Pilot Flying
Qualification	Flight Crew Commercial
Events
Anomaly	Conflict Airborne Conflict

Narrative:

On short final; at less than 1;000 ft AGL; I received a TCAS RA 'maintain vertical speed; maintain.' a high wing; single engine; prop aircraft flew dangerously close to my aircraft. The controller broadcast on the radio 'aircraft X; you are not cleared for a circling approach'. I was in a descent for landing and the red arc alongside the vsi was all red and only indicated green for a steeper descent angle. Because of the radio broadcast; 'not cleared for a circling approach' I did not feel that it would be safe to maneuver. I was concerned that the other aircraft would make an erratic move into a direction that I flew. I continued with the descent and landed the aircraft.

Original NASA ASRS Text

Title: A commuter air carrier aircraft received a TCAS RA below 1;000 FT on final approach.

Narrative: On short final; at less than 1;000 FT AGL; I received a TCAS RA 'maintain vertical speed; maintain.' A high wing; single engine; prop aircraft flew dangerously close to my aircraft. The Controller broadcast on the radio 'Aircraft X; you are not cleared for a circling approach'. I was in a descent for landing and the red arc alongside the VSI was all red and only indicated green for a steeper descent angle. Because of the radio broadcast; 'not cleared for a circling approach' I did not feel that it would be safe to maneuver. I was concerned that the other aircraft would make an erratic move into a direction that I flew. I continued with the descent and landed the aircraft.

Data retrieved from NASA's ASRS site as of April 2012 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.