A G1159 had a conflict with a light aircraft during traffic pattern entry at 1;500 ft. The traffic h...

Narrative:

Once in level cruise flight while in VMC; center advised holding due to delays in the area. The captain [requested] to proceed VFR; but only as long as we could receive advisories. ATC approved and the captain initiated a VFR climb to 13;500 ft. During the descent phase of the flight; the captain maintained airspeed in excess of approved limits for the airspace. While I was speaking with the local controlling agency; the captain called tower to check in and request advisories well in advance of nearing the class D airspace. After being instructed a frequency change and radar services terminated; I checked in with tower five miles southeast of the field for a left downwind entry. I was advised to report a three mile final. I then asked if there was traffic in the area and was advised of south-westbound traffic down the shoreline at 1;500 ft. While attempting to locate the traffic; the TCAS instructed a resolution advisory to climb. The captain did not respond to the RA and maintained course and altitude until soon after spotting the aircraft. I had not spotted the aircraft until within close proximity and discovered it to be of the single engine low wing type; passing just underneath the starboard side of the aircraft at the 2:30 position; head on. After landing; the tower advised [us that] center had called and advised that we had operated within close proximity to another aircraft. The captain instructed me to respond as 'to having the aircraft on TCAS; but not ever having a visual on the aircraft itself.'

Original NASA ASRS Text

Title: A G1159 had a conflict with a light aircraft during traffic pattern entry at 1;500 FT. The traffic had been reported by the Tower and generated a TCAS RA. The Captain; who was pilot flying; did not take evasive action.

Narrative: Once in level cruise flight while in VMC; Center advised holding due to delays in the area. The Captain [requested] to proceed VFR; but only as long as we could receive advisories. ATC approved and the Captain initiated a VFR climb to 13;500 FT. During the descent phase of the flight; the Captain maintained airspeed in excess of approved limits for the airspace. While I was speaking with the local controlling agency; the Captain called Tower to check in and request advisories well in advance of nearing the class D airspace. After being instructed a frequency change and RADAR services terminated; I checked in with Tower five miles southeast of the field for a left downwind entry. I was advised to report a three mile final. I then asked if there was traffic in the area and was advised of south-westbound traffic down the shoreline at 1;500 FT. While attempting to locate the traffic; the TCAS instructed a resolution advisory to climb. The Captain did not respond to the RA and maintained course and altitude until soon after spotting the aircraft. I had not spotted the aircraft until within close proximity and discovered it to be of the single engine low wing type; passing just underneath the starboard side of the aircraft at the 2:30 position; head on. After landing; the Tower advised [us that] Center had called and advised that we had operated within close proximity to another aircraft. The Captain instructed me to respond as 'to having the aircraft on TCAS; but not ever having a visual on the aircraft itself.'

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.

Attributes
ACN	956667
Time
Date	201106
Local Time Of Day	1201-1800
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	Gulfstream III (G1159A)
Operating Under FAR Part	Part 91
Flight Phase	Initial Approach
Flight Plan	VFR
Aircraft 2
Make Model Name	Small Aircraft
Person 1
Function	Pilot Not Flying First Officer
Qualification	Flight Crew Instrument Flight Crew Flight Instructor Flight Crew Multiengine Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 50 Flight Crew Total 2500 Flight Crew Type 350
Events
Anomaly	Conflict Airborne Conflict Deviation - Procedural Published Material / Policy
Miss Distance	Horizontal 500 Vertical 100

A G1159 had a conflict with a light aircraft during traffic pattern entry at 1;500 ft. The traffic had been reported by the tower and generated a TCAS RA. The captain; who was pilot flying; did not take evasive action.