An EMS helicopter and an air carrier large transport had an near midair collision approaching ZZZ.

Attributes
ACN	277162
Time
Date	199407
Day	Fri
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : zzz
State Reference	US
Altitude	agl bound lower : 1000 agl bound upper : 1000
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	tower : zzz
Operator	common carrier : air carrier
Make Model Name	B757-200
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	descent : approach
Route In Use	approach : visual arrival other
Flight Plan	IFR
Aircraft 2
Operator	general aviation : corporate
Make Model Name	Helicopter
Operating Under FAR Part	Part 135
Flight Phase	cruise other
Flight Plan	None
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
ASRS Report	277162
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	277163
Events
Anomaly	aircraft equipment problem : critical conflict : nmac non adherence : clearance other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other other : unspecified cockpit
Resolutory Action	none taken : anomaly accepted
Consequence	faa : reviewed incident with flight crew
Miss Distance	horizontal : 0 vertical : 200
Supplementary
Primary Problem	Flight Crew Human Performance

Narrative:

During an approach to runway 9R at ZZZ we received a TCASII TA at 1000 ft AGL. Immediately thereafter, TCASII commanded a climb. Also at that time, ZZZ tower said there was traffic in front of us that he was not talking to that should be over the airport. The captain continued down the GS. If he had followed the TCASII RA -- I would not be here writing this report. The helicopter went over the nose of the aircraft at 100-200 ft. Following TCASII would have resulted in a collision. Supplemental information from acn 277163: I ignored the warning because doing so would have resulted in a collision. We did not need to make any evasive maneuvers and stayed on the GS and localizer at all times. We received a call from ATC indicating that a helicopter was not where he should have been.

Original NASA ASRS Text

Title: AN EMS HELI AND AN ACR LGT HAD AN NMAC APCHING ZZZ.

Narrative: DURING AN APCH TO RWY 9R AT ZZZ WE RECEIVED A TCASII TA AT 1000 FT AGL. IMMEDIATELY THEREAFTER, TCASII COMMANDED A CLB. ALSO AT THAT TIME, ZZZ TWR SAID THERE WAS TFC IN FRONT OF US THAT HE WAS NOT TALKING TO THAT SHOULD BE OVER THE ARPT. THE CAPT CONTINUED DOWN THE GS. IF HE HAD FOLLOWED THE TCASII RA -- I WOULD NOT BE HERE WRITING THIS RPT. THE HELI WENT OVER THE NOSE OF THE ACFT AT 100-200 FT. FOLLOWING TCASII WOULD HAVE RESULTED IN A COLLISION. SUPPLEMENTAL INFO FROM ACN 277163: I IGNORED THE WARNING BECAUSE DOING SO WOULD HAVE RESULTED IN A COLLISION. WE DID NOT NEED TO MAKE ANY EVASIVE MANEUVERS AND STAYED ON THE GS AND LOC AT ALL TIMES. WE RECEIVED A CALL FROM ATC INDICATING THAT A HELI WAS NOT WHERE HE SHOULD HAVE BEEN.

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.