EC130E military aircraft on approach had near midair collision with UH1 which was unrpted to reporte...

Attributes
ACN	385062
Time
Date	199711
Day	Thu
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : mtn
State Reference	MD
Altitude	msl bound lower : 1000 msl bound upper : 1000
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	tracon : bwi tower : mtn
Operator	other
Make Model Name	Hercules (C-130)
Operating Under FAR Part	Part 91
Flight Phase	descent : approach
Flight Plan	IFR
Aircraft 2
Operator	other
Make Model Name	Helicopter
Operating Under FAR Part	Part 91
Flight Phase	cruise other
Person 1
Affiliation	government : military
Function	flight crew : captain oversight : pic
Qualification	pilot : instrument pilot : commercial pilot : atp
Experience	flight time last 90 days : 300 flight time total : 9500 flight time type : 5000
ASRS Report	385062
Person 2
Affiliation	government : military
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	conflict : nmac non adherence : published procedure
Independent Detector	other flight crewa
Resolutory Action	none taken : detected after the fact
Consequence	Other
Miss Distance	horizontal : 0 vertical : 100
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Inter Facility Coordination Failure

Narrative:

I was flying an EC130E on a military training mission on nov/xx/97. We were on approach to mtn flying the NDB to runway 15. We were being radar vectored by baltimore approach to the final approach course for the NDB runway 15. After we descended below the clouds and were on the approach, we were told to contact martin state tower while still outside the final approach fix (odors). We contacted martin state tower and were told to continue the approach. While descending on the approach at approximately 1000 ft MSL (mavie intersection) we had a UH1 helicopter fly directly over us within 100 ft. Neither baltimore approach or martin state tower advised us of the helicopter, which was in martin state's class D airspace. After the helicopter passed over us, we called tower and advised them of the near miss. Tower stated they weren't in contact with the helicopter. We continued the approach to a touch and go landing and then climbed out, after which we proceeded to contact baltimore approach. Baltimore approach asked us if we saw the helicopter which passed below us, apparently baltimore approach was talking to the helicopter, but weren't aware that the helicopter had not contacted martin state tower. The flight conditions were night VMC, we had all our exterior lights on and the helicopter had a search light on which I saw momentarily as he passed over us from left to right. I believe the helicopter should have been talking to martin state tower while in their airspace.

Original NASA ASRS Text

Title: EC130E MIL ACFT ON APCH HAD NMAC WITH UH1 WHICH WAS UNRPTED TO RPTR ACFT EITHER BY APCH CTLR OR THE TWR.

Narrative: I WAS FLYING AN EC130E ON A MIL TRAINING MISSION ON NOV/XX/97. WE WERE ON APCH TO MTN FLYING THE NDB TO RWY 15. WE WERE BEING RADAR VECTORED BY BALTIMORE APCH TO THE FINAL APCH COURSE FOR THE NDB RWY 15. AFTER WE DSNDED BELOW THE CLOUDS AND WERE ON THE APCH, WE WERE TOLD TO CONTACT MARTIN STATE TWR WHILE STILL OUTSIDE THE FINAL APCH FIX (ODORS). WE CONTACTED MARTIN STATE TWR AND WERE TOLD TO CONTINUE THE APCH. WHILE DSNDING ON THE APCH AT APPROX 1000 FT MSL (MAVIE INTXN) WE HAD A UH1 HELI FLY DIRECTLY OVER US WITHIN 100 FT. NEITHER BALTIMORE APCH OR MARTIN STATE TWR ADVISED US OF THE HELI, WHICH WAS IN MARTIN STATE'S CLASS D AIRSPACE. AFTER THE HELI PASSED OVER US, WE CALLED TWR AND ADVISED THEM OF THE NEAR MISS. TWR STATED THEY WEREN'T IN CONTACT WITH THE HELI. WE CONTINUED THE APCH TO A TOUCH AND GO LNDG AND THEN CLBED OUT, AFTER WHICH WE PROCEEDED TO CONTACT BALTIMORE APCH. BALTIMORE APCH ASKED US IF WE SAW THE HELI WHICH PASSED BELOW US, APPARENTLY BALTIMORE APCH WAS TALKING TO THE HELI, BUT WEREN'T AWARE THAT THE HELI HAD NOT CONTACTED MARTIN STATE TWR. THE FLT CONDITIONS WERE NIGHT VMC, WE HAD ALL OUR EXTERIOR LIGHTS ON AND THE HELI HAD A SEARCH LIGHT ON WHICH I SAW MOMENTARILY AS HE PASSED OVER US FROM L TO R. I BELIEVE THE HELI SHOULD HAVE BEEN TALKING TO MARTIN STATE TWR WHILE IN THEIR AIRSPACE.

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.

EC130E military aircraft on approach had near midair collision with UH1 which was unrpted to reporter aircraft either by approach controller or the tower.