|37000 Feet||Browse and search NASA's
Aviation Safety Reporting System
|Local Time Of Day||1801 To 2400|
|Locale Reference||airport : bwi|
|Altitude||msl bound lower : 3000|
msl bound upper : 3500
|Controlling Facilities||tracon : bwi|
|Operator||common carrier : air carrier|
|Make Model Name||Medium Large Transport, Low Wing, 2 Turbojet Eng|
|Flight Phase||cruise other|
|Route In Use||enroute : on vectors|
|Make Model Name||Helicopter|
|Flight Phase||cruise other|
|Affiliation||company : air carrier|
|Function||flight crew : captain|
oversight : pic
|Qualification||pilot : atp|
|Experience||flight time last 90 days : 125|
flight time total : 8000
|Anomaly||conflict : nmac|
|Independent Detector||other flight crewa|
|Resolutory Action||flight crew : took evasive action|
|Miss Distance||vertical : 500|
|Primary Problem||Flight Crew Human Performance|
After receiving a heading of 250 degrees and assigned altitude of 3000' had tuned ILS frequency for runway 10 at bwi. Was checking identification for same. Returned scan to outside cockpit and noticed rotating beacons and navigation lights of 2 slow moving aircraft in very close proximity to our aircraft. Initiated immediate pullup climbing maneuver for evasive action and to avoid what I consider would have been a midair collision. Did not notice any evasive action by other aircraft involved in this incident. The 2 helicopters were on an approximately 180 degree heading and one low at 2500-2700'. The other, higher at 2700-3000', as it appeared to our cockpit reference point, in line with center of forward/right windshield and level with horizon. Evasive action required 500' climb, airspeed 210 KTS assigned. To prevent recurrence, I think a more restricting TCA should be implemented in the bwi, dca, dulles airport areas, requiring exiting aircraft from all groups of aviation to be under positive control.
Original NASA ASRS Text
Title: CLOSE PROX ACR-MLG FLT OF 2 MIL-HELICOPTERS.
Narrative: AFTER RECEIVING A HDG OF 250 DEGS AND ASSIGNED ALT OF 3000' HAD TUNED ILS FREQ FOR RWY 10 AT BWI. WAS CHKING ID FOR SAME. RETURNED SCAN TO OUTSIDE COCKPIT AND NOTICED ROTATING BEACONS AND NAV LIGHTS OF 2 SLOW MOVING ACFT IN VERY CLOSE PROX TO OUR ACFT. INITIATED IMMEDIATE PULLUP CLBING MANEUVER FOR EVASIVE ACTION AND TO AVOID WHAT I CONSIDER WOULD HAVE BEEN A MIDAIR COLLISION. DID NOT NOTICE ANY EVASIVE ACTION BY OTHER ACFT INVOLVED IN THIS INCIDENT. THE 2 HELIS WERE ON AN APPROX 180 DEG HDG AND ONE LOW AT 2500-2700'. THE OTHER, HIGHER AT 2700-3000', AS IT APPEARED TO OUR COCKPIT REFERENCE POINT, IN LINE WITH CENTER OF FORWARD/RIGHT WINDSHIELD AND LEVEL WITH HORIZON. EVASIVE ACTION REQUIRED 500' CLB, AIRSPD 210 KTS ASSIGNED. TO PREVENT RECURRENCE, I THINK A MORE RESTRICTING TCA SHOULD BE IMPLEMENTED IN THE BWI, DCA, DULLES ARPT AREAS, REQUIRING EXITING ACFT FROM ALL GROUPS OF AVIATION TO BE UNDER POSITIVE CTL.
Data retrieved from NASA's ASRS site as of August 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.