Traffic conflict between helicopters and a B737 on approach to jnu.

Attributes
ACN	481648
Time
Date	200008
Day	Sun
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : jnu.airport
State Reference	AK
Altitude	msl single value : 1900
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : 0r9.tower
Operator	common carrier : air carrier
Make Model Name	B737-400
Operating Under FAR Part	Part 121
Navigation In Use	Other
Flight Phase	descent : approach
Route In Use	approach : instrument non precision
Flight Plan	VFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	Helicopter
Operating Under FAR Part	Part 135
Navigation In Use	other
Flight Phase	climbout : intermediate altitude
Flight Plan	VFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 225 flight time total : 18400 flight time type : 8400
ASRS Report	481648
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : multi engine pilot : instrument pilot : commercial
Events
Anomaly	conflict : airborne critical other anomaly other
Independent Detector	aircraft equipment : tcas other flight crewa
Resolutory Action	flight crew : took evasive action
Supplementary
Problem Areas	Weather Flight Crew Human Performance Airspace Structure ATC Facility
Primary Problem	Flight Crew Human Performance
Situations
ATC Facility	procedure or policy : jnu.tower

Narrative:

Descending on the rnp RNAV runway 26 approach, jnu tower advised us of a flight of 4 helicopters departing eastbound. Passing through 1900 ft, we got a TCASII RA to descend as the last of the 4 helicopters crossed the gastineau channel directly in front of us at our altitude. We responded immediately to the TCASII RA, and called the traffic in sight. Due to the extremely high volume of helicopter traffic in the gastineau channel, I foresee another fatal midair collision unless changes in helicopter routing are made immediately.

Original NASA ASRS Text

Title: TFC CONFLICT BTWN HELIS AND A B737 ON APCH TO JNU.

Narrative: DSNDING ON THE RNP RNAV RWY 26 APCH, JNU TWR ADVISED US OF A FLT OF 4 HELIS DEPARTING EBOUND. PASSING THROUGH 1900 FT, WE GOT A TCASII RA TO DSND AS THE LAST OF THE 4 HELIS CROSSED THE GASTINEAU CHANNEL DIRECTLY IN FRONT OF US AT OUR ALT. WE RESPONDED IMMEDIATELY TO THE TCASII RA, AND CALLED THE TFC IN SIGHT. DUE TO THE EXTREMELY HIGH VOLUME OF HELI TFC IN THE GASTINEAU CHANNEL, I FORESEE ANOTHER FATAL MIDAIR COLLISION UNLESS CHANGES IN HELI ROUTING ARE MADE IMMEDIATELY.

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.