Flight crew responds to GPWS during ILS approach to ome.

Attributes
ACN	444430
Time
Date	199907
Day	Fri
Local Time Of Day	0001 To 0600
Place
Locale Reference	airport : ome.airport
State Reference	AK
Altitude	msl single value : 2000
Environment
Flight Conditions	IMC
Weather Elements	Fog Rain
Light	Night
Aircraft 1
Controlling Facilities	artcc : zan.artcc tower : tpa.tower
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Operating Under FAR Part	Part 121
Navigation In Use	ils localizer & glide slope : 27 other vortac
Flight Phase	descent : approach
Route In Use	approach : instrument precision
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : flight engineer pilot : instrument pilot : multi engine
Experience	flight time last 90 days : 120 flight time total : 10500 flight time type : 300
ASRS Report	444430
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument pilot : multi engine
Events
Anomaly	aircraft equipment problem : less severe non adherence : clearance non adherence : published procedure other spatial deviation
Independent Detector	aircraft equipment : gpws other flight crewa other flight crewb
Resolutory Action	controller : issued new clearance flight crew : executed go around flight crew : exited adverse environment
Supplementary
Problem Areas	Chart Or Publication Aircraft Flight Crew Human Performance
Primary Problem	Aircraft

Narrative:

Received a GPWS warning of terrain and to immediately climb. We were on course at glide path intercept altitude or above. I immediately added maximum power, climbed and checked the speed brake stowed. The warning did not stop even with a high rate of climb, so I turned left to move out over the water. The warning soon stopped. I'd been warned regarding a small hill on approach that may set off the GPWS at times. Without knowing the true cause of the warning, I initiated a climb. When it didn't stop, I felt a turn toward the beach was necessary. We advised zan and climbed out to intercept the arc back in without incident.

Original NASA ASRS Text

Title: FLC RESPONDS TO GPWS DURING ILS APCH TO OME.

Narrative: RECEIVED A GPWS WARNING OF TERRAIN AND TO IMMEDIATELY CLB. WE WERE ON COURSE AT GLIDE PATH INTERCEPT ALT OR ABOVE. I IMMEDIATELY ADDED MAX PWR, CLBED AND CHKED THE SPD BRAKE STOWED. THE WARNING DID NOT STOP EVEN WITH A HIGH RATE OF CLB, SO I TURNED L TO MOVE OUT OVER THE WATER. THE WARNING SOON STOPPED. I'D BEEN WARNED REGARDING A SMALL HILL ON APCH THAT MAY SET OFF THE GPWS AT TIMES. WITHOUT KNOWING THE TRUE CAUSE OF THE WARNING, I INITIATED A CLB. WHEN IT DIDN'T STOP, I FELT A TURN TOWARD THE BEACH WAS NECESSARY. WE ADVISED ZAN AND CLBED OUT TO INTERCEPT THE ARC BACK IN WITHOUT INCIDENT.

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.