Air carrier X GPWS executed climb.

Attributes
ACN	294883
Time
Date	199501
Day	Thu
Local Time Of Day	1801 To 2400
Place
Locale Reference	atc facility : oak
State Reference	CA
Altitude	msl bound lower : 3100 msl bound upper : 3100
Environment
Flight Conditions	IMC
Light	Night
Aircraft 1
Controlling Facilities	tracon : oak
Operator	common carrier : air carrier
Make Model Name	B727 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	descent other
Route In Use	enroute : on vectors
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 60 flight time total : 10000
ASRS Report	294883
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 150 flight time total : 10300 flight time type : 3500
ASRS Report	294895
Events
Anomaly	other spatial deviation
Independent Detector	aircraft equipment other aircraft equipment : unspecified
Resolutory Action	flight crew : took evasive action
Consequence	faa : reviewed incident with flight crew
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	other

Narrative:

Air carrier X was cleared to 3000 ft while being vectored for the oak ILS to runway 11. I was rounding the aircraft off at 3100 ft and 800 FPM. We got 'terrain, terrain, terrain, whoop pull up, whoop whoop pull up, terrain.' executed GPWS escape maneuver -- pulled up and went to firewall power for approximately 10 seconds and climbed to approximately 4000 ft then was reclred back to 3000 ft. We called in the incident to bay approach and the controller said there was an antenna out there in our area. Just prior to this there was a discussion from bay to another aircraft about a discrepancy between his altitude and his mode C readout. Could ATC have the wrong altimeter setting? Supplemental information from acn 294895: our aircraft was in contact with bay approach in IMC conditions. We had been cleared to descend to 3000 ft MSL. While descending at approximately 800 FPM, we got a 'hard' GPWS warning at about 3100 ft MSL. Altimeters were set at the 30.16 oak local. Our position was approximately 9 DME oak 320 degree radial. Captain immediately executed 'escape' maneuver per company procedures. Bay approach reclred flight to descend to 3000 ft commenting that the antennas in the vicinity probably caused the warning. Sfo area chart shows 3100 ft terrain clearance in that area suggest raising MVA in that area to 3500 ft MSL.

Original NASA ASRS Text

Title: ACR X GPWS EXECUTED CLB.

Narrative: ACR X WAS CLRED TO 3000 FT WHILE BEING VECTORED FOR THE OAK ILS TO RWY 11. I WAS ROUNDING THE ACFT OFF AT 3100 FT AND 800 FPM. WE GOT 'TERRAIN, TERRAIN, TERRAIN, WHOOP PULL UP, WHOOP WHOOP PULL UP, TERRAIN.' EXECUTED GPWS ESCAPE MANEUVER -- PULLED UP AND WENT TO FIREWALL PWR FOR APPROX 10 SECONDS AND CLBED TO APPROX 4000 FT THEN WAS RECLRED BACK TO 3000 FT. WE CALLED IN THE INCIDENT TO BAY APCH AND THE CTLR SAID THERE WAS AN ANTENNA OUT THERE IN OUR AREA. JUST PRIOR TO THIS THERE WAS A DISCUSSION FROM BAY TO ANOTHER ACFT ABOUT A DISCREPANCY BTWN HIS ALT AND HIS MODE C READOUT. COULD ATC HAVE THE WRONG ALTIMETER SETTING? SUPPLEMENTAL INFO FROM ACN 294895: OUR ACFT WAS IN CONTACT WITH BAY APCH IN IMC CONDITIONS. WE HAD BEEN CLRED TO DSND TO 3000 FT MSL. WHILE DSNDING AT APPROX 800 FPM, WE GOT A 'HARD' GPWS WARNING AT ABOUT 3100 FT MSL. ALTIMETERS WERE SET AT THE 30.16 OAK LCL. OUR POS WAS APPROX 9 DME OAK 320 DEG RADIAL. CAPT IMMEDIATELY EXECUTED 'ESCAPE' MANEUVER PER COMPANY PROCS. BAY APCH RECLRED FLT TO DSND TO 3000 FT COMMENTING THAT THE ANTENNAS IN THE VICINITY PROBABLY CAUSED THE WARNING. SFO AREA CHART SHOWS 3100 FT TERRAIN CLRNC IN THAT AREA SUGGEST RAISING MVA IN THAT AREA TO 3500 FT MSL.

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.