The reporter was turned south by taipei control and assigned 5000 ft where the terrain was known to be 4000 ft to 6000 ft. This was inconsistent with known taipei procedures for runway 5, which are normally a westerly vector. The GPWS warning prompted the crew to climb to 7000 ft. Taipei control then turned the reporter westerly and cleared the reporter back to 5000 ft.

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Attributes
ACN	325047
Time
Date	199601
Day	Mon
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : apu airport : rctp
State Reference	FO
Altitude	msl bound lower : 5000 msl bound upper : 7000
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : rctp tower : avl
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
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 : 50 flight time total : 9000 flight time type : 400
ASRS Report	325047
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
Events
Anomaly	altitude deviation : excursion from assigned altitude non adherence : clearance other anomaly other other spatial deviation
Independent Detector	aircraft equipment other aircraft equipment : unspecified
Resolutory Action	flight crew : declared emergency flight crew : took evasive action
Consequence	faa : reviewed incident with flight crew
Supplementary
Air Traffic Incident	other

Narrative:

Our flight was from narita (rjaa) to taipei (rctp). Naha control handed us off to taipei control. They had radar contact and cleared us to APU by A-1. We were then cleared to 5000 ft, no speed restrs. We were on the APU 232 degree radial approaching APU at 340 KTS. We were then told to turn to a heading of 200 degrees. I told the first officer that this was strange since there were mountains in that direction. Also, taipei was using runway 5 so they usually turned us west over the water to parallel the coast. As we approached 5000 ft the GPWS sounded and we did the escape maneuver to 7000 ft. I informed center we were climbing to 7000 ft because of the GPWS and he gave us a heading of 250 degrees and 5000 ft. I again said we got the GPWS and were at 7000 ft. Nothing more was said and we landed with no further problems. Mountains within about 25 NM of APU range from 4000 ft to 6000 ft. I don't think the controller ever understood why we climbed to 7000 ft.

Original NASA ASRS Text

Title: THE RPTR WAS TURNED S BY TAIPEI CTL AND ASSIGNED 5000 FT WHERE THE TERRAIN WAS KNOWN TO BE 4000 FT TO 6000 FT. THIS WAS INCONSISTENT WITH KNOWN TAIPEI PROCS FOR RWY 5, WHICH ARE NORMALLY A WESTERLY VECTOR. THE GPWS WARNING PROMPTED THE CREW TO CLB TO 7000 FT. TAIPEI CTL THEN TURNED THE RPTR WESTERLY AND CLRED THE RPTR BACK TO 5000 FT.

Narrative: OUR FLT WAS FROM NARITA (RJAA) TO TAIPEI (RCTP). NAHA CTL HANDED US OFF TO TAIPEI CTL. THEY HAD RADAR CONTACT AND CLRED US TO APU BY A-1. WE WERE THEN CLRED TO 5000 FT, NO SPD RESTRS. WE WERE ON THE APU 232 DEG RADIAL APCHING APU AT 340 KTS. WE WERE THEN TOLD TO TURN TO A HDG OF 200 DEGS. I TOLD THE FO THAT THIS WAS STRANGE SINCE THERE WERE MOUNTAINS IN THAT DIRECTION. ALSO, TAIPEI WAS USING RWY 5 SO THEY USUALLY TURNED US W OVER THE WATER TO PARALLEL THE COAST. AS WE APCHED 5000 FT THE GPWS SOUNDED AND WE DID THE ESCAPE MANEUVER TO 7000 FT. I INFORMED CTR WE WERE CLBING TO 7000 FT BECAUSE OF THE GPWS AND HE GAVE US A HDG OF 250 DEGS AND 5000 FT. I AGAIN SAID WE GOT THE GPWS AND WERE AT 7000 FT. NOTHING MORE WAS SAID AND WE LANDED WITH NO FURTHER PROBS. MOUNTAINS WITHIN ABOUT 25 NM OF APU RANGE FROM 4000 FT TO 6000 FT. I DON'T THINK THE CTLR EVER UNDERSTOOD WHY WE CLBED TO 7000 FT.

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.