Air carrier medium large transport encounters wind shear while landing at pdx, resulting in a go around, during which tower issued an altitude restriction which was overshot due to the high rate of climb and the lateness of instruction.

Home

Browse by month

Random

Latest

About

Contact

Attributes
ACN	135980
Time
Date	199002
Day	Sun
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : pdx
State Reference	OR
Altitude	agl bound lower : 100 agl bound upper : 2900
Environment
Flight Conditions	IMC
Light	Night
Aircraft 1
Controlling Facilities	tower : pdx
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Navigation In Use	Other
Flight Phase	landing : go around landing : missed approach landing other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 150 flight time total : 7000 flight time type : 750
ASRS Report	135980
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
Events
Anomaly	altitude deviation : overshoot inflight encounter : weather other anomaly other anomaly other
Independent Detector	other flight crewa
Resolutory Action	flight crew : regained aircraft control flight crew : returned to intended course or assigned course other
Consequence	Other
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	other

Narrative:

During approach to pdx we encountered a wind shear of about 15 KTS at 100' AGL. At the same time my first officer who was flying encountered a gust of wind that raised the right wing. He immediately corrected, but ran out of aileron and I told him to go around. We were having difficulty in controling the airplane at first. We were very lightly loaded, and applying maximum power we soon climbed at 6000 FPM. We were prepared to execute the missed approach for ILS 10R with a left turn and climb to 4000'. At 1500' the tower noticed we were going around and told us to level off at 2000'. Due to the initial ctlability, and high climb rate, we overshot our 2000' altitude by 900', at which time we reversed our climb and descended to 2000'. Tower asked us if we needed any assistance and we felt like the situation was under control and said so. The rest of the go around and landing at pdx while not routing due to the gusty winds was uneventful. WX at present time, 6000' overcast, 10 winds were 140-170 degrees at 22-30 KTS.

Original NASA ASRS Text

Title: ACR MLG ENCOUNTERS WIND SHEAR WHILE LNDG AT PDX, RESULTING IN A GO AROUND, DURING WHICH TWR ISSUED AN ALT RESTRICTION WHICH WAS OVERSHOT DUE TO THE HIGH RATE OF CLIMB AND THE LATENESS OF INSTRUCTION.

Narrative: DURING APCH TO PDX WE ENCOUNTERED A WIND SHEAR OF ABOUT 15 KTS AT 100' AGL. AT THE SAME TIME MY F/O WHO WAS FLYING ENCOUNTERED A GUST OF WIND THAT RAISED THE RIGHT WING. HE IMMEDIATELY CORRECTED, BUT RAN OUT OF AILERON AND I TOLD HIM TO GO AROUND. WE WERE HAVING DIFFICULTY IN CTLING THE AIRPLANE AT FIRST. WE WERE VERY LIGHTLY LOADED, AND APPLYING MAX PWR WE SOON CLBED AT 6000 FPM. WE WERE PREPARED TO EXECUTE THE MISSED APCH FOR ILS 10R WITH A LEFT TURN AND CLB TO 4000'. AT 1500' THE TWR NOTICED WE WERE GOING AROUND AND TOLD US TO LEVEL OFF AT 2000'. DUE TO THE INITIAL CTLABILITY, AND HIGH CLB RATE, WE OVERSHOT OUR 2000' ALT BY 900', AT WHICH TIME WE REVERSED OUR CLB AND DSNDED TO 2000'. TWR ASKED US IF WE NEEDED ANY ASSISTANCE AND WE FELT LIKE THE SITUATION WAS UNDER CONTROL AND SAID SO. THE REST OF THE GAR AND LNDG AT PDX WHILE NOT ROUTING DUE TO THE GUSTY WINDS WAS UNEVENTFUL. WX AT PRESENT TIME, 6000' OVCST, 10 WINDS WERE 140-170 DEGS AT 22-30 KTS.

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.