Hard landing in a B-757. Low level wind shear.

Attributes
ACN	272236
Time
Date	199405
Day	Wed
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : las
State Reference	NV
Altitude	agl bound lower : 0 agl bound upper : 100
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	B757 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	descent : approach landing other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : flight engineer pilot : commercial pilot : instrument
ASRS Report	272236
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : commercial pilot : flight engineer pilot : instrument pilot : atp
Experience	flight time last 90 days : 220 flight time total : 19000 flight time type : 5000
ASRS Report	272863
Events
Anomaly	inflight encounter other non adherence other other anomaly other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	none taken : insufficient time
Consequence	other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

On approach runway 26L las with captain flying jet, captain made hard landing. The wind according to tower and ATIS was about 150 degrees at 4 KTS. At 500 ft AGL, jet was on ILS GS and centerline. I told the captain we had a left quartering tailwind of about 17 KTS. At 500 ft AGL, asked for wind check and was told same as before (150 degrees at 4 KTS). Around 300 ft AGL again told captain of 17 KT quartering tailwind. I was reading off radar altitude to captain. He added power just before hard touchdown. Jet bounced and hit hard again. No damage to jet. After we were at the gate, another captain from another flight stopped by to say, 'tower was now calling winds at plus 19 KTS and 'landing runway 19.' suspect airport was giving false winds to use west runways. Even so, I told captain of our correct winds at least twice, and he chose to disregard me. To prevent another occurrence, I suggest the old fart retire. Supplemental information from acn 272863: landing runway 25L las, tower report winds 110 at 4 KTS. Upon landing, I was hit with an estimated tailwind of 20 plus KTS. Power was added twice in the last 100 ft, but was not enough to arrest the sink. A hard landing ensued. No passenger injuries, no oxygen masks dropped, no tires blown, no rivets popped. 3 flight attendants reported back spasms. All 3 in rear of aircraft. After inspection, aircraft flown on to slc with revenue passenger.

Original NASA ASRS Text

Title: HARD LNDG IN A B-757. LOW LEVEL WIND SHEAR.

Narrative: ON APCH RWY 26L LAS WITH CAPT FLYING JET, CAPT MADE HARD LNDG. THE WIND ACCORDING TO TWR AND ATIS WAS ABOUT 150 DEGS AT 4 KTS. AT 500 FT AGL, JET WAS ON ILS GS AND CTRLINE. I TOLD THE CAPT WE HAD A L QUARTERING TAILWIND OF ABOUT 17 KTS. AT 500 FT AGL, ASKED FOR WIND CHK AND WAS TOLD SAME AS BEFORE (150 DEGS AT 4 KTS). AROUND 300 FT AGL AGAIN TOLD CAPT OF 17 KT QUARTERING TAILWIND. I WAS READING OFF RADAR ALT TO CAPT. HE ADDED PWR JUST BEFORE HARD TOUCHDOWN. JET BOUNCED AND HIT HARD AGAIN. NO DAMAGE TO JET. AFTER WE WERE AT THE GATE, ANOTHER CAPT FROM ANOTHER FLT STOPPED BY TO SAY, 'TWR WAS NOW CALLING WINDS AT PLUS 19 KTS AND 'LNDG RWY 19.' SUSPECT ARPT WAS GIVING FALSE WINDS TO USE W RWYS. EVEN SO, I TOLD CAPT OF OUR CORRECT WINDS AT LEAST TWICE, AND HE CHOSE TO DISREGARD ME. TO PREVENT ANOTHER OCCURRENCE, I SUGGEST THE OLD FART RETIRE. SUPPLEMENTAL INFO FROM ACN 272863: LNDG RWY 25L LAS, TWR RPT WINDS 110 AT 4 KTS. UPON LNDG, I WAS HIT WITH AN ESTIMATED TAILWIND OF 20 PLUS KTS. PWR WAS ADDED TWICE IN THE LAST 100 FT, BUT WAS NOT ENOUGH TO ARREST THE SINK. A HARD LNDG ENSUED. NO PAX INJURIES, NO OXYGEN MASKS DROPPED, NO TIRES BLOWN, NO RIVETS POPPED. 3 FLT ATTENDANTS RPTED BACK SPASMS. ALL 3 IN REAR OF ACFT. AFTER INSPECTION, ACFT FLOWN ON TO SLC WITH REVENUE PAX.

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.