Narrative:

The event was due to severe windshear at 100 ft AGL -- possibly landing short. Approach to 300 ft normal (decision ht) -- moderate turbulence to 1000 ft AGL, then just light turbulence. WX 1 mi visibility -- moderate snow with blowing snow -- wind right cross by 30 degrees, 20 gusting 30 KTS. At 150 ft on approach, aircraft started to settle. Captain added power to stay on the GS. At about 100 ft AGL, wind shear alert system activated (aural and visual). Captain had applied full power. Aircraft touched down in first few ft of runway with full power to arrest the descent. The landing was a firm landing but no excessive loads were imposed upon aircraft. The runway was snow covered/partially but braking action was good. No wheel tracks noted in snow prior to runway. Upon inspection by crew, and later maintenance, no damage was found to aircraft. The electronic wind shear alert system worked excellently, giving an early warning and aiding in early reactions. An accident avoided by technology. Callback conversation with reporter revealed the following information: the reporting first officer states that this aircraft landed on the runway, just barely. A runway end light was found to have a missing globe, the bulb was intact and burning, but there was no broken glass to be found. Speculation is that a snow plow may have broken the globe, or any number of other aircraft. The reporter walked around the aircraft 3 times and found no damage. The captain called his chief pilot asking for guidance on this. The reply was, if the captain was satisfied that there was no damage, to continue on. There was an ord tower controller observing on the jumpseat who noted that the wind shear alert was operating and that the captain went to full power before touchdown. A first officer for the same air carrier was riding in the passenger cabin. At the terminal, he idented himself to the reporting first officer and expressed concern about the landing, thinking that the aircraft had not landed on the runway. He later went to the airport manager who mentioned this to the local newspaper. The reporting first officer has copies of the 2 articles printed about the airport mentioning this incident. The captain has received a letter of investigation from the salt lake FSDO, but the first officer has not. The pilot's air carrier and union safety office all have been notified. The reporter had to hold for WX minimums, 1 mi visibility. A dc-9 aircraft just ahead of the reporting aircraft said nothing about windshear on the CTAF. The reporting aircraft did announce this to the following aircraft. Supplemental information from acn 264618: ILS runway 18 on autoplt, localizer and GS tracking normally. Disengaged autoplt and autothrottles at 300 ft for a manual landing. Aircraft began to settle rapidly when leaving 150 ft. Power was applied to arrest sink, windshear alert sounded. Aircraft continued descending at a slower rate and touched down on runway near the end with a firm landing.

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Original NASA ASRS Text

Title: AN ACR B-757 LANDED HARD IN A WIND SHEAR.

Narrative: THE EVENT WAS DUE TO SEVERE WINDSHEAR AT 100 FT AGL -- POSSIBLY LNDG SHORT. APCH TO 300 FT NORMAL (DECISION HT) -- MODERATE TURB TO 1000 FT AGL, THEN JUST LIGHT TURB. WX 1 MI VISIBILITY -- MODERATE SNOW WITH BLOWING SNOW -- WIND R CROSS BY 30 DEGS, 20 GUSTING 30 KTS. AT 150 FT ON APCH, ACFT STARTED TO SETTLE. CAPT ADDED PWR TO STAY ON THE GS. AT ABOUT 100 FT AGL, WIND SHEAR ALERT SYS ACTIVATED (AURAL AND VISUAL). CAPT HAD APPLIED FULL PWR. ACFT TOUCHED DOWN IN FIRST FEW FT OF RWY WITH FULL PWR TO ARREST THE DSCNT. THE LNDG WAS A FIRM LNDG BUT NO EXCESSIVE LOADS WERE IMPOSED UPON ACFT. THE RWY WAS SNOW COVERED/PARTIALLY BUT BRAKING ACTION WAS GOOD. NO WHEEL TRACKS NOTED IN SNOW PRIOR TO RWY. UPON INSPECTION BY CREW, AND LATER MAINT, NO DAMAGE WAS FOUND TO ACFT. THE ELECTRONIC WIND SHEAR ALERT SYS WORKED EXCELLENTLY, GIVING AN EARLY WARNING AND AIDING IN EARLY REACTIONS. AN ACCIDENT AVOIDED BY TECHNOLOGY. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTING FO STATES THAT THIS ACFT LANDED ON THE RWY, JUST BARELY. A RWY END LIGHT WAS FOUND TO HAVE A MISSING GLOBE, THE BULB WAS INTACT AND BURNING, BUT THERE WAS NO BROKEN GLASS TO BE FOUND. SPECULATION IS THAT A SNOW PLOW MAY HAVE BROKEN THE GLOBE, OR ANY NUMBER OF OTHER ACFT. THE RPTR WALKED AROUND THE ACFT 3 TIMES AND FOUND NO DAMAGE. THE CAPT CALLED HIS CHIEF PLT ASKING FOR GUIDANCE ON THIS. THE REPLY WAS, IF THE CAPT WAS SATISFIED THAT THERE WAS NO DAMAGE, TO CONTINUE ON. THERE WAS AN ORD TWR CTLR OBSERVING ON THE JUMPSEAT WHO NOTED THAT THE WIND SHEAR ALERT WAS OPERATING AND THAT THE CAPT WENT TO FULL PWR BEFORE TOUCHDOWN. A FO FOR THE SAME ACR WAS RIDING IN THE PAX CABIN. AT THE TERMINAL, HE IDENTED HIMSELF TO THE RPTING FO AND EXPRESSED CONCERN ABOUT THE LNDG, THINKING THAT THE ACFT HAD NOT LANDED ON THE RWY. HE LATER WENT TO THE ARPT MGR WHO MENTIONED THIS TO THE LCL NEWSPAPER. THE RPTING FO HAS COPIES OF THE 2 ARTICLES PRINTED ABOUT THE ARPT MENTIONING THIS INCIDENT. THE CAPT HAS RECEIVED A LETTER OF INVESTIGATION FROM THE SALT LAKE FSDO, BUT THE FO HAS NOT. THE PLT'S ACR AND UNION SAFETY OFFICE ALL HAVE BEEN NOTIFIED. THE RPTR HAD TO HOLD FOR WX MINIMUMS, 1 MI VISIBILITY. A DC-9 ACFT JUST AHEAD OF THE RPTING ACFT SAID NOTHING ABOUT WINDSHEAR ON THE CTAF. THE RPTING ACFT DID ANNOUNCE THIS TO THE FOLLOWING ACFT. SUPPLEMENTAL INFO FROM ACN 264618: ILS RWY 18 ON AUTOPLT, LOC AND GS TRACKING NORMALLY. DISENGAGED AUTOPLT AND AUTOTHROTTLES AT 300 FT FOR A MANUAL LNDG. ACFT BEGAN TO SETTLE RAPIDLY WHEN LEAVING 150 FT. PWR WAS APPLIED TO ARREST SINK, WINDSHEAR ALERT SOUNDED. ACFT CONTINUED DSNDING AT A SLOWER RATE AND TOUCHED DOWN ON RWY NEAR THE END WITH A FIRM LNDG.

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.