Narrative:

Pilot entered 45 degrees for 29 at hanscom under moderate turbulent conditions. Tower addressed aircraft, reporting that wind shear was possible. Pilot set up for fast no flap landing. Upon turning base to final, tower advised pilot that aircraft in front had lost 10 KTS airspeed. At this pint, after turning final, pilot was struggling to keep aircraft level. Stall light kept flickering, rapid gains and losses in airspeed. Pilot also heard what he mistook to be stall warning horn, but was in fact gear warning. Pilot noticed excessive glide over runway, which he attributed to fluctuating winds. While a slight tailwind might have contributed to long glide before flare, the landing gear up must have added because of the reduced drag. Pilot landed with gear up and came to a rest midway down 29. There were 3 passenger and 1 pilot. All escaped injury. While a checklist was performed during the approach phase (downwind, to be specific), the pilot was continually distracted by strong turbulence and the questions of his passenger--2 of whom had not flown in light aircraft before. While the pilot forgot to place the gear in the down position, the automatic-retract system failed to compensate. It would be helpful if the gear would extend, and remain in the down position if any of the criteria for a possible gear up are met, such as slowed airspeed and low manifold pressure. Pilots should then be required to consciously trip a switch to retract the gear.

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Original NASA ASRS Text

Title: GA SMA GEAR UP LNDG. PLT WAS CONCERNED ABOUT WIND SHEAR REPORT AND FORGOT THE GEAR.

Narrative: PLT ENTERED 45 DEGS FOR 29 AT HANSCOM UNDER MODERATE TURBULENT CONDITIONS. TWR ADDRESSED ACFT, RPTING THAT WIND SHEAR WAS POSSIBLE. PLT SET UP FOR FAST NO FLAP LNDG. UPON TURNING BASE TO FINAL, TWR ADVISED PLT THAT ACFT IN FRONT HAD LOST 10 KTS AIRSPD. AT THIS PINT, AFTER TURNING FINAL, PLT WAS STRUGGLING TO KEEP ACFT LEVEL. STALL LIGHT KEPT FLICKERING, RAPID GAINS AND LOSSES IN AIRSPD. PLT ALSO HEARD WHAT HE MISTOOK TO BE STALL WARNING HORN, BUT WAS IN FACT GEAR WARNING. PLT NOTICED EXCESSIVE GLIDE OVER RWY, WHICH HE ATTRIBUTED TO FLUCTUATING WINDS. WHILE A SLIGHT TAILWIND MIGHT HAVE CONTRIBUTED TO LONG GLIDE BEFORE FLARE, THE LNDG GEAR UP MUST HAVE ADDED BECAUSE OF THE REDUCED DRAG. PLT LANDED WITH GEAR UP AND CAME TO A REST MIDWAY DOWN 29. THERE WERE 3 PAX AND 1 PLT. ALL ESCAPED INJURY. WHILE A CHKLIST WAS PERFORMED DURING THE APCH PHASE (DOWNWIND, TO BE SPECIFIC), THE PLT WAS CONTINUALLY DISTRACTED BY STRONG TURB AND THE QUESTIONS OF HIS PAX--2 OF WHOM HAD NOT FLOWN IN LIGHT ACFT BEFORE. WHILE THE PLT FORGOT TO PLACE THE GEAR IN THE DOWN POS, THE AUTO-RETRACT SYS FAILED TO COMPENSATE. IT WOULD BE HELPFUL IF THE GEAR WOULD EXTEND, AND REMAIN IN THE DOWN POS IF ANY OF THE CRITERIA FOR A POSSIBLE GEAR UP ARE MET, SUCH AS SLOWED AIRSPD AND LOW MANIFOLD PRESSURE. PLTS SHOULD THEN BE REQUIRED TO CONSCIOUSLY TRIP A SWITCH TO RETRACT THE GEAR.

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.