Pilot landed gear up thinking he was hearing the stall warning.

Attributes
ACN	285874
Time
Date	199410
Day	Sat
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : ryn
State Reference	AZ
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : hgr
Operator	general aviation : personal
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	Part 91
Flight Phase	landing other
Flight Plan	None
Person 1
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : instrument pilot : private
Experience	flight time last 90 days : 60 flight time total : 975 flight time type : 250
ASRS Report	285874
Person 2
Affiliation	government : faa
Function	controller : local
Qualification	controller : non radar
Events
Anomaly	non adherence : far other anomaly other
Independent Detector	other other : unspecified cockpit
Resolutory Action	none taken : detected after the fact
Consequence	other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

This accident/incident has been reported to NTSB, however, some aspects are related to potential safety and are reported herein. The incident involved pilot overlooking to put gear down. Aircraft landed on runway with wheels up. Propeller and under carriage panels damaged. No one injured. The stall warning horn signal and that emitted by gear-up signal are very close in tonal character. Gear-up horn sounds when power is reduced to 14 inches and gear is still up. On the day of the incident, strong winds (20 mph G 26 mph) down the runway were producing sufficient turbulence to have pilot think that what he heard when turning final was an imminent stall from the buffeting wind. In reality, it was the gear-up horn which soon stopped as pilot lowered nose and applied more power. Continued headwind negated any further reduction of power until near the runway and flare when stall warning normally is heard before touchdown. My suggestion is that the gear-up warning signal be mandated to be both more audible and of such different tonal character to be readily recognized. I have signoff's in 5 different rg complex aircraft, and in retrospect, I could have repeated this accident in any one of them without significant intervention of the gear-up warning.

Original NASA ASRS Text

Title: PLT LANDED GEAR UP THINKING HE WAS HEARING THE STALL WARNING.

Narrative: THIS ACCIDENT/INCIDENT HAS BEEN RPTED TO NTSB, HOWEVER, SOME ASPECTS ARE RELATED TO POTENTIAL SAFETY AND ARE RPTED HEREIN. THE INCIDENT INVOLVED PLT OVERLOOKING TO PUT GEAR DOWN. ACFT LANDED ON RWY WITH WHEELS UP. PROP AND UNDER CARRIAGE PANELS DAMAGED. NO ONE INJURED. THE STALL WARNING HORN SIGNAL AND THAT EMITTED BY GEAR-UP SIGNAL ARE VERY CLOSE IN TONAL CHARACTER. GEAR-UP HORN SOUNDS WHEN PWR IS REDUCED TO 14 INCHES AND GEAR IS STILL UP. ON THE DAY OF THE INCIDENT, STRONG WINDS (20 MPH G 26 MPH) DOWN THE RWY WERE PRODUCING SUFFICIENT TURB TO HAVE PLT THINK THAT WHAT HE HEARD WHEN TURNING FINAL WAS AN IMMINENT STALL FROM THE BUFFETING WIND. IN REALITY, IT WAS THE GEAR-UP HORN WHICH SOON STOPPED AS PLT LOWERED NOSE AND APPLIED MORE PWR. CONTINUED HEADWIND NEGATED ANY FURTHER REDUCTION OF PWR UNTIL NEAR THE RWY AND FLARE WHEN STALL WARNING NORMALLY IS HEARD BEFORE TOUCHDOWN. MY SUGGESTION IS THAT THE GEAR-UP WARNING SIGNAL BE MANDATED TO BE BOTH MORE AUDIBLE AND OF SUCH DIFFERENT TONAL CHARACTER TO BE READILY RECOGNIZED. I HAVE SIGNOFF'S IN 5 DIFFERENT RG COMPLEX ACFT, AND IN RETROSPECT, I COULD HAVE REPEATED THIS ACCIDENT IN ANY ONE OF THEM WITHOUT SIGNIFICANT INTERVENTION OF THE GEAR-UP WARNING.

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.