Light twin engine aircraft on training flight lands gear up despite gear down and locked indications...

Attributes
ACN	114080
Time
Date	198905
Day	Sun
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : hyw
State Reference	SC
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	common carrier : air taxi
Make Model Name	Small Aircraft, Low Wing, 2 Eng, Retractable Gear
Flight Phase	landing other other
Flight Plan	None
Person 1
Affiliation	Other
Function	instruction : trainee
Qualification	pilot : commercial
Experience	flight time total : 326 flight time type : 10
ASRS Report	114080
Person 2
Affiliation	company : air taxi
Function	instruction : instructor
Qualification	pilot : cfi pilot : commercial
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	other flight crewa
Resolutory Action	none taken : anomaly accepted
Consequence	other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation other

Narrative:

We had been training in multi-engine emergency procedures. Stalls, slow flight, single engine out procedures, and made several instrument apches and lndgs. On the second from last landing after placing the landing gear selector in the down position and not receiving a 3 green gear down indication, I manually brought the gear down. After a period of approximately 15-30 seconds had passed, we saw a 3 green gear down and lock indication. From this point we continued the landing and executed a touch and go. On the next approach to landing we did not notice any problems from the gear or gear down indicator light and executed another touch and go. On the very last landing, while attempting to execute a short field approach to landing, I landed the small aircraft with its landing gear in the up position after having confirmed a 3 green gear down indication on the gear indicator with my instructor, and not hearing a gear unsafe warning horn after applying full flaps and reducing the throttles both to idle. Prior to touchdown, my instructor and I had no indication that the gear was not down and locked until after we landed and the aircraft came to a stop. The mirror normally installed on the aircraft to check nose gear extension was not installed at the time of the incident.

Original NASA ASRS Text

Title: LIGHT TWIN ENGINE ACFT ON TRAINING FLT LANDS GEAR UP DESPITE GEAR DOWN AND LOCKED INDICATIONS.

Narrative: WE HAD BEEN TRAINING IN MULTI-ENGINE EMER PROCS. STALLS, SLOW FLT, SINGLE ENGINE OUT PROCS, AND MADE SEVERAL INSTRUMENT APCHES AND LNDGS. ON THE SECOND FROM LAST LNDG AFTER PLACING THE LNDG GEAR SELECTOR IN THE DOWN POSITION AND NOT RECEIVING A 3 GREEN GEAR DOWN INDICATION, I MANUALLY BROUGHT THE GEAR DOWN. AFTER A PERIOD OF APPROX 15-30 SECONDS HAD PASSED, WE SAW A 3 GREEN GEAR DOWN AND LOCK INDICATION. FROM THIS POINT WE CONTINUED THE LNDG AND EXECUTED A TOUCH AND GO. ON THE NEXT APCH TO LNDG WE DID NOT NOTICE ANY PROBLEMS FROM THE GEAR OR GEAR DOWN INDICATOR LIGHT AND EXECUTED ANOTHER TOUCH AND GO. ON THE VERY LAST LNDG, WHILE ATTEMPTING TO EXECUTE A SHORT FIELD APCH TO LNDG, I LANDED THE SMA WITH ITS LNDG GEAR IN THE UP POSITION AFTER HAVING CONFIRMED A 3 GREEN GEAR DOWN INDICATION ON THE GEAR INDICATOR WITH MY INSTRUCTOR, AND NOT HEARING A GEAR UNSAFE WARNING HORN AFTER APPLYING FULL FLAPS AND REDUCING THE THROTTLES BOTH TO IDLE. PRIOR TO TOUCHDOWN, MY INSTRUCTOR AND I HAD NO INDICATION THAT THE GEAR WAS NOT DOWN AND LOCKED UNTIL AFTER WE LANDED AND THE ACFT CAME TO A STOP. THE MIRROR NORMALLY INSTALLED ON THE ACFT TO CHECK NOSE GEAR EXTENSION WAS NOT INSTALLED AT THE TIME OF THE INCIDENT.

Data retrieved from NASA's ASRS site as of August 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.