Small aircraft on training flight has gear up landing.

Attributes
ACN	294915
Time
Date	199501
Day	Thu
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : oxc
State Reference	CT
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	general aviation : personal
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	Part 91
Flight Phase	landing other
Person 1
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : commercial pilot : instrument
Experience	flight time last 90 days : 3 flight time total : 1247 flight time type : 700
ASRS Report	294915
Person 2
Affiliation	Other
Function	other personnel other
Qualification	other other : other pilot : commercial pilot : instrument pilot : cfi
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	other flight crewa
Resolutory Action	none taken : detected after the fact
Consequence	other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Flight was biannual review. Early in flight, breaker would trip before full retraction. This was cured when alternator breaker was reset. Flight continued as gear retracted properly. Continued maneuvers including 2 360-degree turns with gear retracted. Instructor called for a simulated emergency landing, after circling (above osc) and on downwind, we started gump check, he called 'gear already down.' I didn't look but did rest of check. We landed gear up without hearing a horn. 3 months (about) before horn was going off about 21-22 inches. I asked repair shop (who also operates hangar where plane is housed) to adjust it. They did, saying full adjustment wasn't possible without spending much more time and energy, so they just 'turned it down a little' awaiting the annual which should be done within a few months. In retrospect, horn didn't function on earlier flts. Factors: make own gump check and don't depend on another (even an instructor of very long experience). Look at gear light yourself. Horn should have been reported as not operating after adjustment. It really wasn't checked in operation and reported to repair shop.

Original NASA ASRS Text

Title: SMA ON TRAINING FLT HAS GEAR UP LNDG.

Narrative: FLT WAS BIANNUAL REVIEW. EARLY IN FLT, BREAKER WOULD TRIP BEFORE FULL RETRACTION. THIS WAS CURED WHEN ALTERNATOR BREAKER WAS RESET. FLT CONTINUED AS GEAR RETRACTED PROPERLY. CONTINUED MANEUVERS INCLUDING 2 360-DEG TURNS WITH GEAR RETRACTED. INSTRUCTOR CALLED FOR A SIMULATED EMER LNDG, AFTER CIRCLING (ABOVE OSC) AND ON DOWNWIND, WE STARTED GUMP CHK, HE CALLED 'GEAR ALREADY DOWN.' I DIDN'T LOOK BUT DID REST OF CHK. WE LANDED GEAR UP WITHOUT HEARING A HORN. 3 MONTHS (ABOUT) BEFORE HORN WAS GOING OFF ABOUT 21-22 INCHES. I ASKED REPAIR SHOP (WHO ALSO OPERATES HANGAR WHERE PLANE IS HOUSED) TO ADJUST IT. THEY DID, SAYING FULL ADJUSTMENT WASN'T POSSIBLE WITHOUT SPENDING MUCH MORE TIME AND ENERGY, SO THEY JUST 'TURNED IT DOWN A LITTLE' AWAITING THE ANNUAL WHICH SHOULD BE DONE WITHIN A FEW MONTHS. IN RETROSPECT, HORN DIDN'T FUNCTION ON EARLIER FLTS. FACTORS: MAKE OWN GUMP CHK AND DON'T DEPEND ON ANOTHER (EVEN AN INSTRUCTOR OF VERY LONG EXPERIENCE). LOOK AT GEAR LIGHT YOURSELF. HORN SHOULD HAVE BEEN RPTED AS NOT OPERATING AFTER ADJUSTMENT. IT REALLY WASN'T CHKED IN OP AND RPTED TO REPAIR SHOP.

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.