Small aircraft spi has circuit breaker on gear pop when trying to extend the landing gear. After sev...

Attributes
ACN	338520
Time
Date	199606
Day	Sat
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : ddp
State Reference	PR
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	Part 91
Flight Phase	descent : approach landing other
Flight Plan	None
Person 1
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : student
Experience	flight time last 90 days : 60 flight time total : 101 flight time type : 60
ASRS Report	338520
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	none taken : unable
Consequence	other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

After a thorough preflight inspection at or about XA00 local time, using the manufacturer's checklist, I departed to practice some touch and goes. On downwind, the airspeed indicator malfunctioned and I decided to land and have the instrument checked out by mechanics. Upon the usual gump check, the landing gear did not want to come down, popping the circuit breaker (no 3 green lights). The same happened on base and final. I did a go around and the breaker popped out in downwind and base again. On final I got the 3 green lights and I decided to land at the usual and normal approach and landing speed using visual reference and sound as trained to do and as I have always done in the past. Being VFR I depend more on outside reference than instruments. I had a similar problem few months ago and the manufacturer had to send me a new set of lights and were installed accordingly. When I touched beyond the numbers, the main gear collapsed forcing me to skid down the runway. I came to an abrupt stop. Thereafter, and calmly, I turned off all switches, the fuel selector was turned off, unfastened my seat belts and walked out.

Original NASA ASRS Text

Title: SMA SPI HAS CIRCUIT BREAKER ON GEAR POP WHEN TRYING TO EXTEND THE LNDG GEAR. AFTER SEVERAL TRIES HE DOES GET 3 GREEN AND ON LNDG, GEAR COLLAPSES. ACFT EQUIP PROB LNDG GEAR COLLAPSE.

Narrative: AFTER A THOROUGH PREFLT INSPECTION AT OR ABOUT XA00 LCL TIME, USING THE MANUFACTURER'S CHKLIST, I DEPARTED TO PRACTICE SOME TOUCH AND GOES. ON DOWNWIND, THE AIRSPD INDICATOR MALFUNCTIONED AND I DECIDED TO LAND AND HAVE THE INST CHKED OUT BY MECHS. UPON THE USUAL GUMP CHK, THE LNDG GEAR DID NOT WANT TO COME DOWN, POPPING THE CIRCUIT BREAKER (NO 3 GREEN LIGHTS). THE SAME HAPPENED ON BASE AND FINAL. I DID A GAR AND THE BREAKER POPPED OUT IN DOWNWIND AND BASE AGAIN. ON FINAL I GOT THE 3 GREEN LIGHTS AND I DECIDED TO LAND AT THE USUAL AND NORMAL APCH AND LNDG SPD USING VISUAL REF AND SOUND AS TRAINED TO DO AND AS I HAVE ALWAYS DONE IN THE PAST. BEING VFR I DEPEND MORE ON OUTSIDE REF THAN INSTS. I HAD A SIMILAR PROB FEW MONTHS AGO AND THE MANUFACTURER HAD TO SEND ME A NEW SET OF LIGHTS AND WERE INSTALLED ACCORDINGLY. WHEN I TOUCHED BEYOND THE NUMBERS, THE MAIN GEAR COLLAPSED FORCING ME TO SKID DOWN THE RWY. I CAME TO AN ABRUPT STOP. THEREAFTER, AND CALMLY, I TURNED OFF ALL SWITCHES, THE FUEL SELECTOR WAS TURNED OFF, UNFASTENED MY SEAT BELTS AND WALKED OUT.

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.

Small aircraft spi has circuit breaker on gear pop when trying to extend the landing gear. After several tries he does get 3 green and on landing, gear collapses. Aircraft equipment problem landing gear collapse.