A PA24-180 cfii lands his aircraft with the gear not fully extended at mko, ok.

Attributes
ACN	555022
Time
Date	200207
Day	Fri
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : mko.airport
State Reference	OK
Altitude	agl single value : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	general aviation : personal
Make Model Name	PA-24 Turbo Comanche
Operating Under FAR Part	Part 91
Flight Phase	landing : roll
Flight Plan	None
Person 1
Affiliation	other
Function	flight crew : single pilot
Qualification	pilot : cfi pilot : multi engine pilot : instrument pilot : commercial
Experience	flight time last 90 days : 101 flight time total : 6891 flight time type : 2861
ASRS Report	555022
Events
Anomaly	aircraft equipment problem : critical conflict : ground critical ground encounters : gear up landing maintenance problem : improper maintenance other anomaly other
Independent Detector	other flight crewa
Resolutory Action	none taken : detected after the fact
Consequence	other other other
Supplementary
Problem Areas	Aircraft Flight Crew Human Performance Maintenance Human Performance
Primary Problem	Aircraft

Narrative:

The landing gear collapsed after touchdown and on the landing rollout, which resulted in a propeller strike and damage to 3 belly skins. The aircraft was a PA24-180 comanche with a previous history of a nose gear collapse while taxiing (8 yrs ago). The occurrence was reported to the oklahoma city FAA FSDO. Upon lifting the aircraft, the gear was partially extended. The gear had to be extended manually. The gear would not extend electrically or normally. Something appeared jammed. When the worm gear was disengaged from the motor and transmission, the gear fully extended and was locked into place. [It might be useful to] place mirrors on wingtips to ensure main gear is down.

Original NASA ASRS Text

Title: A PA24-180 CFII LANDS HIS ACFT WITH THE GEAR NOT FULLY EXTENDED AT MKO, OK.

Narrative: THE LNDG GEAR COLLAPSED AFTER TOUCHDOWN AND ON THE LNDG ROLLOUT, WHICH RESULTED IN A PROP STRIKE AND DAMAGE TO 3 BELLY SKINS. THE ACFT WAS A PA24-180 COMANCHE WITH A PREVIOUS HISTORY OF A NOSE GEAR COLLAPSE WHILE TAXIING (8 YRS AGO). THE OCCURRENCE WAS RPTED TO THE OKLAHOMA CITY FAA FSDO. UPON LIFTING THE ACFT, THE GEAR WAS PARTIALLY EXTENDED. THE GEAR HAD TO BE EXTENDED MANUALLY. THE GEAR WOULD NOT EXTEND ELECTRICALLY OR NORMALLY. SOMETHING APPEARED JAMMED. WHEN THE WORM GEAR WAS DISENGAGED FROM THE MOTOR AND XMISSION, THE GEAR FULLY EXTENDED AND WAS LOCKED INTO PLACE. [IT MIGHT BE USEFUL TO] PLACE MIRRORS ON WINGTIPS TO ENSURE MAIN GEAR IS DOWN.

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.