All three landing gears on a mooney M20B aircraft collapsed on landing.

Attributes
ACN	757600
Time
Date	200710
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : zzz.airport
State Reference	US
Altitude	agl single value : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	general aviation : personal
Make Model Name	M-20 B/C Ranger
Operating Under FAR Part	Part 91
Flight Phase	landing : roll
Flight Plan	None
Person 1
Affiliation	other
Function	flight crew : single pilot
Qualification	pilot : private pilot : instrument
Experience	flight time last 90 days : 18 flight time total : 1400 flight time type : 335
ASRS Report	757600
Events
Anomaly	aircraft equipment problem : critical ground encounters other
Independent Detector	other flight crewa
Resolutory Action	other
Consequence	other other
Supplementary
Problem Areas	Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance

Narrative:

No narrative provided. Callback conversation with reporter revealed the following information: reporter stated this is an older model mooney aircraft with a manual landing gear handle known as a johnson bar. There is only one green light for all three gear. When the gear are to be extended; the gear lever (johnson bar) which is at floor level; between the seats; is pulled up and locked into a retainer under the fwd instrument panel. At the same time; a button on the gear handle will pop-out indicating the handle is in the locked position. The green 'down and locked' light should also illuminate. Reporter also stated the green light did come on; but he failed to verify the handle was actually up and locked. So when he landed and the gear collapsed; the gear handle had slammed down between the seats. Reporter further states; this was not a mechanism failure. Even though the green light came on; he just didn't doublechk for the handle being secured in the 'up-lock' position retainer with the handle button popped-up. No damage to the main gear doors; some on the nose doors; but the belly antennas were ground down. The propeller will be replaced with a new scimitar type blade design.

Original NASA ASRS Text

Title: ALL THREE LANDING GEARS ON A MOONEY M20B ACFT COLLAPSED ON LANDING.

Narrative: NO NARRATIVE PROVIDED. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: REPORTER STATED THIS IS AN OLDER MODEL MOONEY ACFT WITH A MANUAL LANDING GEAR HANDLE KNOWN AS A JOHNSON BAR. THERE IS ONLY ONE GREEN LIGHT FOR ALL THREE GEAR. WHEN THE GEAR ARE TO BE EXTENDED; THE GEAR LEVER (JOHNSON BAR) WHICH IS AT FLOOR LEVEL; BETWEEN THE SEATS; IS PULLED UP AND LOCKED INTO A RETAINER UNDER THE FWD INSTRUMENT PANEL. AT THE SAME TIME; A BUTTON ON THE GEAR HANDLE WILL POP-OUT INDICATING THE HANDLE IS IN THE LOCKED POSITION. THE GREEN 'DOWN AND LOCKED' LIGHT SHOULD ALSO ILLUMINATE. REPORTER ALSO STATED THE GREEN LIGHT DID COME ON; BUT HE FAILED TO VERIFY THE HANDLE WAS ACTUALLY UP AND LOCKED. SO WHEN HE LANDED AND THE GEAR COLLAPSED; THE GEAR HANDLE HAD SLAMMED DOWN BETWEEN THE SEATS. REPORTER FURTHER STATES; THIS WAS NOT A MECHANISM FAILURE. EVEN THOUGH THE GREEN LIGHT CAME ON; HE JUST DIDN'T DOUBLECHK FOR THE HANDLE BEING SECURED IN THE 'UP-LOCK' POSITION RETAINER WITH THE HANDLE BUTTON POPPED-UP. NO DAMAGE TO THE MAIN GEAR DOORS; SOME ON THE NOSE DOORS; BUT THE BELLY ANTENNAS WERE GROUND DOWN. THE PROP WILL BE REPLACED WITH A NEW SCIMITAR TYPE BLADE DESIGN.

Data retrieved from NASA's ASRS site as of January 2009 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.