Small aircraft ground loop at mry.

Attributes
ACN	139697
Time
Date	199003
Day	Fri
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : mry
State Reference	CA
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	general aviation : personal
Make Model Name	Small Aircraft, Low Wing, 1 Eng, Retractable Gear
Flight Phase	landing other
Flight Plan	None
Person 1
Affiliation	Other
Function	instruction : instructor oversight : pic
Qualification	pilot : cfi pilot : instrument pilot : commercial
Experience	flight time last 90 days : 10 flight time total : 8050 flight time type : 7470
ASRS Report	139697
Person 2
Affiliation	Other
Function	instruction : trainee
Qualification	pilot : cfi pilot : commercial
Experience	flight time last 90 days : 60 flight time total : 1400 flight time type : 1000
ASRS Report	139637
Events
Anomaly	other anomaly other anomaly other
Independent Detector	other flight crewa
Resolutory Action	none taken : unable
Consequence	other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

On landing rollout aircraft veered to right on centerline and left gear collapsed. Callback conversation with reporter revealed the following: instrument pilot confirmed that the aircraft is not fitted with brakes on the instrument's right side. He also stated that he was unable to regain control of the aircraft. The aircraft was damaged. The instrument reporter stated that no mechanical cause for the problem could be found. The wind at the time of the incident was light and no factor. No aircraft was in proximity to the runway, thus loss of control due propeller or jet blast is not a consideration. The FAA has investigated the incident, but is not pursuing the matter further. Supplemental information from acn 139637: upon rollout aircraft veered away from centerline. Left brake inadequate to control. Left gear collapsed during ground loop. This occurred during pilot check in aircraft. No brakes for instrument pilot.

Original NASA ASRS Text

Title: SMA GND LOOP AT MRY.

Narrative: ON LNDG ROLLOUT ACFT VEERED TO RIGHT ON CENTERLINE AND LEFT GEAR COLLAPSED. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING: INSTR PLT CONFIRMED THAT THE ACFT IS NOT FITTED WITH BRAKES ON THE INSTR'S RIGHT SIDE. HE ALSO STATED THAT HE WAS UNABLE TO REGAIN CONTROL OF THE ACFT. THE ACFT WAS DAMAGED. THE INSTR RPTR STATED THAT NO MECHANICAL CAUSE FOR THE PROB COULD BE FOUND. THE WIND AT THE TIME OF THE INCIDENT WAS LIGHT AND NO FACTOR. NO ACFT WAS IN PROX TO THE RWY, THUS LOSS OF CONTROL DUE PROP OR JET BLAST IS NOT A CONSIDERATION. THE FAA HAS INVESTIGATED THE INCIDENT, BUT IS NOT PURSUING THE MATTER FURTHER. SUPPLEMENTAL INFO FROM ACN 139637: UPON ROLLOUT ACFT VEERED AWAY FROM CENTERLINE. LEFT BRAKE INADEQUATE TO CONTROL. LEFT GEAR COLLAPSED DURING GND LOOP. THIS OCCURRED DURING PLT CHK IN ACFT. NO BRAKES FOR INSTR PLT.

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.