During landing roll aircraft skidded to left and rolled off runway. Propeller damaged.

Attributes
ACN	120810
Time
Date	198908
Day	Mon
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : toa
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, High Wing, 1 Eng, Retractable Gear
Flight Phase	landing other
Flight Plan	None
Person 1
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : instrument pilot : commercial pilot : cfi
Experience	flight time last 90 days : 200 flight time total : 2040 flight time type : 60
ASRS Report	120810
Events
Anomaly	other anomaly
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:

Approach to 29R was normal with no problem. At landing the airplane bounced twice (not big bounce) and made a normal landing. It ran straight for awhile, but all of a sudden it started to skid to the left, and went into dirt area. Unfortunately the area was very soft, caused the propeller to hit soft soil. Surface wind at that time was about 270 at 14 slight crosswind from left. This may be one factor of the incident. However, I suspect that too much nose tire pressure caused overcontrol, resulting in lost control. Because later I found that nose tire had 70 pounds of pressure, while normal pressure is about 45 pounds. Before I left (took off), I noticed low tire pressure on nose gear. I asked for the service person to put more air, apparently he put too much air. I think it is also important to keep a specified air pressure to each tire.

Original NASA ASRS Text

Title: DURING LNDG ROLL ACFT SKIDDED TO LEFT AND ROLLED OFF RWY. PROPELLER DAMAGED.

Narrative: APCH TO 29R WAS NORMAL WITH NO PROBLEM. AT LNDG THE AIRPLANE BOUNCED TWICE (NOT BIG BOUNCE) AND MADE A NORMAL LNDG. IT RAN STRAIGHT FOR AWHILE, BUT ALL OF A SUDDEN IT STARTED TO SKID TO THE LEFT, AND WENT INTO DIRT AREA. UNFORTUNATELY THE AREA WAS VERY SOFT, CAUSED THE PROP TO HIT SOFT SOIL. SURFACE WIND AT THAT TIME WAS ABOUT 270 AT 14 SLIGHT XWIND FROM LEFT. THIS MAY BE ONE FACTOR OF THE INCIDENT. HOWEVER, I SUSPECT THAT TOO MUCH NOSE TIRE PRESSURE CAUSED OVERCONTROL, RESULTING IN LOST CONTROL. BECAUSE LATER I FOUND THAT NOSE TIRE HAD 70 LBS OF PRESSURE, WHILE NORMAL PRESSURE IS ABOUT 45 LBS. BEFORE I LEFT (TOOK OFF), I NOTICED LOW TIRE PRESSURE ON NOSE GEAR. I ASKED FOR THE SERVICE PERSON TO PUT MORE AIR, APPARENTLY HE PUT TOO MUCH AIR. I THINK IT IS ALSO IMPORTANT TO KEEP A SPECIFIED AIR PRESSURE TO EACH TIRE.

Data retrieved from NASA's ASRS site as of August 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.