Small aircraft rolls off end of runway after landing downwind.

Attributes
ACN	222074
Time
Date	199209
Day	Fri
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : cec airport : 0o9
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, Fixed Gear
Flight Phase	landing other
Flight Plan	None
Person 1
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : private
Experience	flight time last 90 days : 30 flight time total : 300 flight time type : 175
ASRS Report	222024
Events
Anomaly	other anomaly other anomaly other
Independent Detector	other other : unspecified cockpit
Resolutory Action	none taken : unable
Consequence	other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Landing strip is in a canyon, 2500 ft long with 500 ft displaced threshold. Runways 6/24. Windsock at beginning of 24 was limp, failed to pick up windsock at end of 24. Air was very bumpy, so kept little extra power on during final to compensate. Landed at 90 KTS, 5-7 KTS faster than normal. Flare was longer than normal but not excessive. Rollout much longer than normal, plane ran off end of runway. After stopping saw that windsock at end of 24 showed a tailwind of approximately 10 KTS. To prevent recurrence: pick up both windsocks before deciding on runway and use runway that will have headwind during rollout.

Original NASA ASRS Text

Title: SMA ROLLS OFF END OF RWY AFTER LNDG DOWNWIND.

Narrative: LNDG STRIP IS IN A CANYON, 2500 FT LONG WITH 500 FT DISPLACED THRESHOLD. RWYS 6/24. WINDSOCK AT BEGINNING OF 24 WAS LIMP, FAILED TO PICK UP WINDSOCK AT END OF 24. AIR WAS VERY BUMPY, SO KEPT LITTLE EXTRA PWR ON DURING FINAL TO COMPENSATE. LANDED AT 90 KTS, 5-7 KTS FASTER THAN NORMAL. FLARE WAS LONGER THAN NORMAL BUT NOT EXCESSIVE. ROLLOUT MUCH LONGER THAN NORMAL, PLANE RAN OFF END OF RWY. AFTER STOPPING SAW THAT WINDSOCK AT END OF 24 SHOWED A TAILWIND OF APPROX 10 KTS. TO PREVENT RECURRENCE: PICK UP BOTH WINDSOCKS BEFORE DECIDING ON RWY AND USE RWY THAT WILL HAVE HEADWIND DURING ROLLOUT.

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.