Narrative:

I was making an approach into catalina airport, which is 1600 ft elevation and a cliff on each end of the runway (22/04). I entered downwind leg from 45 degrees at pattern altitude (approximately 2600 ft). I received altitude setting and winds (light and variable) from unicom, conditions clear 30 mi visibility. I began to descend approximately 30 degrees past numbers and added some flaps (1ST notch), then turned base, and again final. On final I added more flaps (2ND notch), till finally 3RD notch (maximum). I was slightly above GS based on plasi with white flashing light. Approach angle (vertical descent) and speed were all fine, and I was aligned with the runway centerline. As soon as I crossed over the cliff, just before the touchdown zone, over the threshold, the airplane dropped out from under me, as if we hit a windshear. The airplane hit hard and veered left and off the runway, between runway and taxiway (dirt strip), and the bottom of the right wing struck the plasi box, knocking the box off its mounts and separating the flap from the outboard hinge. I maneuvered the plane back to the runway and stopped, and taxied to the ramp. No other damage seemed to be apparent except that to the underside of the wing and the flap. However, further examination may be necessary. There were no injuries. Runway condition is poor (rough).

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Original NASA ASRS Text

Title: THE PLT MADE A HARD LNDG AT AVALON AND RAN OFF THE RWY HITTING THE PLASI BOX AND DAMAGING HIS FLAPS. THE PLT SAYS THE ACFT 'DROPPED OUT FROM UNDER' HIM. HE SAYS IT WAS LIKE HITTING A WINDSHEAR. HE SAID THE RWY CONDITION IS 'POOR, ROUGH.'

Narrative: I WAS MAKING AN APCH INTO CATALINA ARPT, WHICH IS 1600 FT ELEVATION AND A CLIFF ON EACH END OF THE RWY (22/04). I ENTERED DOWNWIND LEG FROM 45 DEGS AT PATTERN ALT (APPROX 2600 FT). I RECEIVED ALT SETTING AND WINDS (LIGHT AND VARIABLE) FROM UNICOM, CONDITIONS CLR 30 MI VISIBILITY. I BEGAN TO DSND APPROX 30 DEGS PAST NUMBERS AND ADDED SOME FLAPS (1ST NOTCH), THEN TURNED BASE, AND AGAIN FINAL. ON FINAL I ADDED MORE FLAPS (2ND NOTCH), TILL FINALLY 3RD NOTCH (MAX). I WAS SLIGHTLY ABOVE GS BASED ON PLASI WITH WHITE FLASHING LIGHT. APCH ANGLE (VERT DSCNT) AND SPD WERE ALL FINE, AND I WAS ALIGNED WITH THE RWY CTRLINE. AS SOON AS I CROSSED OVER THE CLIFF, JUST BEFORE THE TOUCHDOWN ZONE, OVER THE THRESHOLD, THE AIRPLANE DROPPED OUT FROM UNDER ME, AS IF WE HIT A WINDSHEAR. THE AIRPLANE HIT HARD AND VEERED L AND OFF THE RWY, BTWN RWY AND TXWY (DIRT STRIP), AND THE BOTTOM OF THE R WING STRUCK THE PLASI BOX, KNOCKING THE BOX OFF ITS MOUNTS AND SEPARATING THE FLAP FROM THE OUTBOARD HINGE. I MANEUVERED THE PLANE BACK TO THE RWY AND STOPPED, AND TAXIED TO THE RAMP. NO OTHER DAMAGE SEEMED TO BE APPARENT EXCEPT THAT TO THE UNDERSIDE OF THE WING AND THE FLAP. HOWEVER, FURTHER EXAMINATION MAY BE NECESSARY. THERE WERE NO INJURIES. RWY CONDITION IS POOR (ROUGH).

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.