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Small aircraft allowed to porpoise on landing, striking propeller.
| Attributes | |
| ACN | 157605 |
| Time | |
| Date | 199009 |
| Day | Sat |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : 1v5 |
| State Reference | CO |
| 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 Plan | VFR |
| Person 1 | |
| Affiliation | Other |
| Function | flight crew : single pilot |
| Qualification | pilot : private |
| Experience | flight time last 90 days : 20 flight time total : 200 flight time type : 20 |
| ASRS Report | 157605 |
| Events | |
| Anomaly | conflict : ground critical other anomaly other anomaly other |
| Independent Detector | other flight crewa |
| Resolutory Action | none taken : detected after the fact |
| Consequence | other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
On vacation flight from ut (bullfrog marina airport) to boulder municipal, normal approach to runway 8 at 80 KTS (as taught by instrument in houston), normal flare, dropped speed to approximately 55 KTS, lightly touched down on main wheels. Aircraft bounced approximately 20' in nose high attitude, settled back to runway on mains again, and bounced again about 20', nose high. Next contact with runway was nose wheel first and aircraft porpoised a few more times. Taxied off runway with vibration, shut down engine, discovered bent propeller. After looking at aircraft manual, approach speed recommended is 70 KTS. Aircraft was fairly light: 15 gals gas, 300 pounds of pilot and passenger, 40# luggage. I believe if I had used an approach speed of 65-70 KTS, the aircraft would have settled to runway at about 45 KTS. Well below stall speed.
Original NASA ASRS Text
Title: SMA ALLOWED TO PORPOISE ON LNDG, STRIKING PROPELLER.
Narrative: ON VACATION FLT FROM UT (BULLFROG MARINA ARPT) TO BOULDER MUNICIPAL, NORMAL APCH TO RWY 8 AT 80 KTS (AS TAUGHT BY INSTR IN HOUSTON), NORMAL FLARE, DROPPED SPD TO APPROX 55 KTS, LIGHTLY TOUCHED DOWN ON MAIN WHEELS. ACFT BOUNCED APPROX 20' IN NOSE HIGH ATTITUDE, SETTLED BACK TO RWY ON MAINS AGAIN, AND BOUNCED AGAIN ABOUT 20', NOSE HIGH. NEXT CONTACT WITH RWY WAS NOSE WHEEL FIRST AND ACFT PORPOISED A FEW MORE TIMES. TAXIED OFF RWY WITH VIBRATION, SHUT DOWN ENG, DISCOVERED BENT PROP. AFTER LOOKING AT ACFT MANUAL, APCH SPD RECOMMENDED IS 70 KTS. ACFT WAS FAIRLY LIGHT: 15 GALS GAS, 300 LBS OF PLT AND PAX, 40# LUGGAGE. I BELIEVE IF I HAD USED AN APCH SPD OF 65-70 KTS, THE ACFT WOULD HAVE SETTLED TO RWY AT ABOUT 45 KTS. WELL BELOW STALL SPD.
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.