ASN Wikibase Occurrence # 146686
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| Date: | Monday 9 July 2012 |
| Time: | 09:37 |
| Type: |  Mooney M20L PFM |
| Owner/operator: | Private |
| Registration: | N137MP |
| MSN: | 26-0017 |
| Engine model: | Continental IO-550 |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Scottsdale Airport - KSDL, Scottsdale, Arizona -
 United States of America
|
| Phase: | Landing |
| Nature: | Training |
| Departure airport: | Scottsdale, AZ (SDL) |
| Scottsdale, AZ (SDL) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The flight instructor stated that the pilot receiving instruction was practicing touch-and-go landings. On the fifth landing, the pilot flared too high, and the airplane dropped to the runway, landed hard, and bounced into the air. The flight instructor directed the pilot to “go around,” and the pilot applied power and fully retracted the flaps, which is contrary to the procedure in the pilot’s operating handbook to retract the flaps only to the 10-degree position. Both pilots stated that the engine did not respond. A video recording showed that the airplane’s altitude was about 30 feet above the ground when it rolled left to a bank angle of about 90 degrees. The left wing tip impacted the runway, and the airplane cartwheeled and came to rest upright about 200 feet left of the runway centerline.
Postaccident examination of the engine revealed that two O-ring seals were installed on each of the engine’s six fuel injector nozzles, whereas the engine’s maintenance manual called for the installation of only one O-ring seal on each nozzle. However, flow testing showed that placing two O-rings on the nozzles had no effect on the operation of the fuel system. No other anomalies were found, and the examination and testing indicated that the engine was capable of operating normally and producing its rated horsepower. Further, the damage to the propeller blades was consistent with the engine operating at a mid-range to high power setting at impact. The airplane’s left roll to a steep bank angle is consistent with the engine developing power as the airplane enters an aerodynamic stall, which resulted in a torque roll to the left.
Probable Cause: The pilot's failure to maintain airplane control during an aborted landing, and the flight instructor’s delayed remedial action. Contributing to the accident were the pilot’s improper landing flare, which resulted in a bounced landing, and his premature flap retraction while performing a go-around maneuver.
Accident investigation:
 |
|
Sources:
NTSB
https://flightaware.com/live/flight/N137MP
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 10-Jul-2012 22:18 | Geno | Added |
| 11-Oct-2012 23:53 | Anon. | Updated [Source, Narrative] |
| 21-Dec-2016 19:28 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
| 19-Aug-2017 16:03 | ASN Update Bot | Updated [Operator, Other fatalities, Departure airport, Destination airport, Source, Narrative] |
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