Wednesday, September 7, 2016

Maule M-4-220C Strata Rocket, N40661: Accident occurred September 03, 2016 in Talkeetna, Alaska (and) Incident occurred November 01, 2012 in Bethel, Alaska

Aviation Accident Final Report - National Transportation Safety Board:

Docket And Docket Items -   National Transportation Safety Board:

Aviation Accident Data Summary -  National Transportation Safety Board:

NTSB Identification: GAA16CA468 
14 CFR Part 91: General Aviation
Accident occurred Saturday, September 03, 2016 in Talkeetna, AK
Probable Cause Approval Date: 01/18/2017
Aircraft: MAULE M4, registration: N40661
Injuries: 1 Uninjured.

NTSB investigators used data provided by various entities, including, but not limited to, the Federal Aviation Administration and/or the operator and did not travel in support of this investigation to prepare this aircraft accident report.

The pilot of a tailwheel equipped airplane reported that he was landing on a backcountry airstrip. He reported that after touchdown, about two-thirds of the way down the runway during the landing roll, the wind shifted to a tailwind. He further reported that the airplane over ran the runway, impacted a hill, and nosed over.

The airplane sustained substantial damage to the empennage. 

The pilot reported no preaccident mechanical malfunctions or failures with the airplane that would have precluded normal operation.

According to the pilot the wind was variable at 7-8 knots prior to the accident. 

The Federal Aviation Administration has published the Advisory Circular (AC) 91-79A. This AC discusses the hazards associated with runway overruns and the effect of a tailwind on landing distance and states in part:

The pilot must be aware of airspeed during the approach and of the targeted reference landing airspeed (VREF)/airspeed, plus wind gust adjustments, over the runway threshold. An excessive approach speed may result in an excessive speed over the runway's threshold, which may result in landing beyond the intended touchdown point as well as a higher speed from which the pilot must bring the airplane to a stop.

The effect of a tailwind on landing distance is significant and is a factor in determining the landing distance required. Given the airplane will land at a particular airspeed, independent of the wind, the principal effect of a tailwind on operational landing distance is the change in the ground speed at which the airplane touches down.

The National Transportation Safety Board determines the probable cause(s) of this accident as follows:

The pilot's failure to recognize and compensate for tailwind conditions during the landing roll, which resulted in a runway overrun and nose over.

November 01, 2012:  Aircraft force landed in the tundra - Bethel, Alaska 

FAA Flight Standards District Office: ANCHORAGE, AK (AL03)

  Regis#: 40661        Make/Model: M-4       Description: MAULE M-4
  Date: 11/01/2012     Time: 2330

  Event Type: Incident   Highest Injury: None     Mid Air: N    Missing: N
  Damage: None

  City: BETHEL   State: AK   Country: US


INJURY DATA      Total Fatal:   0
                 # Crew:   1     Fat:   0     Ser:   0     Min:   0        
                 # Pass:   3     Fat:   0     Ser:   0     Min:   0         
                 # Grnd:         Fat:   0     Ser:   0     Min:   0   
  Activity: Pleasure      Phase: Landing      Operation: OTHER

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