2008 Nall Report - Aircraft Owners and Pilots Association

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2008 NALL REPORT Other Accident Factors Midair Collisions 10 total/4 fatal In 2007 GA aircraft were involved in ten midair collisions, four of which were fatal. The fatal accidents included a collision between two competitors rounding the first pylon in an air race at Reno and a collision between a vintage P-51 and an amateurbuilt P-51 replica during a formation landing at Oshkosh. The other two fatal accidents both involved instructional flights: A Cessna 172 practicing maneuvers in dual instruction collided with a departing V35B on a clear day, and a student pilot flying solo hit a light twin on an instrument flight plan. None of the remaining six caused serious injuries. Three of these occurred in the traffic pattern (one at a towered field), two during formation flight, and one in low-altitude cruise flight. Alcohol and Drugs 6 total/3 fatal Alcohol and drug misuse continues to rank low as an accident factor. Historically, these have been cited as a cause or factor in about 1.1 percent of all accidents. As a class, these accidents have a high probability of ending in a fatality. In 2007, four accident pilots were impaired by alcohol and two by drugs. All but one of the alcohol-related accidents was fatal. One of the fatals also caused serious injury to a student pilot whose CFI was killed. None of these accidents were attributed to illicit recreational drugs, but two were caused by prescription and/or over-the-counter medications. Pilot Incapacitation 6 total/4 fatal Pilot incapacitation is rare. Of the six incapacitation accidents that occurred in 2007, one was the result of a heart attack, and one a probable stroke. Both were fatal. Two, one fatal, were attributed to spatial disorientation. The remaining two were an apparent murder-suicide that killed two, and a loss of consciousness on short final that the pilot speculated might have been caused by dehydration. He suffered only minor injuries after a hard landing. Ground Injuries: Off-Airport 13 total (6 accidents)/5 minor injuries, 4 serious injuries, 4 fatalities The thought of airplanes falling out of the sky, causing death or injury on the ground, is a common worry for nonpilots. This concern is often cited as a reason to restrict or close GA airports, even though statistics show it is far more fiction than fact. In 2007 there were a total of six GA accidents that resulted in thirteen off-airport ground injuries. One person was killed when his house was hit by a light business jet attempting a go-around. Three people on the ground were killed and four more seriously injured in the crash of a light twin. Four other accidents caused a total of five minor injuries to off-airport individuals. Propeller Strike Injuries 3 total/0 fatal Propeller strike injuries usually result from either an attempt to hand-prop an airplane or inadvertent contact with a moving propeller by an individual in the ramp area. The number of fatalities from propeller strikes is very low, averaging two per year. Three propeller strike accidents occurred in 2007, one during hand-propping. The other two were people (one passenger and one aircraft mechanic) who walked into moving propellers. 28 29
31 (10.1%) 33 (11.4%) 30 (11.9%) 0 1998 1999 2000 2001 2002 OTHER 2003 2004 2005 ACCIDENT 2006 2007 FACTORS Amateur-Built Aircraft 226 total/55 fatal The amateur-built aircraft fleet includes a wide variety of designs and technologies, and covers the full range from simple, low-performance pleasure craft to high-tech, high-performance models. Most are single-engine. Pilots of amateur-built aircraft represent the full range of experience and certification. 226 amateur-built aircraft were involved in accidents, and 55 (24.3 percent) of these were fatal. All were single-engine and 205 (90.7 percent) had fixed gear (including 10 seaplanes or amphibians). A total of 102 (including three with retractable gear and one amphibian) had conventional landing gear (Figure 42). Amateur-Built Aircraft Involved in Accidents All Accidents Fatal Accidents Single-engine fixed 205 (90.7%) 47 (85.5%) Conventional gear 99 17 SE retractable 21 (9.3%) 8 (14.5%) Figure 42 Figure 43 tracks the proportion of accidents in amateur-built aircraft to overall GA accidents over the last ten years. Total amateur-built accidents continue to increase. The accident factor distribution is not markedly different from that in manufactured airplanes, with the exception of a somewhat higher proportion of maneuvering accidents (Figure 44). 250 200 150 100 50 0 Amateur-Built Aircraft Accident Trend 193 (11.5%) 197 (11.8%) 56 (16.3%) 57 (18.6%) 1998 Fuel management 7 6.81 Weather 6 Preflight and taxi 1999 205 (12.8%) 192 (12.8%) 52 (17.2%) 43 (14.1%) 2000 Mechanical failures 3 (5.5%) 8 Other 2001 207 (13.7%) 198 (13.4%) 60 (19.2%) 55 (17.6%) 2002 2003 4 (3.0%) 6.30 6.29 6.32 6.13 1 (1.8%) 6.03 187 (13.2%) 46 (15.8%) 2004 206 (14.3%) Homebuilt 60 (20.5%) 202 (15.4%) Homebuilt - fatal 2005 55 (20.3%) 2006 226 (16.1%) 55 (21.5%) 2007 5 Takeoff 25 (11.1%) and climb 11 (20.0%) Accident rate Cruise 1 (0.4%) Total amateur-built 1 (1.8%) 4 Fatal accident accidents rate 21 (9.3%) Maneuvering 16 (29.1%) Fatal amateur-built 3Descent/ 12 (5.3%) accidents approach 4 (7.3%) Go-around 2 5 (2.2%) 1 (1.8%) Landing 1.38 1.11 1.14 1.27 1.32 1.29 1.25 1.38 44 (19.5%) 1.24 0 1.18 1 2 (0.9%) Collisions 1998 19992 (3.6%) 2000 2001 2002 2003 2004 2005 2006 2007 Pilot 2 (0.9%) incapacitation 1 (1.8%) 0 10 20 30 40 50 6.11 6.78 Figure 43 Types of Accidents in Amateur-Built Aircraft 1 (1.8%) 2 (0.9%) 1 (1.8%) 13 (23.6%) 14 (6.2%) 6.06 6.47 47 (20.8%) 47 (20.8%) 300 250 200 276 (16.7%) 254 (15.4%) Figure 44 283 (18.0%) 251 (17.1%) 226 (15.1%) 219 (15.8%) 223 (15.0%) 204 (14.3%) 203 (14.5%) 202 (15.5%) 150 100 29 Mechanical accidents Fatal mechanical accidents
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Page 7 and 8: 0 1998 2 (22.2%) 2006 2007 ACCIDENT
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Page 17 and 18: ACCIDENT FACTORS: FLIGHT PLANNING A
Page 19 and 20: Accident Case Study DFW07FA049 Cess
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2008 Nall Report - Aircraft Owners and Pilots Association

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