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The accident rate for helicopters carrying revenue
passengers and freight (based on a 12-month moving
average) also decreased (Figure 3, page 39).
The rate was below the CAA 2005 target of 4.0
accidents per 100,000 fl ight hours.
For the three-year period April 1, 2002, through
March 31, 2005, incident rates (based on a 12-
month moving average) involving airplanes
carrying revenue passengers and freight 13,608
kilograms and greater and those between 5,670
kilograms and 13,608 kilograms are shown in
Figure 4 (page 39).3 Equivalent data for helicopters
are shown in Figure 5 (page 40).
In successive-year six-month periods (Jan. 1, 2003,
to June 30, 2003, compared with Jan. 1, 2004, to June
30, 2004), the number of incidents in both airplane
categories rose, while the number of helicopter incidents
fell slightly (Table 1, page 40).
Incidents in the 2003 and 2004 six-month periods
were classifi ed according to severity. There were
no critical incidents4 in either airplane category in
either six-month period. Major incidents5 decreased
between the 2003 six-month period and the 2004
six-month period in both airplane categories. Minor
incidents6 increased between the six-month periods
AVIATION STATISTICS
New Zealand Accident Rates for
Larger Airplanes, Helicopters Better
Than Regulatory-agency Targets
Airplanes carrying revenue passengers and freight showed decreasing long-term accident
rates. The improvement was most pronounced in airplanes with maximum takeoff weights
between 5,670 kilograms (12,500 pounds) and 13,608 kilograms (30,000 pounds). In year-to-year
comparisons of corresponding six-month periods, the number of incidents involving airplanes
carrying revenue passengers and freight increased.
— FSF EDITORIAL STAFF
3 8 FLIGHT SAFETY FOUNDATION • FLIGHT SAFETY DIGEST • JUNE 2005
S T A T I S T I C S
Figure 1
Accident Rate (10-year Moving Average), Airplanes 5,670 Kilograms to 13,608 Kilograms
(5,670 Pounds to 30,000 Pounds), New Zealand, July 1, 2000–March 31, 2005
Note:
Data are for airplanes carrying revenue passengers and freight.
Zeros in the two most recent quarters indicate that there were no accidents in this category in those quarters.
Target is set by the Civil Aviation Authority of New Zealand for 2005.
Source: Civil Aviation Authority of New Zealand
0 0
Target
0.5
0.0
0.1
0.2
0.3
0.4
0.5
0.6
2000/Q3 2001/Q1 2001/Q3 2002/Q1 2002/Q3 2003/Q1 2003/Q3 2004/Q1 2004/Q3 2005/Q1
Quarter
Accidents per 100,000
Flight Hours
Trend
Figure 2
Accident Rate (10-year Moving Average), Airplanes 13,608 Kilograms (30,000 Pounds)
And Greater, New Zealand, July 1, 2000–March 31, 2005
Note:
Data are for airplanes carrying revenue passengers and freight.
Zeros in the two most recent quarters indicate that there were no accidents in this category in those quarters.
Target is set by the Civil Aviation Authority of New Zealand for 2005.
Source: Civil Aviation Authority of New Zealand
2000/Q3 2001/Q1 2001/Q3 2002/Q1 2002/Q3 2003/Q1 2003/Q3 2004/Q1 2004/Q3 2005/Q1
Quarter
0 0
Target
0.4
0.0
0.1
0.2
0.3
0.4
0.5
Accidents per 100,000
Flight Hours
Trend
in both airplane categories. (CAA did not break out
data for helicopter-incident severity from a category
that also included incidents involving airplanes less
than 5,670 kilograms and sport aircraft.)
Incidents in the successive-year six-month
periods were classified by type. The two most
common types were airspace incidents7 and
defect incidents.8
For airplanes 13,608 kilograms and greater, the
number of airspace incidents increased between
the 2003 six-month period and the 2004 six-month
period (Table 2, page 41). Airplanes between 5,670
FLIGHT SAFETY FOUNDATION • FLIGHT SAFETY DIGEST • JUNE 2005 39
S T A T I S T I C S
Figure 3
Accident Rate (12-month Moving Average), Helicopters,
New Zealand, July 1, 2000–March 31, 2005
Note:
Data are for helicopters carrying revenue passengers and freight.
Numbers in the two most recent quarters indicate the numbers of accidents in this category in those quarters.
Target is set by the Civil Aviation Authority of New Zealand for 2005.
Source: Civil Aviation Authority of New Zealand
0
1
Target
4.0
0
5
10
15
20
Accidents per 100,000
Flight Hours
Trend
2000/Q3 2001/Q1 2001/Q3 2002/Q1 2002/Q3 2003/Q1 2003/Q3 2004/Q1 2004/Q3 2005/Q1
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