Safety in the vicinity of non-towered aerodromes - Australian ...

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Figure 10: Typical circuit entry methods at Australian non-towered aerodromes since 3 June 2010 Source: adapted from CASA, 2010a, CAA 1981 - 46 -
Circuit operations Making appropriate broadcasts in the circuit area is important so that all pilots can maintain awareness of other traffic. While the CAR 166 non-towered aerodrome procedures do not require pilots to make specific broadcasts when operating in the circuit, they are a positive and proactive way to help all pilots in the circuit at an aerodrome to maintain awareness of their position and the position of other aircraft in the circuit. Mid-air collision data from 1961 to 2003 (ATSB, 2004) found that almost 80 per cent (n = 29) of mid-air collisions occurred in or near the circuit area, with two-thirds of these involving aircraft on final approach or the base-to-final turn (Figure 11). That study also determined that 59 per cent of these collisions occurred outside the major GA aerodromes (those that were formerly General Aviation Aerodrome Procedures (GAAP)); however, only one collision had ever occurred in a Mandatory Broadcast Zone (MBZ) 27 where radio carriage was required (ATSB, 2004). Figure 11: Location of mid-air collisions in the circuit (constituting 29 of the 37 mid-air collisions in Australia between 1961 and 2003) Source: ATSB, 2004 27 MBZs were introduced in 1991, and were replaced in 2005 by CTAF(R) procedures following the NAS 2C implementation. CTAF(R) themselves were abolished from 3 June 2010, when radio carriage and use became mandatory at all registered, certified, military, and other specified nontowered aerodromes. While CTAF(R) did not have a specified airspace boundary like MBZs did, they had comparable radio carriage and broadcast requirements. - 47 -
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ATSB TRANSPORT SAFETY REPORT Aviati
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Published by: Australian Transport
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4.4 Making your presence and intent
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- vi -
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THE AUSTRALIAN TRANSPORT SAFETY BUR
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Airproxes and other separation issu
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across many aerodromes and aircraft
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Page 20 and 21: procedures from 3 June 2010) GPS Gl
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Page 24 and 25: What challenges do pilots face at n
Page 26 and 27: A factor in the frequency of occurr
Page 28 and 29: suggested that they ignored the lim
Page 30 and 31: airmanship principles, and to allow
Page 32 and 33: 1.3 Scope This report focused only
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Page 36 and 37: • Violations - any individual act
Page 38 and 39: Table 1: Movements for 20 selected
Page 40 and 41: that the level of detail and the ty
Page 42 and 43: Figure 1: Airspace-use and operatio
Page 44 and 45: Figure 2: Most common types of occu
Page 46 and 47: 3.4 Where were the most occurrences
Page 48 and 49: Occurrences relative to flight rule
Page 50 and 51: - 23 occurrences where the aircraft
Page 52 and 53: Runway incursions can have serious
Page 54 and 55: ATS errors in passing traffic infor
Page 56 and 57: In particular, pilots’ broadcasti
Page 58 and 59: Information errors were the most co
Page 60 and 61: A number of reports (n=40) indicate
Page 62 and 63: 5.3 Decision errors Decision errors
Page 64 and 65: A 2004 ATSB review of all 37 mid-ai
Page 66 and 67: In both cases, the pilots of most o
Page 70 and 71: At non-towered aerodromes, circuits
Page 72 and 73: 6.2 Why weren’t pilots monitoring
Page 74 and 75: 6.3 Other alerted ‘see-and-avoid
Page 76 and 77: Not a substitute for maintaining an
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Page 80 and 81: Figure 13: Damage to Piper PA-28 Wa
Page 82 and 83: 7.3 Avoiding action taken and colli
Page 84 and 85: One airprox occurred between two pa
Page 86 and 87: The movement data elements 32 colle
Page 88 and 89: Notable changes in traffic mix betw
Page 90 and 91: expected number of occurrences; how
Page 92 and 93: Investigation number AO-2007-006 Wi
Page 94 and 95: 8.4.4 Other recent investigations i
Page 96 and 97: 9.1.1 Parachuting operations A numb
Page 98 and 99: 9.1.4 Avoiding landing charges Ther
Page 100 and 101: See-and-avoid conflicts See-and-avo
Page 102 and 103: 10.2 Previous ATSB studies into non
Page 104 and 105: 10.4 What you need to do if you fly
Page 106 and 107: writing, data does not exist to eva
Page 108 and 109: Australian Transport Safety Bureau.
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