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19 September 2003 - Safeskies 2003 - Maintaining the Focus: The ATSB Perspective
Presentations and Speeches
19 September 2003
Safeskies 2003 - Maintaining the Focus: The ATSB Perspective
[slide 1] Note: Presentation slide
references.
Thank you, Mr Chairman and good morning ladies and
gentlemen.
As most of you know, the Australian Transport Safety Bureau was
established on the 1st of July 1999 and you will see in your
delegate's
information folders that the ATSB's mission
[slide 2] is to maintain and improve
transport safety and public confidence through independent 'no
blame' investigations
which seek to uncover the causal factors that led to an accident or
incident and encourage safety action to prevent accidents in
future. We do this in aviation, marine, and now interstate rail
[slide 3].
In addition to occurrence investigation, the ATSB is building
its aviation safety data analysis and research capacity which may
also lead to safety recommendations. In part, this is a response to
the Chicago Convention Annex 13 requirement [slide
4] from 1 November 2001 to analyse the information
contained in accident and incident reports and occurrence databases
to determine any preventative actions required. Our aim is that in
time, the ATSB's capacity in this area will be as well regarded as
our role in national road safety statistical analysis and research
[slide 5]. So far we have released
aviation safety analysis reports on bird strikes, and on fuel
exhaustion and starvation [slide 6] and
summaries are in your folders.
As the ATSB builds a business case to replace our current OASIS
aviation occurrence database, our aim will be to place more data on
the web and to better integrate with CASA, Airservices, Defence, NZ
and the broader Australian industry, while maintaining necessary
confidentiality. As required by the Government, the ATSB will also
review cost recovery arrangements throughout the bureau.
Without detracting from the important roles of others, I would
argue that the ATSB, like BASI in the past, makes a significant
contribution to aviation safety [slide
7]. In company with Canada's TSB, we are often most
satisfied when we can report positive safety action in our final
investigation reports instead of needing to make formal
recommendations. However, recommendations are still required and
the ATSB made 62 aviation safety recommendations last financial
year. They are listed on our website (www.atsb.gov.au) together
with all responses but let me give a few examples.
In relation to a Boeing 777-300 [slide
8] engine failure in November 2001 involving a Rolls
Royce Trent 800 engine, based on metallurgy failure analysis in the
ATSB laboratory [slide 9], the ATSB
recommended that Rolls Royce revise a service bulletin to highlight
necessary inspections for cracking failure between the lever and
connecting pin of the variable stator vane lever assemblies and
that the revision be reviewed by the UK CAA. These recommendations
were accepted and pleasingly the ATSB's February 2003 final report
was featured in a recent Flight Safety Foundation Bulletin.
Yesterday, as the result of investigation work on a recent
Robinson R22 loss of main rotor blade in flight fatal accident, the
ATSB released a recommendation to the FAA and Robinson Helicopters
to inspect a sample of main rotor blade root fittings to establish
the integrity of the adhesive bond in the spar to root fitting
joint. The R22 blade lost in flight showed evidence of adhesive
disbonding allowing moisture to initiate corrosion and fatigue
cracking in the region of the inboard bolt hole of the blade root
fitting. The ATSB is carefully reviewing the R22's operating
history including environmental conditions and is seeking similar
data from Robinson. The FAA, Robinson, and the NTSB are taking our
recommendation very seriously.
Following a runway incursion involving a Boeing 737 and a
sweeper vehicle at Perth Airport [slide
10], the ATSB recommended that Airservices Australia,
in conjunction with airport owners and CASA, review the adequacy of
equipment, standards and procedures for drivers of vehicles using
airport runways. Airservices has responded that among other
changes, vehicles that enter and remain on a duty runway will be
capable of monitoring and communicating on the tower control
frequency and will be controlled by air traffic controllers. Perth,
Adelaide and Melbourne control towers are expected to implement the
change this month with Canberra soon to follow.
As an example of a recent ATSB serious incident investigation
report, let me mention a microburst windshear incident involving
VH-TJX, another Boeing 737-400 [slide
11]. On approach into Brisbane at about 500 feet, the
weather deteriorated rapidly and the pilot in command initiated a
go-around. Shortly after, climb performance of 3600ft/min dropped
to 300ft/min due to the combined effects of microburst downdraft
and heavy rain. Maximum engine thrust was applied and the aircraft
successfully diverted to Maroochydore. In this case, the Bureau of
Meteorology public forecast of severe thunderstorms was not
provided to the flight crew or to Airservices Australia and air
traffic control tower concerns about the intensity of the
approaching thunderstorm were also not conveyed to the TJX crew
until the aircraft was on final approach. The serious incident
highlighted that in the absence of extensive Doppler weather radar
capabilities and wind shear detection systems, there is a need for
better collaborative decision-making among forecasters,
controllers, pilots and operators during periods of severe
convective weather.
An important example of a recently released report on an
accident investigation involved an approach and landing CFIT
accident with the death of an RFDS pilot in a Beech 200C at Mt
Gambier [slide 12]. The Bureau found that
in the dark night conditions at an unfamiliar aerodrome, for
reasons that could not be ascertained but possibly related to
self-imposed time pressure, the pilot did not comply with published
instrument approach procedures and impacted terrain 3.1 nautical
miles short of the runway close to the extended centreline. This
again highlights the importance of good CFIT/ALAR awareness. The
ATSB report noted the good work of the Aviation Safety Foundation
of Australia in conducting Flight Safety Foundation ALAR
courses.
Of the final aviation investigation reports released last
financial year, the one I am most proud of is our report into
Ansett 767 maintenance and continuing airworthiness of Class A
aircraft released on 15 November last year [slide
13]. I believe that the report is important on a
number of levels and I can only skim the surface here. You may know
that the ATSB's investigation was triggered by the groundings of
Ansett 767 aircraft in December 2000 and April 2001 primarily as a
result of missed fatigue crack inspections. While this action by
the operator and regulator assured passenger safety, our
investigation uncovered deeper systemic issues. (Locals will recall
that the possible consequence of unmanaged fatigue cracking was
well-demonstrated by the Vickers Viscount [slide
14] loss of right wing in flight accident in which
all 26 on board perished on a New Year's eve flight from Perth to
Port Hedland in 1968.)
The ATSBs Ansett investigation [slide
15] found that in addition to errors and omissions by
individuals associated with the operator, there were deeper system
and resource weaknesses in the airline group and shortcomings by
the FAA, both of which CASA was unaware. Ansett omitted to action
25,000 flight cycle inspections issued by Boeing in June 1997 and
updated in June 2000 to include fatigue crack inspections
[slide 16] of the aircraft tail
[slide 17]. It also failed to action
within the recommended six months a March 2000 Boeing Alert service
bulletin relating to possible cracking [slide
18] in 767 engine mount fittings [slide
19]. The FAA did not mandate Boeings June 1997
inspections for older 767s and subsequent service bulletins until
after the second Ansett groundings. Boeing did not highlight the
potential safety significance of the tail cracking issue in its
service bulletin until November 2001 prior to this the focus was on
it being a commercial issue.
Australias former CAA from 1990 to 1991 had reduced the
regulator's in-house capacity to review important manufacturer
service bulletins with safety consequences and relied on foreign
type regulators and operators to do so. CASA was unaware of delays
in the FAA and did not appreciate the extent of problems involving
Ansett's maintenance [slide 20].
Vulnerability was compounded by weaker than desirable feedback
systems for maintenance issues. The ATSB made a number of
recommendations to improve information flows in line with Annexes 8
and 6 of the ICAO framework.
Robust regulatory and operator systems for ageing aircraft built
on 'damage tolerance' principles are essential. This aspect is also
highlighted in a 2003 paper by Wilson and Locket. When major
changes occur to the commercial, organisational, IT and regulatory
environments, old ways of doing things need to be carefully
re-examined.
As Bruce Gemmell noted yesterday, a recent ATSB discussion paper
on Australia's aviation safety in the decade to December 2002
reports substantial improvement [slide
21]. For example, both the accident and fatal
accident rate per 100,000 hours flown (and per 100,000 departures)
have roughly halved, driven mainly by a reduction in general
aviation accidents. High capacity regular public transport has
experienced no fatalities since the 1960s and low capacity RPT
fatality rates remain low with no significant trend. However, a bad
year for GA fatal accidents and certainly one major RPT fatal
accident would change the picture as Bruce illustrated. There is no
room for complacency - only by 'maintaining the focus' on accident
prevention and safety culture can this improvement be sustained and
bettered. As our Ansett report emphasised, this requires
'organisational mindfulness' and sound communication and
cooperation within Australia and internationally including among
manufacturers, operators, ATC, regulators, and investigators.
The ATSB continues to exercise its response capability against
the possibility that there is a major RPT fatal accident in
Australia. An on-site scenario exercise called 'POPFLOT' will be
occurring in the near future. Where resources permit, we continue
to send investigators to assist with major accidents overseas to
gain experience [slide 22]. Most recently
we did this with the Ilyushin IL-76 TD fatal accident in East Timor
(where I acknowledge gratefully the support by DFS-ADF and DSTO),
the SQ006 747-400 accident in Taipei and the American Airlines
A300-600 accident in New York. The ATSB has been working with
Emergency Management Australia on a new umbrella Commonwealth/State
plan for a major aviation disaster called 'AVDISPLAN' which is
close to release. We continue to value our memberships of
international bodies such as the Flight Safety Foundation ITSA, and
ISASI.
Recent books by Adair, and by Cobb and Primo, provide a very
useful insight into likely media and political factors that could
follow a major fatal aviation accident. Adair's 2002 book traces
the NTSB's five year investigation of the 1994 USAir flight 427 737
crash near Pittsburgh [slide 23] and its
ultimate identification of a safety deficiency in the rudder power
control unit that could lead to a reversal under unusual
conditions. Along the way are all the usual problems with media
speculation and public conspiracy theories, blaming the airline and
the regulator, and the pilot's union blaming the aircraft while the
manufacturer blamed the pilots. In addition, we get internal
tensions within the NTSB including between investigators and the
Board. I commend it to you as a good read.
Cobb and Primo's 2003 book is more academic and appealed to me
as an escaped social scientist. They argue that major aviation
accidents in a country lead to media, political and policy
responses out of proportion to their statistical significance. They
say [slide 24]: Plane crashes capture our
attention because they bring to the fore a fact about flying that
is often unexpressed: once the cabin door closes, passengers are at
the mercy of the crew and the equipment. By nature, humans are
loath to relinquish control over their fate & As a consequence,
faith in the air travel system is contingent on the public learning
the reason a plane crashed & 'In such a culture the ultimate
horror is a disaster without an explanation, an essentially random
event'. Cobb and Primo examine five hypotheses that lead to
increased media coverage proxied as the dependent variable by New
York Times articles. The five are [slide
25]: increasing number of deaths; proximity to a
major metropolitan area; increasing level of causal uncertainty;
suspected terrorism or sabotage; and the involvement of 'political
entrepreneurs'. My guess is that these factors could be pretty
relevant in Australia.
Getting back to the practical side of investigation, I can
report that in 2002 the ATSB received tertiary accreditation for
five years for a new Diploma in Transport Safety Investigation
[slide 26]. This is an in-house
competency-based qualification linked to work level standards that
indicates that an appropriate standard has been reached by our
investigators in a range of areas. On-the-job mentoring and
coaching is a key part of the Diploma.
The ATSB is grateful that the Australian Government sponsored
new multi-modal safety investigation legislation [slide
27] for aviation, marine and rail which received
bipartisan support in the Parliament. The Transport Safety
Investigation Act 2003 and accompanying Transport Safety
(Consequential Amendments) Act 2003 and Transport Safety
Investigation Regulations 2003 came into effect on 1 July. The new
TSI Act reinforces the fact that the ATSB conducts no-blame
aviation safety investigations in accordance with the provisions of
Articles 26 and 37 and Annex 13 to the Chicago Convention. The
Government's wish for the ATSB to cooperate with other legitimate
investigation bodies is made explicit but where necessary the TSI
Act provides the ATSB with primacy in investigation unless there is
a clear case of 'unlawful interference', such as in a case of
terrorism. The TSI Act [slide 28] also
reinforces the ATSB's operational independence subject only to a
Ministerial power to require the Bureau to initiate an
investigation. The Act includes a new power to apply an evidence
protection order and stiff penalties for breaching such an order or
hindering an investigation. It also bolsters the protection given
to sensitive ATSB investigation material and reports, including
against use in criminal or civil proceedings other than coronial
inquiries. This is to encourage a free flow of safety information
to the ATSB in the interests of future safety. Other bodies that
determine blame or liability such as CASA or the police operate in
parallel and, unlike the ATSB, cannot compel witnesses to give
evidence that may self-incriminate.
The ATSB strongly supports ICAO's GASP [slide
29] and will be involved in the ICAO audit process
that for the first time in 2004 includes Annex 13. Australia
responded to an initial ICAO questionnaire on 31 August 2003. While
we will always investigate international accidents occurring in
Australian territory as required by Article 26, and we also seek to
attend all non-sport fatal aviation accidents where practicable,
Australia has notified differences against investigating all
domestic accidents in the intensive manner suggested by Annex 13.
We believe that this is often not the best use of scarce safety
resources which may be better directed towards investigation of
serious incidents or to research and analysis of safety trends.
In Australia's federal system, primary responsibility for
determining cause of death lies with state and territory coroners
who also typically oversight forensic and pathology services.
Coroners have an important and difficult job and face pressure to
assist loved-ones of the deceased with closure and to resist
attempts by counsel to make a name for themselves in local media or
to position their clients for future litigation. The ATSB
[slide 30] has sought increased
understanding and cooperation with coroners and supported their
privileged access to investigation information under the TSI Act.
Professional relationships with most coroners are good and there is
an awareness that the ATSB investigates with the Annex 13 primary
goal of future safety, not to expend scarce funds to assess every
possibility that may be of interest in coronial or subsequent legal
proceedings. In complex investigations with limited evidence, it is
always possible to say with the benefit of hindsight that the ATSB
could have done better, particularly with greater resource
expenditure. However, two recent inquests have, in my opinion, been
excessively harsh in their criticism.
The Western Australian State Coroner's findings last September
in relation to VH-SKC, the chartered Beech King Air so-called
'ghost flight' which ultimately crashed near Burketown
[slide 31], followed most of the ATSB
report (that suggested likely hypobaric hypoxia from unknown causes
incapacitating the pilot and passengers) and adopted our suggested
safety recommendations, but criticised the Bureau for its Annex 13
processes including confidentiality of investigation information
such as witness statements and internal investigator analysis. The
Coroner concluded that the ATSB had initial control over all
relevant exhibits whereas the bodies of the deceased had been
removed by state police and pathologists before the ATSB arrived at
the accident site. In addition to his safety recommendations, the
ATSB welcomed the Coroner's findings that it ultimately appears
that the ATSB report was based on a substantial amount of
scientific investigation and in relation to pathology testing that
the various Coronial jurisdictions clearly have a role to play in
this context to ensure that sensible cooperation can take place.
But of course, this was not the media's emphasis.
The South Australian State Coroner's findings on 24 July in
relation to the VH-MZK Whyalla Airlines Piper Chieftain crash into
Spencer Gulf [slide 32] were rather
colourful in their criticism of the ATSB's investigation. As many
of you know, after the ATSB completed its report in December 2001
the aircraft engine manufacturer began to issue service bulletins
pointing to a possible manufacturing problem with the steel in
Chieftain crankshafts and VH-MZK's left crankshaft was ultimately
included in a September 2002 bulletin. Despite the circumstantial
appeal of this development, when we eventually got the crankshaft
back from US civil litigation proceedings and destructively tested
it, we confirmed our original finding that the crack in the
crankshaft was initiated about 50 flights before the crash as a
result of the edge of a bearing rubbing on the surface and
initiating a thermal crack just below the nitrided case. We found
no evidence of a manufacturing defect in the steel that under
normal operating conditions could have initiated the crack. An ATSB
supplementary report addressing significant evidence since our 2001
report should be available this November.
Despite our bruising in these recent inquests, I remain hopeful
that all coroners will work more cooperatively with the ATSB and
vice versa under the new TSI Act umbrella. To this end, we are
expecting consolidated coronial comments back next month on a
proposed memorandum of understanding or declaration of intent.
The ATSB works in a highly charged environment where accidents
can have major consequences for the families of deceased, for
reputations and financially. While in systemic investigations we
are sometimes critical of operators, regulators and service
providers and not just the human at the sharp end, we seek to do so
in a manner that promotes learning and future safety
[slide 33]. We recognise that in a 'just
culture'the relatively few deliberate acts that undermine safety
should not go unpunished, but that is not the ATSBs role. While
there will always be critics, the ATSB has been supportive of
CASA's move towards system-based audits and increasing recognition
of the human factor. The Government has legislation in process to
create a new confidential aviation self-reporting scheme (ASRS) to
be administered by the ATSB in place of the CAIR scheme that has
served us well since 1988. Similar to the US ASRS, the proposed
Australian ASRS scheme will enable those reporting a safety breach
to the ATSB under a threshold of seriousness, to claim indemnity
from regulatory action by CASA once every five years.
Let me conclude by saying that if in two years time our esteemed
Executive Chairman Peter Lloyd, and Bob Warn, Rob Lee and all the
others who volunteer time to make Safeskies happen go 'once more
into the breach', and then invite me back, there are a couple of
things on which I hope to report. First, and most importantly, I
hope to be able to say that we have successfully waged war on
'normalised deviancy'and the downward trend in aviation accident
and fatality rates has continued and there have been no new RPT
fatals. Second, I hope to be able to report that safety culture,
cooperation and relationships in the sometimes personality-charged
aviation industry have improved and that we are all working
together toward our common goal of aviation safety.
On behalf of the ATSB [slide 34],
thank you for the opportunity to speak with you this morning.
References
- Adair, Bill (2002) The Mystery of Flight 427: Inside a Crash
Investigation, Washington: Smithsonian Institution Press.
- ATSB (2001a) Pilot and Passenger Incapacitation, Beech Super
King Air 200 VH-SKC, Wernadinga Station, Qld, Aviation Safety
Report BO/200003771, Canberra: Australian Transport Safety Bureau,
March.
- ATSB (2001b) Piper PA31-350 Chieftain VH-MZK Spencer Gulf SA,
(Whyalla Airlines), Aviation Safety Report 200002157, Canberra:
Australian Transport Safety Bureau, December.
- ATSB (2002a) Boeing 737-400, VH-TJX, Brisbane, Qld, Air Safety
Investigation 200100213, Canberra: Australian Transport Safety
Bureau, August.
- ATSB (2002b) Sweeper on the Runway at Perth International
Airport, Air Safety Investigation 200102695, Canberra: Australian
Transport Safety Bureau, September.
- ATSB (2002c) Cessna Aircraft Company Conquest, Air Safety
Investigation Occurrence Brief 200200095, Canberra: Australian
Transport Safety Bureau, October.
- ATSB (2002d) Investigation into Ansett Australia maintenance
safety deficiencies and the control of continuing airworthiness of
Class A aircraft, Aviation Safety Investigation BS/20010005,
Canberra: Australian Transport Safety Bureau, November.
- ATSB (2003a) Boeing Co B777 Air Safety Occurrence Report
200105494, Canberra: Australian Transport Safety Bureau,
February.
- ATSB (2003b) Raytheon Beech 200C, VH-FMN, (Mt Gambier SA) Air
Safety Occurrence Report BO/2001105769, Canberra: Australian
Transport Safety Bureau, February.
- ATSB (2003c) Aviation Safety Indicators 2002: A report on
safety indicators relating to Australian aviation, discussion
paper, Canberra: Australian Transport Safety Bureau, August.
- ATSB (2003d) Annual Review 2003, Canberra: Australian Transport
Safety Bureau, (forthcoming October).
- Barnett, A. & Higgins, M.K. (1989) Airline Safety: The Last
Decade, Management Science, Vol.35, No.1, January.
- Chicago Convention (1944), Convention on International Civil
Aviation, ICAO (as amended).
- Cobb, R.W. & Primo, D.M. (2003) The Plane Truth: Airline
Crashes, the Media, and Transportation Policy, Washington DC,
Brookings Institution Press.
- Gregoriades, A., Sutcliffe, A. & Shin J-E. (2003) Assessing
the Reliability of Socio-Technical Systems, Systems Engineering,
Vol.6, No.3.
- ICAO (2001) Annex 13 to the Chicago Convention, 9th edition,
ICAO, July.
- TSI Act (2003) Transport Safety Investigation Act 2003;
Transport Safety (Consequential Amendments) Act 2003; Transport
Safety Investigation Regulations 2003, Commonwealth of Australia:
Commonwealth Government Printer, all available on the ATSB website:
www.atsb.gov.au.
- Wilson, E.S. & Locket, R.D. (2003) Managing Ageing Aircraft
Structures, paper presented at the 10th Australian International
Aerospace Congress, Brisbane, 29 July-1 August.
Spoken by: Mr Kym Bills (ATSB Executive Director)
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