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20 As the parameters recorded by the QAR were configurable by the airline, it is described as a
Digital ACMS Recorder (DAR) in Airbus terminology. To avoid confusion, the generic term QAR
is used in this report. ACMS is an abbreviation for Aircraft Condition Monitoring System.
21 CVR details: Part Number 2100-1020-02, Serial Number 000252164. FDR details: Part Number
2100-4043-02, Serial Number 000428627.
- 16 -
B2 and B3 provide more detailed data for the period covering the two in-flight
upsets. Figures B4 and B5 provide specific information for each of the upsets.
QAR download
Files stored on the QAR disk were recovered by the ATSB. Flight data from seven
flights was successfully recovered. The flights recorded were:
• 4 October 2008: Sydney – Adelaide, Adelaide – Singapore
• 5 October 2008: Singapore – Perth, Perth – Singapore
• 6 October 2008: Singapore – Perth, Perth – Singapore
• 7 October 2008: Singapore – Learmonth
For the accident flight, continuous data from engine start on the ground in
Singapore until after engine shutdown at Learmonth was successfully recovered.
Sequence of events
Table 3 provides a sequence of events prepared from data obtained from the
aircraft’s FDR. Times use UTC; local time was UTC plus 8 hours. Shaded areas
indicate events within the two in-flight upsets.
Table 3: Occurrence flight sequence of events
Time (UTC)
(hh:mm:ss)
Time relative
to event
(hh:mm:ss)
Event:
01:32:02 -03:10:23 Takeoff at Singapore
02:01:16 -02:41:09 Aircraft reached top of climb (37,000 ft or FL370)
04:40:28 -00:01:57 Autopilot 1 disconnect (involuntary)
04:40:28 -00:01:57
First master warning was recorded. Warnings
occurred during the remainder of the flight.
04:40:29 -00:01:56
First master caution was recorded. Cautions occurred
during the remainder of the flight.
04:40:31 -00:01:54
IR 1 Fail indication commenced (duration: remainder
of the flight)
04:40:34 -00:01:51
First angle-of-attack (AOA) spike for the captain’s (or
Left) AOA parameter – the spike value was +50.6
degrees. AOA spikes continued for the remainder of
the flight.
04:40:41 -00:01:44
First ADR 1 Fail indication (duration: less than 4
seconds)
04:40:50 -00:01:35 First stall warning (duration: less than one second)
04:40:54 -00:01:31
First overspeed warning (duration: less than one
second)
04:41:12 -00:01:13 Autopilot 2 engaged
04:41:14 -00:01:11
Aircraft reached 37,180 ft and began to descend to
37,000 ft
- 17 -
04:41:28 -00:00:57 Autopilot 2 disconnected
04:42:27 0:00:00 First pitch-down event commenced
04:42:28 0:00:01 Captain applied back pressure to the sidestick
04:42:28 0:00:01
A maximum nose-down elevator position of +10.3
degrees was recorded
04:42:29 0:00:01
A minimum vertical acceleration of -0.80 g was
recorded
04:42:29 0:00:04 A minimum pitch angle of -8.4 degrees was recorded
04:42:30 0:00:05 PRIM master changed from PRIM 1 to PRIM 2
04:42:31 0:00:05
A maximum vertical acceleration of +1.56 g was
recorded
04:42:31 0:00:06 PRIM 3 Fault (duration: 120 seconds)
04:43:45 0:01:20 Captain switched his IR source from IR 1 to IR 3
04:45:08 0:02:43 Second pitch-down event commenced
04:45:09 0:02:44 Captain applied back pressure to the sidestick
04:45:10 0:02:45 PRIM master changed from PRIM 2 to PRIM 1
04:45:11 0:02:46
A maximum nose-down elevator position of +5.4
degrees was recorded
04:45:11 0:02:46 PRIM 3 Fault (duration: remainder of the flight)
04:45:11 0:02:46
Flight controls’ ‘normal law’ changed to ‘alternate law’
(duration: remainder of the flight)
04:45:12 0:02:47
A minimum vertical acceleration of +0.20 g was
recorded
04:45:12 0:02:47 A minimum pitch angle of -3.5 degrees was recorded
04:45:13 0:02:48
A maximum vertical acceleration of +1.54 g was
recorded
04:47:25 0:05:00 Autothrust disengaged
04:49:05 0:06:40
A radio transmission commenced. Correlation with the
CVR showed that this was the PAN transmission.
04:54:24 0:11:59
A radio transmission commenced. Correlation with the
CVR showed that this was the Mayday transmission.
05:32:08 0:49:43 Aircraft touched down at Learmonth
05:42:12 1:02:47 Aircraft stopped at terminal
05:50:32 1:08:07 Power removed from FDR
FDR information related to ADIRUs
Recorded ADIRU parameters
Air data reference parameters that were recorded by the FDR included:
• pressure altitude
• computed airspeed
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