A33O-203 A modern aerial transporter that keeps the attitude same to that of the RMS Titanic.
Keeping away Titanic and it's story from our discussion.I shall focus on A330 AND it's flight AF447's unexplainable crash.
I am working in aviation sector
specialized in engineering and partially dealing with the same model Aircraft.Like me almost all technical persons who are presently dealing with this Aircraft believes that the Machine is so flawless that it can't crashed unless anyone tries to crash it.AF447 was in no way diferrent from the one i am saying about,but it was fated to go into the unfathomable depth of mystery of it's crash alongwith 228 human lives of whom none were to found anywhere
On Sunday 31 May 2009, the Airbus A330-203 registered F-GZCP (in the picture)operated by Air France
was programmed to perform scheduled flight AF447 between Rio de Janeiro Galeão and
Paris Charles de Gaulle. Twelve crew members (3 flight crew, 9 cabin crew) and 216
passengers were on board. The departure was planned for 22 h 00.
Towards 22 h 10, the crew was cleared to start up engines and leave its parking position.
Takeoff took place at 22 h 29.
The takeoff weight was de 232.8t (for a MTOW of 233 t), including 70.4 tonnes of fuel.
The crew contacted, successively:
• RIO DE JANEIRO approach control,
• the CURITIBA ATC centre, which cleared it to climb to FL350 at 22 h 45 min 26 s,
• the BRASILIA ATC centre at 22 h 55 min 41 s,
• the RECIFE ATC centre at 23 h 19 min 27 s, the airplane being stable at FL350,
• the ATLANTICO ATC centre on HF at 1 h 33 min 25 s.
At 1 h 35 min 15 s, the crew informed the ATLANTICO controller that they had passed the
INTOL2 point then announced the following estimated times: SALPU at 1 h 48 min then
ORARO at 2 h 00. They also transmitted their SELCAL code and a test was performed.
At 1 h 35 min 46 s, the controller asked them to maintain FL350 and to give their estimated
time at the TASIL point.
Between 1 h 35 min 53 s and 1 h 36 min 14 s, the controller asked the crew three times for
its estimated time at the TASIL point. There was no further contact with the crew.A point why the investigators are suspecting the speed computation of aircraft and related pitot tube sensing the speed is that twenty-four automatic maintenance messages were received between 2 h 10 and 2 h15 via the ACARS system.ACARS refer to Aircraft Communications Addressing and Reporting system,which time to time keeps generating and transmitting messages to ground regarding faults in the aircraft.And the messages recieved showed inconsistency between the measured
speeds as well as the associated consequences.
Now,there are many system responsible for sensing the speed of an highly advanced aircraft specially A330 and the pitot tube(A330 has 3 numbers for fail safe) is the basic of all(found in all aircraft) and the base for sensing forward air pressure,it in turn activates a modern means,an air pressure transducer(converts mechanical air pressure to calculated electrical signal) which gives the data to ADIRU.ADIRU is Air Data Inertial Reference unit,this system processes this data systematically with other data and gives a final accurate result.Here,Airspeed read by pitot tube to the sum up of integration given by ADIRU was inconsistent might be due to intermittent clogging to pitot probes.
In this ocassion pilot should always fly the aicraft rather than the autopilot.Mystery arises when one fault mesage was recieved showing discontinuation of AUTOPILOT,thats too by unexplainable reason.And since there are series of system involved in order to give the final output airspeed accurately,it is almost next to impossible to determine the cause and failure when u are left with debris and noone to tell the story and all clues washed away by the atlantic
There won't be any end to our queries,me knowing the A330 & you not having the basic knowledge.All these experiences shows the human limitations time to time,but great is human nature whose determination is invincible.As the journey hasn't ended like it always go on,so it will.............