Fly Me Friendly

As some of you may be aware, on October 7th 2008 a QANTAS A330 traveling from Singapore to Perth was about 154km west of Learmouth, West Australia when it entered a rapid descent, causing unsecured items & people to float up in the cabin, leading to injuries on board. The aircraft declared an emergency and diverted to Learmouth.

The ATSB has released a preliminary finding that states that a fault in one of the Air Data Inertial Reference Units (ADIRU #1) led to the incident. Investigations are continuing and QANTAS have instigated changes in their procedures should the symptoms appear again.

Well, guess what, the symptoms have appeared again! On Dec 27th, a QF A330 going from Perth to Singapore had a similar ADIRU problem in a similar part of the world (this time about 650 kilometers south of Learmouth). Fortunately the crew were able to enact the revised procedures and disconnect the systems, avoiding any upsets. They then decided to return to Perth.

The ATSB says it’s too early to draw conclusions but they note that it is the same problem and also that it occurred in a similar area to the previous incident. As such, they will include this incident in the investigations being performed for the Oct 7th incident which should produce a factual report about mid February.

One of the more interesting aspects of the Oct 7th incident is that the potential was raised for possible external influence on the ADIRU due to either portable electronic devices on board (laptops, mp3 players, etc) or from the Harold E Holt Naval Communications Station near Learmouth (there’s also a Wikipedia article on the comms station).

The situation gets even more interesting if you note that a Malaysian Airlines 777 had a similar ADIRU fault back in 2005 (PDF) in roughly the same area. Of course, the 777 has a different ADIRU, different software and the problem was traced to failed accelerometers and a software fault, but still – very interesting.

Hmmmm – I wonder if the military have been experimenting with something and accidentally zapping ADIRUs every now and again? (cue X-Files theme…).

I’ve just returned home from about 5 hours spent flying a 737-800 around Australia and NZ. It was, of course, a flight simulator – this time a fixed-base simulator that’s built around a collection of computers running MS Flight Simulator but with the “real thing” 737-800 cockpit with seats, controls, panels, the works. Three projectors drive the screens you watch from the inside and, aside from the lack of movement, it’s amazingly realistic.

Having been in a number of full motion sims, including the latest A330 sim that’s worth over $30 million, this one was extremely good and costs considerably less than that :)

The simulator belongs to Flight Experience here in Melbourne which is run by my friend Carlo. They’ve got the sim out at the QANTAS sim center near Essendon airport where it’s being tested and verified by the techs. Very soon now it will be relocating to its operational quarters somewhere in the CBD.

As a fixed base simulator it’s sufficient for procedures training and some level of official 737 training, thus it can be used by commercial pilots seeking their 737 endorsements to at least get a large part of the way there. This type of work represents about 5% of the market for Flight Experience as they’re targeting the general public, who can come in and see what it’s like to fly a jet airliner in and out of airports here in Australia. People can finally see what goes on behind that closed door up front, where they might get the odd tantalising glimpse of the “pointy end” :)

For tonight, Carlo and I were checking the unit out and having a lot of fun in the process, flying around Coolangatta & Brisbane, Christchurch, Melbourne and including some insane landings & take-off’s at Moorabbin. Fortunately, crashes were turned off, so we didn’t wind up splattered all over the virtual landscape as we probably should have (Moorabbin’s longest runways are somewhat smaller than those at Melbourne :)

All up it was great fun and I’d totally recommend having a session with Flight Experience when they’re up and running. I know I’ll be spending a few more hours in the unit when funds permit.