Well apparently they were not fully depreciated as the notes to account state that clearly. And it is worth noting that
not market value.
On the fleet age Q is somewhat older than you realise. Partly it may be due to looking at the aircraft as Q likes to show them (which for example has one shown as entering the Q fleet in 2006 but it originally entered service in 1991).
This table is as of yesterday. The age has fallen due to several B767s being cut post 30.6.14 - even so look at the average for them.
[TD="width: 15%, align: center"]Number[/TD]
[TD="width: 15%"]Age[/TD]
[TD="width: 50%"]Rank for the age by aircraft type[/TD]
[TD="class: tdtexten, width: 20%"]Airbus A330[/TD]
[TD="class: tdtexten, width: 15%, align: center"]
22
[/TD]
[TD="class: tdtexten, width: 15%"]6.8 years[/TD]
[TD="class: tdtexten, width: 50%"]On 108 airlines operating this type of aircraft Qantas ranks 52[/TD]
[TD="class: tdtexten, width: 20%"]Airbus A380[/TD]
[TD="class: tdtexten, width: 15%, align: center"]
12
[/TD]
[TD="class: tdtexten, width: 15%"]4.8 years[/TD]
[TD="class: tdtexten, width: 50%"]On 12 airlines operating this type of aircraft Qantas ranks 9[/TD]
[TD="class: tdtexten, width: 20%"]Boeing 737 Next Gen[/TD]
[TD="class: tdtexten, width: 15%, align: center"]
62
[/TD]
[TD="class: tdtexten, width: 15%"]6.9 years[/TD]
[TD="class: tdtexten, width: 50%"]On 205 airlines operating this type of aircraft Qantas ranks 77[/TD]
[TD="class: tdtexten, width: 20%"]Boeing 747[/TD]
[TD="class: tdtexten, width: 15%, align: center"]
14
[/TD]
[TD="class: tdtexten, width: 15%"]16.2 years[/TD]
[TD="class: tdtexten, width: 50%"]On 90 airlines operating this type of aircraft Qantas ranks 28[/TD]
[TD="class: tdtexten, width: 20%"]Boeing 767[/TD]
[TD="class: tdtexten, width: 15%, align: center"]
14
[/TD]
[TD="class: tdtexten, width: 15%"]19.5 years[/TD]
[TD="class: tdtexten, width: 50%"]On 105 airlines operating this type of aircraft Qantas ranks 61[/TD]
[TD="class: tdtexten, width: 20%"]TOTAL[/TD]
[TD="class: tdtexten, width: 15%, align: center"]124[/TD]
[TD="class: tdtexten, width: 15%"]9.2 years[/TD]
[TD="class: tdtexten, width: 50%"]
The calculation of the fleet age can be approximated because it is only based on the supported aircraft
[/TD]
BTW Q purchased a number of 10yr old planes from BA.
The table below shows 4 of Q's B767s. The first column is the age sometimes given to the planes that have been acquired 2nd hand the 2nd column is the 'delivered' age (available for service) and the 3rd is date of first flight. Boeing has historically been able to minimise the time between first flight and service delivery (as low as 8 days for Q at times). Airbus' best is around 3 weeks. For the initial A380s the delay was up to 9 months.
[TD="class: xl24"]Age[/TD]
[TD="class: xl24, width: 90"]Delivered Age[/TD]
[TD="class: xl24, width: 86"]True Age[/TD]
[TD="class: xl25"]8.12[/TD]
[TD="class: xl25"]22.84[/TD]
[TD="class: xl25"]22.88[/TD]
[TD="class: xl25"]8.13[/TD]
[TD="class: xl25"]22.70[/TD]
[TD="class: xl25"]22.74[/TD]
[TD="class: xl25"]8.11[/TD]
[TD="class: xl25"]22.61[/TD]
[TD="class: xl25"]22.65[/TD]
[TD="class: xl25"]21.82[/TD]
[TD="class: xl25"]21.82[/TD]
[TD="class: xl25"]21.86[/TD]