According to :
http://www.152hyderabad.co.uk/html/f...rs__d_f_c.html
September 22 letter ( relevant to September 17 )
"The unfortunate part about that engagement was that I lost ‘Old faithful’. It will go to a maintenance unit to be repaired and then because of its age will probably go to a training unit. Poor ‘Old Faithful’. I had become very attached to it."
Seems he last flew it on September 17.