Please read the following table in HTML format from a webpage and then answer the question in detail according to the table. Each table cell is defined by a <td> and a </td> tag. Each table row starts with a <tr> and ends with a </tr> tag. 'rowspan=m' and 'colspan=n' represents a cell spaning over 'm' rows and 'n' columns.

Webpage title:
Chief of Air Force (Australia)
Table title:
Appointees
Table:
<table id='hittask' contenteditable='False'>
<tr> <th colspan=1 rowspan=1 > Rank & Pre-Nominal </th><th colspan=1 rowspan=1 > Name </th><th colspan=1 rowspan=1 > Post- Nominals </th><th colspan=1 rowspan=1 > Service </th><th colspan=1 rowspan=1 > Term began </th><th colspan=1 rowspan=1 > Term ended </th><th colspan=1 rowspan=1 > Time in appointment </th></tr>
<tr> <td class="highlighted"  colspan=6 rowspan=1 > Chief of the Air Staff </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > Wing Commander </td><td colspan=1 rowspan=1 > Richard Williams </td><td colspan=1 rowspan=1 > DSO, OBE </td><td colspan=1 rowspan=1 > RAAF </td><td colspan=1 rowspan=1 > October 1922 </td><td colspan=1 rowspan=1 > December 1922 </td><td colspan=1 rowspan=1 > 61 days </td></tr>
<tr> <td colspan=1 rowspan=1 > Wing Commander </td><td colspan=1 rowspan=1 > Stanley Goble </td><td colspan=1 rowspan=1 > CBE, DSO, DSC </td><td colspan=1 rowspan=1 > RAAF </td><td colspan=1 rowspan=1 > December 1922 </td><td colspan=1 rowspan=1 > February 1925 </td><td colspan=1 rowspan=1 > 2 years, 62 days </td></tr>
<tr> <td colspan=1 rowspan=1 > Air Commodore </td><td colspan=1 rowspan=1 > Richard Williams </td><td colspan=1 rowspan=1 > CBE, DSO </td><td colspan=1 rowspan=1 > RAAF </td><td colspan=1 rowspan=1 > February 1925 </td><td colspan=1 rowspan=1 > December 1932 </td><td colspan=1 rowspan=1 > 7 years, 304 days </td></tr>
<tr> <td colspan=1 rowspan=1 > Air Commodore </td><td colspan=1 rowspan=1 > Stanley Goble </td><td colspan=1 rowspan=1 > CBE, DSO, DSC </td><td colspan=1 rowspan=1 > RAAF </td><td colspan=1 rowspan=1 > December 1932 </td><td colspan=1 rowspan=1 > June 1934 </td><td colspan=1 rowspan=1 > 1 year, 182 days </td></tr>
<tr> <td colspan=1 rowspan=1 > Air Vice Marshal </td><td colspan=1 rowspan=1 > Richard Williams </td><td colspan=1 rowspan=1 > CB, CBE, DSO </td><td colspan=1 rowspan=1 > RAAF </td><td colspan=1 rowspan=1 > June 1934 </td><td colspan=1 rowspan=1 > February 1939 </td><td colspan=1 rowspan=1 > 5 years, 0 days </td></tr>
<tr> <td colspan=1 rowspan=1 > Air Vice Marshal </td><td colspan=1 rowspan=1 > Stanley Goble </td><td colspan=1 rowspan=1 > CBE, DSO, DSC </td><td colspan=1 rowspan=1 > RAAF </td><td colspan=1 rowspan=1 > February 1939 </td><td colspan=1 rowspan=1 > January 1940 </td><td colspan=1 rowspan=1 > 334 days </td></tr>
<tr> <td colspan=1 rowspan=1 > Air Commodore </td><td colspan=1 rowspan=1 > William Anderson </td><td colspan=1 rowspan=1 > CBE, DFC </td><td colspan=1 rowspan=1 > RAAF </td><td colspan=1 rowspan=1 > January 1940 </td><td colspan=1 rowspan=1 > February 1940 </td><td colspan=1 rowspan=1 > 31 days </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > Air Chief Marshal Sir </td><td class="highlighted"  colspan=1 rowspan=1 > Charles Burnett </td><td colspan=1 rowspan=1 > KCB, CBE, DSO </td><td class="highlighted"  colspan=1 rowspan=1 > RAF </td><td class="highlighted"  colspan=1 rowspan=1 > February 1940 </td><td colspan=1 rowspan=1 > May 1942 </td><td colspan=1 rowspan=1 > 2 years, 89 days </td></tr>
<tr> <td colspan=1 rowspan=1 > Air Marshal </td><td colspan=1 rowspan=1 > George Jones </td><td colspan=1 rowspan=1 > CB, CBE, DFC </td><td colspan=1 rowspan=1 > RAAF </td><td colspan=1 rowspan=1 > May 1942 </td><td colspan=1 rowspan=1 > January 1952 </td><td colspan=1 rowspan=1 > 9 years, 245 days </td></tr>
<tr> <td colspan=1 rowspan=1 > Air Marshal Sir </td><td colspan=1 rowspan=1 > Donald Hardman </td><td colspan=1 rowspan=1 > KCB, OBE, DFC </td><td colspan=1 rowspan=1 > RAF </td><td colspan=1 rowspan=1 > January 1952 </td><td colspan=1 rowspan=1 > January 1954 </td><td colspan=1 rowspan=1 > 2 years, 0 days </td></tr>
<tr> <td colspan=1 rowspan=1 > Air Marshal Sir </td><td colspan=1 rowspan=1 > John McCauley </td><td colspan=1 rowspan=1 > KBE, CB </td><td colspan=1 rowspan=1 > RAAF </td><td colspan=1 rowspan=1 > January 1954 </td><td colspan=1 rowspan=1 > March 1957 </td><td colspan=1 rowspan=1 > 3 years, 59 days </td></tr>
<tr> <td colspan=1 rowspan=1 > Air Marshal Sir </td><td colspan=1 rowspan=1 > Frederick Scherger </td><td colspan=1 rowspan=1 > KBE, CB, DSO, AFC </td><td colspan=1 rowspan=1 > RAAF </td><td colspan=1 rowspan=1 > March 1957 </td><td colspan=1 rowspan=1 > May 1961 </td><td colspan=1 rowspan=1 > 4 years, 61 days </td></tr>
<tr> <td colspan=1 rowspan=1 > Air Marshal Sir </td><td colspan=1 rowspan=1 > Valston Hancock </td><td colspan=1 rowspan=1 > KBE, CB, DFC </td><td colspan=1 rowspan=1 > RAAF </td><td colspan=1 rowspan=1 > May 1961 </td><td colspan=1 rowspan=1 > May 1965 </td><td colspan=1 rowspan=1 > 4 years, 0 days </td></tr>
<tr> <td colspan=1 rowspan=1 > Air Marshal Sir </td><td colspan=1 rowspan=1 > Alister Murdoch </td><td colspan=1 rowspan=1 > KBE, CB </td><td colspan=1 rowspan=1 > RAAF </td><td colspan=1 rowspan=1 > June 1965 </td><td colspan=1 rowspan=1 > December 1969 </td><td colspan=1 rowspan=1 > 4 years, 183 days </td></tr>
<tr> <td colspan=1 rowspan=1 > Air Marshal Sir </td><td colspan=1 rowspan=1 > Colin Hannah </td><td colspan=1 rowspan=1 > KBE, CB </td><td colspan=1 rowspan=1 > RAAF </td><td colspan=1 rowspan=1 > January 1970 </td><td colspan=1 rowspan=1 > March 1972 </td><td colspan=1 rowspan=1 > 2 years, 60 days </td></tr>
<tr> <td colspan=1 rowspan=1 > Air Marshal </td><td colspan=1 rowspan=1 > Charles Read </td><td colspan=1 rowspan=1 > CB, DFC, AFC </td><td colspan=1 rowspan=1 > RAAF </td><td colspan=1 rowspan=1 > March 1972 </td><td colspan=1 rowspan=1 > March 1975 </td><td colspan=1 rowspan=1 > 3 years, 0 days </td></tr>
<tr> <td colspan=1 rowspan=1 > Air Marshal Sir </td><td colspan=1 rowspan=1 > James Rowland </td><td colspan=1 rowspan=1 > KBE, DFC, AFC </td><td colspan=1 rowspan=1 > RAAF </td><td colspan=1 rowspan=1 > March 1975 </td><td colspan=1 rowspan=1 > March 1979 </td><td colspan=1 rowspan=1 > 4 years, 0 days </td></tr>
<tr> <td colspan=1 rowspan=1 > Air Marshal Sir </td><td colspan=1 rowspan=1 > Neville McNamara </td><td colspan=1 rowspan=1 > KBE, AO, AFC, AE </td><td colspan=1 rowspan=1 > RAAF </td><td colspan=1 rowspan=1 > March 1979 </td><td colspan=1 rowspan=1 > April 1982 </td><td colspan=1 rowspan=1 > 3 years, 31 days </td></tr>
<tr> <td colspan=1 rowspan=1 > Air Marshal </td><td colspan=1 rowspan=1 > David Evans </td><td colspan=1 rowspan=1 > AC, DSO, AFC </td><td colspan=1 rowspan=1 > RAAF </td><td colspan=1 rowspan=1 > April 1982 </td><td colspan=1 rowspan=1 > May 1985 </td><td colspan=1 rowspan=1 > 3 years, 30 days </td></tr>
<tr> <td colspan=1 rowspan=1 > Air Marshal </td><td colspan=1 rowspan=1 > John Newham </td><td colspan=1 rowspan=1 > AC </td><td colspan=1 rowspan=1 > RAAF </td><td colspan=1 rowspan=1 > May 1985 </td><td colspan=1 rowspan=1 > July 1987 </td><td colspan=1 rowspan=1 > 2 years, 61 days </td></tr>
<tr> <td colspan=1 rowspan=1 > Air Marshal </td><td colspan=1 rowspan=1 > Ray Funnell </td><td colspan=1 rowspan=1 > AC </td><td colspan=1 rowspan=1 > RAAF </td><td colspan=1 rowspan=1 > July 1987 </td><td colspan=1 rowspan=1 > October 1992 </td><td colspan=1 rowspan=1 > 5 years, 92 days </td></tr>
<tr> <td colspan=1 rowspan=1 > Air Marshal </td><td colspan=1 rowspan=1 > Barry Gration </td><td colspan=1 rowspan=1 > AO, AFC </td><td colspan=1 rowspan=1 > RAAF </td><td colspan=1 rowspan=1 > October 1992 </td><td colspan=1 rowspan=1 > November 1994 </td><td colspan=1 rowspan=1 > 2 years, 31 days </td></tr>
<tr> <td colspan=1 rowspan=1 > Air Marshal </td><td colspan=1 rowspan=1 > Les Fisher </td><td colspan=1 rowspan=1 > AO </td><td colspan=1 rowspan=1 > RAAF </td><td colspan=1 rowspan=1 > November 1994 </td><td colspan=1 rowspan=1 > February 1997 </td><td colspan=1 rowspan=1 > 2 years, 92 days </td></tr>
<tr> <td colspan=6 rowspan=1 > Chief of Air Force </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > Air Marshal </td><td colspan=1 rowspan=1 > Les Fisher </td><td colspan=1 rowspan=1 > AO </td><td colspan=1 rowspan=1 > RAAF </td><td colspan=1 rowspan=1 > February 1997 </td><td colspan=1 rowspan=1 > May 1998 </td><td colspan=1 rowspan=1 > 1 year, 89 days </td></tr>
<tr> <td colspan=1 rowspan=1 > Air Marshal </td><td colspan=1 rowspan=1 > Errol McCormack </td><td colspan=1 rowspan=1 > AO </td><td colspan=1 rowspan=1 > RAAF </td><td colspan=1 rowspan=1 > May 1998 </td><td colspan=1 rowspan=1 > June 2001 </td><td colspan=1 rowspan=1 > 3 years, 31 days </td></tr>
<tr> <td colspan=1 rowspan=1 > Air Marshal </td><td colspan=1 rowspan=1 > Angus Houston </td><td colspan=1 rowspan=1 > AO, AFC </td><td colspan=1 rowspan=1 > RAAF </td><td colspan=1 rowspan=1 > June 2001 </td><td colspan=1 rowspan=1 > July 2005 </td><td colspan=1 rowspan=1 > 4 years, 30 days </td></tr>
<tr> <td colspan=1 rowspan=1 > Air Marshal </td><td colspan=1 rowspan=1 > Geoff Shepherd </td><td colspan=1 rowspan=1 > AO </td><td colspan=1 rowspan=1 > RAAF </td><td colspan=1 rowspan=1 > July 2005 </td><td colspan=1 rowspan=1 > July 2008 </td><td colspan=1 rowspan=1 > 3 years, 0 days </td></tr>
<tr> <td colspan=1 rowspan=1 > Air Marshal </td><td colspan=1 rowspan=1 > Mark Binskin </td><td colspan=1 rowspan=1 > AO </td><td colspan=1 rowspan=1 > RAAF </td><td colspan=1 rowspan=1 > July 2008 </td><td colspan=1 rowspan=1 > July 2011 </td><td colspan=1 rowspan=1 > 3 years, 0 days </td></tr>
<tr> <td colspan=1 rowspan=1 > Air Marshal </td><td colspan=1 rowspan=1 > Geoff Brown </td><td colspan=1 rowspan=1 > AO </td><td colspan=1 rowspan=1 > RAAF </td><td colspan=1 rowspan=1 > July 2011 </td><td colspan=1 rowspan=1 > July 2015 </td><td colspan=1 rowspan=1 > 4 years, 0 days </td></tr>
<tr> <td colspan=1 rowspan=1 > Air Marshal </td><td colspan=1 rowspan=1 > Leo Davies </td><td colspan=1 rowspan=1 > AO, CSC </td><td colspan=1 rowspan=1 > RAAF </td><td colspan=1 rowspan=1 > July 2015 </td><td colspan=1 rowspan=1 > Incumbent </td><td colspan=1 rowspan=1 > 3 years, 286 days </td></tr>
</table>
Question:
Who was Sir Charles Burnett and when did he become CAS?
Answer:
The RAF's Air Chief Marshal, Sir Charles Burnett, became CAS in February 1940.