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., <br />Mr. David R. Hartley Page Two March 6, 1987 <br />We recommend that these companies keep daily timesheets to keep track of total <br />hours worked, both direct and nonchargeable. <br />Please submit to us two copies of any changes that you choose to make on the agree- <br />ment with HAA. Thanks for your cooperation. <br />Sincerely, <br />7~.~c~~~~icllrrac.-+ <br />Richard E. Luhrsen <br />Airport Engineering Specialist <br />Aeronautics Division <br />Room 417 <br />REL:jmb <br />cc: Merland Otto, HAA <br />Oren Burckhardt, FAA <br />