UH-1B aircraft : preventive maintenance services.

"9 May 1975."

CH-47B and CH-47C helicopters : preventive maintenance daily inspection checklist.

"17 August 1982"--P. 1.

UH-1M aircraft : preventive maintenance, daily inspection checklist.

"18 July 1988"--Change no. 1.

AH-1G/S and TH-1G helicopter : preventive maintenance daily.

"14 October 1980."

UH-1H/V and EH-1H/X aircraft : preventive maintenance daily inspection checklist.

"11 January 1983."