48-14-03 BEECH: Applies to Models AT-11 and C18S.
Compliance required by next periodic inspection but not later than July 1, 1948.
Inspect the lower member of the center section main wing spar in the landing gear nacelle area for evidence of wear caused by chafing of the cabin heater control housing. To prevent chafing either use clamps to support housing or cover control housing with 20-inch length of synthetic rubber hose.