Our procrdures dictate engine covers only when the conditions warrant, i.e. blowing snow, ice, freezing rain not high wind. I just looked through our B767 & B757 AMM and could only come up with conditional inspections on windmilling engines in flight due to IFSD with oil pressure below 10 psi. Nothing about windmilling on ground.
Granted if we were turned into the wind or against the wind in a 30 or 40 knot + gale I would be concerned and probably deploy the reversers, but for the most part we deploy reversers to quiet the area we are working in.
Sorry about the following formatting:
From the B757 AMM:
Engine Windmilling Inspection A. General CAUTION:YOU MUST EXAMINE AND
CORRECT THE MALFUNCTIONS OF
THE ENGINE, WHICH CAUSE AN
ENGINE SHUTDOWN IN
FLIGHT, BEFORE THE SUBSEQUENT ENGINE OPERATION. (1) You must do the Engine Windmilling Inspection before the subsequent operation if the engine turned freely because of a shutdown in flight. NOTE: Write the conditions of operation before and after the engine turned freely. The information is necessary to classify the type of windmill and to compare for the subsequent time the engine windmills.
From the A300 AMM:
Prior to further operation, engines which have windmilled as result of in flight shutdown (IFS) must be inspected in accordance with the following: NOTE : Engine operating conditions recorded prior to and after shutdown and during windmilling are required for this inspection and should be retained for future reference. (1)If there was continuous positive oil pressure following engine shutdown and during windmilling, (an indication pump was producing pressure, i.e., pump did not fail, oil lines did not fracture, or rotor/gearbox did not seize, etc) accomplish the following checks: NOTE : During windmilling, oil pressure indications may be low or unreadable, (Below 40 PSIG, 2.76 BARS) which is permissible if oil temperature conditions are within limits. (Ref. 71-00-00, P. Block 201).
I don't have the B727 AMM handy at this time but I've worked on them and the B747 for years. Ground windmilling is not an issue.