[ARC5] Those Yellow "Serviceable Part" Tags.

[D. Platt]

I can't begin to relate to tags from WWII but in the late 50's thru the 
70's, AFTO 66-1 specifies the use of airworthiness or serviceability 
tags.  As others point out, yellow denotes serviceable, green denotes 
repairable, and red denotes unserviceable.  Items in transit retained 
one copy of the AFTO Form 210.   Then, you have the codes placed on the 
tags.  Things such as NRTS (Not Repairable this Station) would be found 
on units to be sent to a AMC depot.   I do not, however, ever recall the 
aircraft tail number being placed on the tag itself.  Rather, the AFTO 
210, 211, or 212 (modification document) could show from what airframe 
the equipment was removed.  That said, what was generally written in was 
a code designating the organization having custody of the equipment.

Jeep K3HVG