"Normal" blue chits inflict 1-2 pts to engine and tail and 1-4 pts to wings and fuselage
Red chits inflict 3-4 to E & T and 5-8 to W & F
IIRC, there are 2 of each for T & E and 4 for W & F
For each "special" chit there are 1 or 2 specimen, see
http://www.youplay.it/play/bm_GameRules.asp