Quoted from vec-tor:Service Bulletin Book 1991
SB22
Problem: Trap Door Flap ( A-13962 ) bending or breaking.
Solution: install bracket 01-10223 with Phillips trusshead screw.
---------- ( part # 4106-01033-08 )
pg.17 has drawing of setup.
Basically an air gap in the front blue tempered steel plate and playfield.
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SB 28
Stress on the A-14155 Trap Door Hinge.
remount Trap Door Mechanism Assembly
forward .150"
Remove some material from chute assembly A-13966
Out of all the FH restos that I've followed here and i think I've covered em all, you might be only the second person to mention this. I've often wondered why this wasn't brought up more often
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