Sturmey-Archer Five Speed Hub Not Engaging

A friends bike. When I pull on the indicator spindle as far as it will go (would be gear "1" on the shifter, more or less) the hub stops engaging. Cranks just spin.

Are pawls or something gummed up? Just an adjustment issue? Any ideas? Any input would help.

I've easily adjusted these before. It just doesn't seem like all the gears are present anymore.

Thanks!