(c)  
Check that rigging pin F-1 fits freely in flap control unit.

(d)  
Check that tensions in WFFA and WFFB cables are within limits of that specified in temperature-tension chart in Fig. 501.

(e)  
If conditions in steps (c) and (d) are not within limits: 1) Remove turnbuckle locking clips from WFFA and WFFB turnbuckles. 2) Adjust turnbuckles so that rigging pin F-1 fits freely. Adjust so that cable tension

is within limits of that specified in temperature-tension chart (Fig. 501). 3) Install turnbuckle locking clips.

(f)  
At flap power unit check that WFFA cable has approximately 2-1/4 turns on cable drum, and that WFFB cable has approximately 1/3 turn on cable drum.

(g)  
At flap control unit check that WFFA cable has approximately 1-1/2 turns on cable drum, and that WFFB cable has approximately 2-1/2 turns on cable drum.

(4)  Adjust trailing edge flap control valve.
(a)  
Ensure that flap control lever is in FLAP UP detent.

(b)  
Install rigging pin F-1 in flap control unit (View 1, Fig. 503).