(b)
Removeall accesspanels, pulleys, and pins (explainedin previous paragraph).
(c)
Carefullyfeedcables through bottomaccessholeon left sideof pedestalundertorquetubefor controlcolumn and backtowardrightside of fuselage wherecablesgo thru pulleysat Fuselage Station101.23 and RightButtline7.9.
(d)
Fromcopilotsideof pedestal, carefullypull and lay cable so screwdrumassemblycanbe installedwith as little cableslackin pedestalassemblyaspossible.
(e)
Carefullypositionscrew drum assemblythroughaccesshole. Positionassemblyon mounting bracketsso universal joint,attachedto trimcontroldriveshaft,can be attached to drum drive shaft.
(f)
Fastenuniversalto drumdriveshaft. Attach screw drumassemblyto support bracket.
(g)Aligncableshandingfromscrewdrum in firstsetof pulleysunderpedestal.Allowcableto go throughpulleyson samesidesas they leavedrums.
(h)
Reinstallpulleysin pulley bracket underpedestal.
(i)
Routecablesthroughpulleysat Station 101.23and backthroughright side of fuselageto Station163.38. Turn cables throughdoublerassemblyon fuselageand out throughwingby pulleysat WingStation31.0. Frompulleyat Station 31.0,cablesgo through holes for snap bushingsin rib at Station 58.5, andtop cablefromfuselagegoesin aft hole. Finally,cables travelout wingto Station 90.0 wheretheyattachto wing aileron tab cables.
(j)
Be sureto connect propertrim cablesand tighten to tensiondescribedin Figure502.
EFFECTIVITY:
040-999 27-10-00
Jan 10/90
PIPER AIRCRAFT
PA-42-720(AdvancedTrainer)
MAINTENANCEMANUAL
A. Aileron and Tab (continued)
15. Removal of Aileron Trim (Wing) (Figure 401)
(a)
Removeaccess plates located under bottom trailing edge of wing at Stations 92.5,117.5, 128.0,151.5,171.0, and 176.0.
(b)
Disconnect trim control link located between trim screw and tab push-pull tube.
(c)
Block both sets of trim cables to prevent unwrapping from their drums and ease removal. Block fuselage cable system at pedestal drum and wing system at tab screw assembly Wing Station 171.0.
(d)
Mark one set of cable ends at Wing Station 90.0 to facilitate installation and disconnect cables at tumbuckles.
NOTE: Note specific routing and hookup of each cable to ensure proper operation after installation.
(e)
Remove fairleads in rib at Station 121.5 by reaching through access openings at Wing Stations
117.5and 128.0.
(f)
Throughaccess opening at Wing Station 150.0, remove appropriate guide pin.
(g)
With screw drum disconnect from tab link assembly, remove bolts securing drum assembly to rear spar.
(h)
Carefully pull screw drum assembly and cables from wing.
16. Installationof Aileron Trim(Wing) (Figure 401)
(a)
Ensureappropriate cable assembly is centered and evenly wrapped on drum (see paragraph titled Wrapping of Trim Drums). Center drum between stops on trim screw and block cables to prevent unwrapping.
(b)
Feed cables back through wing so screw drum is fed up into wing as cable slack becomes less.
(c)
Positionscrew drum assembly inside wing, install attachment bolts, and torque.
(d)
Finish drawing cables through wing. Connect to appropriate tumbuckles at Wing Station 90.0. If fuselage cable system is not installed, block cables at rib Wing Station 121.5 by reaching through access opening at Station 117.5.
(e)
With cables retained, remove cable blocks.
(f)
Connect trim link to screw drum shaft.
(g)
Install cable guard pin at Wing Station 150.0.
(h)
Installsnap bushings at Station 121.5
(i)
If both fuselage and wing cable system are installed and engaged, set cable tension with turnbuckles at Wing Station 90 (Figure 502). Check rigging and adjustment.
(j)
Install all access plates.
17. Riggingof Aileron Controls (Figures 401,402, 501 through 504))
NOTE: The following procedureassumessystem to be far enough in rig to allow all rigging pins to fit in their individual holes at same time.
(a)
Remove access plate to each aileron bellcrank at Wing Station 178.
(b)
Position bellcranks in neutral positions using rigging pins. (AN-3-20 bolts with ribbons attached.) Figure 503)
(c)
Remove access plates under pilot seat and insert rigging pin through the sectors. If pins will not line up in both bellcranks and sectors under pilot seat, proceed as follows: (1.) Align sectors and install rigging pin. (2.) Clamp cables near sectors to prevent any load on rigging pin. (3.) Adjust cables with tumbuckles at Fuselage Station 142 until both aileron bellcrank
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