Chord Line --Rudder in neutral position.(neutral Position)
Fin,Rudder and Trim Tab Viewedas seed fromabove.
Rudderand Trim TabControlTravelsand Cable Tensions
Figure 501
EFFECTIVITY:
040-999
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PIPERAIRCRAFT
PA-42-720(Advanced Trainer)
MAINTENANCEMANUAL
A. Rudderand Tab (continued)
Tool P/N 72260
Rudder
RudderRigging Tool
Figure 502
Trim Tab
TrimTab Tool P/N 72266-2
RudderTrim RiggingTool
Figure 503
EFFECTIVITY:
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2720-00
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PIPERAIRCRAFT
PA-42-720(AdvancedTrainer)
MAINTENANCEMANUAL
A. RudderandTab(continued)
10.RudderControlSystemFrictionCheck(Figure601)
NOTE: Whenmeasuringruddercontrolsystemfriction,nosegearmustberetractedorbungeedisconnectedin noselandinggearwheelwell.
Usinga spring scaleplacedon rudder(Figure601),moverudderfromtwoinchestrailingedgeleft
totwoinchestrailingedgerightandback.Measureforceneededtomoveruddereachtime
trailingedgepassesthroughneutral.Bothreadingsmustnotexceed6 pounds.
NOTE: Frictionmeasurements
aretakenwithoutautopilotbridlecablesconnected.Ifbridle cablesare connected, frictionreadingmustnotexceedseven(7)pounds.
11.Removalof ForwardRudderTrimSystem(Figure401)
(a)
Removecopilotseatand floor panelson sameside,fromsparcarry throughto pressurebulkheadF.S.57.0.
(b)
Pulleysaft of forwardscrewdrumare locatedon rightsideof aircraft underfloor at F.S.101.23,280.0,332.0,and 376.0. Rubblocksarelocatedat F.S.162.3,181.0,174.0,and 251.0. To gainaccessto this cablehardware,removerequiredseatsandfloor panels. Iffairleadsfor aft cablesystemin pressure bulkheadF.S.332.0mustbe removed,removerightsidefloor panels.ApproachturnbucklesaroundF.S.312 throughrightsidefloor panelsbetweenbulkheadsat
F.S.310.0 and321.0.
(c)
Blockforwardcablesystemat trim screwunderneathcontrolpedestalandaftcablesystem(if
notremoved)at pressure bulkheadF.S.332.0.If alsoremovingaftruddertrimsystem,block cablesataftscrewdrumon aftcantedbulkheadatF.S.380.35.
(d)
Markonesetofturnbucklecableendstofacilitateinstallationof F.S.312.0.Removecable guidepinsandrubblocksto easeremovalofcables.
(e)
Disconnectcablesfromtumbuckles
andattachtwo23footleaderlinestoeachcableterminal end.
(f)
Fromcockpitat F.S. 78.0,carefullypullcablesthroughaircraft.
(g)
Removefourbolts attachingscrewdrumassemblyto channel plate. Removepin linking drive shaftto drum.
(h)
Pullcablesupto drumanddisconnectleaderlines.
(i)
Removedrumandcableassemblyfromaircraft.
NOTE: Notecableroutingandwhichcables(respectiveto screwdrum)areattachedto which leaderlines.
Rudder
50 TAB
Measurefromhere .50
RudderFrictionCheck
Figure601
EFFECTIVITY:
040-999 Jan 10/9027-20-00
PIPER AIRCRAFT
PA-42-720(AdvancedTrainer)
MAINTENANCEMANUAL
A. Rudderand Tab (continued)
12. Installation of Forward Rudder Trim System (Figure 401)
(a)
Ensure cable is centered and evenly wrapped on trim drum (see paragraph on Wrapping of TrimDrums). Block cables to prevent drum from unwrapping.
(b)
Lay trim drum on floor in front of pedestal and attach leader lines to proper cables.
(c)
From rear of cabin, carefully pull cables throughfuselage ensuring cablesare aligned on pulleys.
(d)
Installcableguide pins and rub blocks.
(e)
Install drive shaft from control and mount the drum assembly on channel plate.
(f)
Follow cable back down fuselage andalign in pulley and rub blocks.
(g)
If aft trim system is not installed, pull cables tight and block them on aft side of F.S. 310.0 bulkhead.
(h)
If aft trim system is installed, engage cables with proper turnbucklesand rig and tighten cables to specifications in Figure 501.
(i)
Conducta final check of all cable routing, pulleys, and rub blocks.
(j)
Install all access plates, carpeting, and seats.
13. Removalof Aft Rudder Trim System (Figure 401)
(a)
Remove right side floor panels between bulkheads F.S. 310.0 to 332.0, two access plates on right side of tail and tail cone (stinger).
(b)
Blockaft trim cables (using one method in 27-00-00, Figure 2) on front side of bulkhead F.S.
332.0to prevent unwrapping from screw drum assembly on aft canted bulkhead.
(c)
Blockforward cables to rear of F.S. 310.0 bulkhead.
(d)
Mark one set of turnbuckle cable ends and remove fairleads in pressure bulkhead F.S. 332.0.
(e)
Disconnect cables at turnbuckles and attach 10 foot leader line to two cable terminal ends.
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