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CAUTION:  TO PREVENTNYLONFITTINGFROMTURNINGWHENDISCONNECTING ELECTRICALCONNECTIONON FUEL PUMPS,A WRENCH MUSTBE USED TO BACK UP EACHCONNECTIONONTANK. IF FITTING TURNS,INTERNAL WIRECONNECTIONSWILLBREAKAND PUMP MUST BE REPLACED.
(g) Whenremovinginboard main fuel cell, removeelectricalconnectionsfromfuelpumpin cell and disconnectandcapfuel lines. (1.) Withdraw pumpfrom tank byremovingfourboltsmountingpumpto tank and wing rib. Lift
pumpthroughaccesshole in wing.
CAUTION:  DO NOTDAMAGESMALLFLAPPERVALVEININTERIORBAFFLE,NEXTTO FUELPUMPMOUNTINGLOCATIONS,WHEN REMOVINGMAIN INBOARD FUELCELLS.
(h)Reachthrough proper accessholeforeach fuel cell. Untie nyloncordsecuringeachcell.
(i)
Removeall cap bolts at access holes attaching cellsto skin brackets. Push cell down and work nyloncordback through cell hangers andrib bushings toends of cell compartment.

(j)  
Removescrewsattachingmountingbracketsto wing skin in each elongatedaccesshole. Removebracketsfrom holes.

(k)
Placetapeor other protectivematerialaroundcellaccessopening,preventingdamageto cell duringremoval.

(I)
Foldcellneatly in wing; tape or tie. Removecellgently through elongatedopeningon top of

wing.
EFFECTIVITY:
040-999

PAGE 6 28-10-00
Jan 10/90
PIPER AIRCRAFT
PA-42-720(AdvancedTrainer)
MAINTENANCEMANUAL

A. Storage (continued)
Gasket

NOTE Lacing in this area to be pulled tight" and "tied off" aftersenderunit installation hasbeencompleted.
Inboard-Main 95 Gallon Fuel Cell Figure 402 
EFFECTIVITY: 040-999  28-10-00  PAGE  7 

PIPER AIRCRAFT
PA-42-720(Advanced Trainer)
MAINTENANCE MANUAL

A. Storage(continued)
Fuel Quanitity Sensor Assembly
Cover Plate
Outboard40 Gallon Fuel Cell
Figure403

EFFECTIVITY:
040-999

Jan 10/9028-10-00
PIPERAIRCRAFT
PA-42-720 (Advanced Trainer)

MAINTENANCEMANUAL

A. Storage (continued)
FuelQuanititySensorAssembly
Bushing
Assembly

Aft Inboard 33 Gallon FuelCell 
Figure 404 
EFFECTIVITY: 
040-999  28-10-00  PAGE9 

PIPERAIRCRAFT
PA-42-720(AdvancedTrainer)
MAINTENANCEMANUAL

A.  Storage (continued)
8.  MoldedNippleFittings
For best servicefromthis type fitting, exercisethe following precautionsat time of installation.
(a)
Applythin film of Simonize Wax to metal tubes tofacilitateinstallationandremoval.

(b)
Insertfuellinesintoeachnipple until endis flush withinsideedge of cell.

(c)
Ensurehoseclampsclearend of fitting by 0.25 inch,wherepossible.

(d)Torquehoseclampsonce.Donot retighten unlesshose clamp isloosenedcompletelyand allowedto set for15 minutes before retightening.
(e) Donotuse sealing pasteorgasketcompound.
9.  Installationof Inboard, Aft-Inboard,and Outboard FuelCells(referto 28-10-00 Figures402,403, and 404)
(a)
Inspectcell compartment.

(b)  
Donot remove cell from shipping containeruntil readyfor installation.

(c)
Ensurecell iswarmenoughto flex. Donot use sharptoolssuchas screwdrivers, files, etc, for installationpurposes.

(d)
Placetape or protective materialoveredges of elongatedaccessopeningto preventdamage to cell.

(e)
Rollcell into proper shapeandsizeto insert through accessopeningcell.

(f)  
Afterfittingcell into wing, unrollcell and establishpropersizing of cellto fit compartment.

(g)
Fromeachend of cell compartment,feed cord throughcell hangers and rib bushingsuntil cordscan be joinedat access openings. Donottie cord but routeasshownin 28-10-00 Figures 402, 403,and 404.

NOTE: The nyloncord holdingfuelcellshas a 0.125 inchdiameterwith a minimum breaking strengthof 550 poundsand conforms to MIL-T-5040C,TypeIIIspecifications.
(h)
Connectfueldrainplateby inserting threadedendof bolt or rod (not underthreeincheslong)up through plate and nipplefittingof fuel cell(refer to 28-10-00 Figure405). Reach through fuelcellopeningandinstall2 or 2 1/2 inch diameterwasheron bolt or rod; secure withnut. Pullnippledownthroughopeningin wing panelenoughto clamp nipplefittingto plate.

(i)  
Removebolt or rod. Secure plateto wing panel andinstall drain valve.

(j)
Oninboardmain cell, install submergedfuelpumpthroughaccessopeningin wing top. Secure to inboard ribwithfourboltsattachingpump.

(k)
Connectelectricalwirestoinboard cell, checkvalveon submergedfuel pump, and connectfuel linestocheckvalve.

(I)
Installfuel cell flangemountingbracketsin elongated accessholeswithscrews.

EFFECTIVITY:

10
PAGE  040-999

Jan10/90 28-10-00
　
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