Textron Cessna - Page 62

McCAULEYPROPELLERSYSTEMS
CONSTANTSPEEDCOMPOSITEOWNER/OPERATOR
INFORMATIONMANUAL
EXAMPLE:RotationalmovementofNo.1blademeasures1.2degrees,andNo.2
blademeasures2.3degrees.Thiswouldbeconsideredexcessivesince
thedifferencebetweenbladeNo.1andBladeNo.2isgreaterthan1.0
degree.
(c)ThecauseoftheexcessivedifferencemustbedeterminedbyanFAAapprovedPart145
PropellerRepairStationorinternationalequivalent.
(3)Bladeanglesplitisameasurementoftheangledifferencesbetweenallthebladesinthesame
propeller.Thisvalueismuchmorecriticalthanrotationalplaydescribedabove,asahighblade
anglesplitmayindicateinternalproblems.Whilesuchanglesplitisveryrare,theoperatormay
wanttomeasureitifaproblemissuspected,mostnotablybyamarkedincreaseinpropeller
vibrationlevels.Bladeanglesplitmaybecheckedasfollows:
(a)Byhand,twistallofthepropellerbladestowardlowpitch.Thiswilleliminateanyplayin
thepropellerlinkage,andreducethepossibilityofafalseanglereading.
(b)Usingapropellerprotractorattheappropriatereferencestation,measuretheangleofeach
blade.
1
Ifmeasurementsdiffergreatly(morethan0.2degrees)betweenbladesonthesame
propeller,excessivewearordamagetointernalpartsmayexist.
2
Ifthebladeanglesplitisinexcessof0.2degrees,thepropellermustberemoved
fromserviceandoverhauledatanFAAapprovedPart145PropellerRepairStation
orinternationalequivalentbypersonneltrainedtooverhaulMcCauleycomposite
propellers.
11.EngineOilContaminationInspectionRequirements
A.AnypropellerexposedtoengineoilcontaminationmustberemovedandsenttoanFAAapproved
Part145PropellerRepairStationorinternationalequivalentforinspection.Refertotheservice
informationoftheenginemanufacturertodetermineifoilcontaminationhasoccurredortodetermine
theacceptableamountofmetalparticlesallowedinengineoil.
12.FireInspection
A.Anypropellerexposedtoreorexcessiveheatisconsideredunairworthyandmustberemoved
fromserviceandscrapped.Apropellerisconsideredexposedtoreorexcessiveheatifafterthe
suspectedexposureitshowsanyofthefollowingconditions:
(1)Bubbledpaint.
(2)Discoloredpaint.
(3)Discoloredmetal.
(4)Meltedareas.
13.PropellerBladeDamageAssessmentandDisposition
A.Refertothetablethatfollowsfortheassessmentofdamagetothepropellerblade:
Table602.PropellerDamageAssessmentandDisposition
ItemNo.
Condition
Disposition
(1)VisualInspection(propellerinstalledon
airplane)
Pilot,operator,oraircraftmechanicassessment
(2)
PaintWear
Pilot,operator,oraircraftmechanicassessment
(3)SurfaceNicksPilot,operator,oraircraftmechanicassessment
(4)Scrapes
Initialassessmentbythepilot,operator,or
aircraftmechanic,mayneedtobeevaluated
atanFAAapprovedpropellerrepairstationor
internationalequivalentfacility.
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©McCauleyPropellerSystemsJan9/2017