B. Assignmentof Subject Material
Eachchapter,includingthe Introduction sectionto the manual,are marked witha yellow plasticized tab divider. Forease of reference,these dividers shall be staggered.
Thecontent of this publication is organized at three levels. The three levels are:
1. System/ChapterThevarious groups are broken down into major systemssuch as Environmental
-Systems,ElectricalPower,Landing Gear, etc. The systems are arranged more or less alphabeticallyrather than by precedence or importance. Theyare assigned a number, which becomesthefirst element of the standardized numberingsystem.Thus, the element "28" of the number28-40-01refersto the chapter "Fuel".Everythingconcerningthe fuel system will be coveredinthis chapter.
-of an airplane subsystems.These sub-systems are identified bythe second elementof the standard numbering system.The element "40" of the number 28-40-01concernsitselfwith the indicating sectionof the fuelsystem.
2.
Sub-System/SectionThe major systems/chapters are broken downinto
-The individual may be identified element of the standard numberingsystem.Theelement"01"of the number 28-40-01isa subject designator.Thiselementis assigned at the option of the manufacturer andmay or may not be used.
3.
Unit/Subject units within a sub-system/section by the third
C. Application
Anypublicationconformingto the ATA format will use the same basicnumberingsystem. A person wishinginformationconcerningthe indication portion of the fuel system, would refer to the System/ChapterTab 28-Fuel. The table of contents in the front of this chapter will providealist of sub-systemscoveredin this chapter.For example, the fuel system chapter witha full index would contain:
28-00 General
28-10 Storage (Tanks, cells, necks, caps, etc.)
28-20 Distribution(Fuel lines, pumps, valves, controls, etc.)
28-30 Dump (If in-flight dumpingsystemis installed)
28-40 Indicating (Quantity, temperature,pressure,etc.)
The material is arranged in ascending numericalsequence.
Refer to the table of contents fora complete breakdownand list of the System/Chapters.
D. Effectivity
TheLog of EffectiveRevisionsfollowingthe title page of the manualliststhe revisions currently effectiveforthe manual.
EFFECTIVITY:
040-999
Jan 10/90INTRODUCTION
PIPERAIRCRAFT
PA-42-720 (Advanced Trainer)
MAINTENANCEMANUAL
E. Aerofiche
The Air TransportAssociation a specification of America (ATA) has developed for microfiche
reproductionofaircraft publications, for use by all ATA members. The information compiledin this
AeroficheMaintenanceManualwillbe kept currentby revisions distributedperiodically.These
revisionswill supersede allpreviousrevisionsand will be complete Aerofichecard replacements
and shallsupersedeAerofichecardsof the samenumberin the set.
Conversionof Aerofiche code numbers:
alpha/numeric
Example:2J16= Aerofichecardnumbertwo of a given set and grid locationJ16.
First number "2" is the Aerofiche card number.
Letter"J"isthe horizontal line reference per card.
Secondnumber"16" is the vertical line reference percard.
F. IdentifyingRevisedMaterial
A revisionto a page is definedas any changeto the printed matterthatexistedpreviously.Revisions,
additionsand deletions shallbe identified by a vertical black linealongthe left-hand margin of the
pageoppositeonly that portionof the printed matterthatwas changed.
pagenumberand date, will indicatethat the text was unchangedbut the materialwas relocated to a different page.
A black line in the left-handmarginoppositethe chapter/section/subject,
Forparts listings an individual codeletter"R" shall be used on each line to identify revisions.
G. AlphabeticalIndex
Thealphabeticalindexfollowingthisportionof the introduction is provided asan assistance inlocating thedesiredinformation.Thealphabeticalindex provides the chapter and sub-chapter in which any giveninformationmay be found. Referenceto the Table of contentsin the front of the indicated chapterwillprovidethe specific page(s)on which theinformationcan be found.
H. List of EffectivePages
lists the issue dateof each pagethat is effectivefor that chapter.
Thelist of effective pages following eachChapterDivider-Tab,
I. SerialNumberExplanation
Theserial numbering systemused pertains to the effectivityblocksand codes andit is a three
characteralpha-numeric usesthelast three digitsof the aircraft's
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