(b)
Attach spring scale to lower trailing edge of rudder, forward of tab. (Shown in Figure 3.)
(c)
Withspring scale attached, position rudder trailing edge left approximately 2 inches from neutral position.
(d)
Record force required to move rudder through neutral position and until trailing edge is approximately2 inches to right of neutral.
(e)
Recordrestraining force, moving rudder from 2 inch right position, through neutral position, to original 2 inch left position. Force required in either direction must not exceed 6 pounds.
(f)
With nose gear extended, repeat steps 1 through 5 above. The force required in either direction must not exceed 8 pounds.
Rudder
.50 Tab
Here
RudderFriction Measurement
Figure 3
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PA-42-720 (Advanced Trainer)
MAINTENANCE MANUAL
CHAPTER 56
LIST OF EFFECTIVE PAGES
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Feb 1/98
PIPER AIRCRAFT
PA-42-720(Advanced Trainer)
MAINTENANCE MANUAL
CHAPTER 56 -WINDOWS
TABLE OF CONTENTS
SUBJECT
Windows Inspectionof Windows and Windshields WindowInspection WindowRepair/ReworkProcedure(Side Acrylic Windows Only) CleaningWindshieldandWindows
Flight Compartment Removalof Standard Windshield Installationof Standard Windshield StormWindow Removalof Storm Window Assembly
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Installationof Storm WindowAssembly 3
Cabin Removal of Side Windows Installationof Side Windows EmergencyExitWindow
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CONTENTS
PIPER AIRCRAFT
PA-42-720 (Advanced Trainer)
MAINTENANCE MANUAL
Windows
A. Inspection of Windows and Windshields
1. Window Inspection
(a) DEFINITIONS. The following apply to all cockpit and cabin windows.
Critical Semi-Critical
Non-Critical Distortion Crack Craze Crazing Star Craze
Wedge Scratch Hairline Scratch Light Scratch
Heavy Scratch
Chip Haze Blemish
Mark-Off
Delamination
The viewing area of the windshields used for taxiing, takeoff, climb, cruise, and
landing.
The viewing area used for general flight vision.
Viewing areas not normally used for flight operations.
Lines in windows or windshields that cause waviness in objects when looking
through the window or windshield.
Critical narrow break, fissure, or separation extending through the entire thickness
of the transparent material.
Fissure on the surface of the transparent material that does not penetrate the full
thickness of the material.
Mesh of fine hairline cracks that do not penetrate the full thickness of the material,
located on the surface or within the structure of the transparent material.
A condition where several fissures radiate from a central point.
A condition in a piece of optical glass having a progressive variation in thickness
or absorption from one side to the other.
An abrasion on the surface of the material caused by contact with rough abrasives
or sharp objects.
Visible scratch undetectable when passing a fingernail over the scratch.
Considered non-critical other than being an appearance defect.
A scratch measuring less than 0.010 inch (0.254 mm) deep. Can be detected when
passing a fingernail over the scratch. Considered non-critical except for
appearance.
A scratch measuring more than 0.010 inch (0.254 mm) deep. Can be detected
when passing a fingernail over the scratch. This type of scratch may be
accompanied by chipping along the edge. Considered critical when occurring to
inner glass ply. Considered semi-critical when occurring to outer glass ply within
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