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The airplane is equipped with a two piece windshield and eight cabin windows (one is in the door and
one is the emergency exit window).
The pilot's windshield is made of two-ply laminated glass and is heated. The co-pilot's windshield and
windows are made of two-ply laminated clear stretched acrylic. They are installed with sealant and
fasteners as necessary to retain them and prevent water or air leaks.
1.
Limitations
A.
If this airplane must be flown with a cracked or crazed window or windshield it must not be flown in
a pressurized condition.
B.
Pressurized flights with discoloration or haze should be avoided but, if absolutely necessary while
awaiting replacement, flights may be made if careful inspection for crazing is implemented before
each flight.
2.
Definitions.
The following apply to all cockpit and cabin windows and windshields.
Critical
Semi-Critical
Non-Critical
Distortion
Crack
Craze
Crazing
Star Craze
Wedge
Scratch
Hairline Scratch
Light Scratch
Heavy Scratch
Chip
6I17
PIPER AIRCRAFT, INC.
PA-46-500TP, MALIBU MERIDIAN
MAINTENANCE MANUAL
GENERAL
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 certain limitations. Considered non-critical within certain limitations when
occurring to acrylic surfaces.
A chip is considered a small scratch.
56-00-00
Apr 15/07
PAGE 1
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