Piper Aircraft Corporation Malibu Mirage PA-46-350P, Airplane Maintenance Manual

Page: 1233 / 1956

PAGE 1
Feb 28/07 6J1
56-00-00
PIPER AIRCRAFT, INC.
PA-46-350P, MALIBU MIRAGE
MAINTENANCE MANUAL
GENERAL
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 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 The viewing area of the windshields used for taxiing, takeoff, climb, cruise, and
landing.
Semi-Critical The viewing area used for general flight vision.
Non-Critical Viewing areas not normally used for flight operations.
Distortion Lines in windows or windshields that cause waviness in objects when looking
through the window or windshield.
Crack Critical narrow break, fissure, or separation extending through the entire
thickness of the transparent material.
Craze Fissure on the surface of the transparent material that does not penetrate the
full thickness of the material.
Crazing 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.
Star Craze A condition where several fissures radiate from a central point.
Wedge A condition in a piece of optical glass having a progressive variation in
thickness or absorption from one side to the other.
Scratch An abrasion on the surface of the material caused by contact with rough
abrasives or sharp objects.
Hairline Scratch Visible scratch undetectable when passing a fingernail over the scratch.
Considered non-critical other than being an appearance defect.
Light Scratch 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.
Heavy Scratch 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 (see inspection criteria). Considered non-critical within
certain limitations (see inspection criteria) when occurring to acrylic surfaces.
Chip A chip is considered a small scratch.