Piper Malibu Meridian PA-46-500TP Airplane Maintenance Manual page 1273

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(e) Delamination.
Delamination is primarily a vision issue. Cloudy or milky appearance in the critical area
(i.e. - obstructing vision required for safe operation of the aircraft) is cause for immediate
replacement.
(f) Mark-Off of such low intensity that vision quality is not impaired and that is not visible
when looking through the windshield is acceptable.
(g) Distortion. Slight horizontal distortion is acceptable, if: there are no more than two lines;
they do not occupy more than 25 percent of the windshield area, and; they are separated
by a minimum of six inches (15.24 cm).
(2) Semi-Critical Area Inspection. The perimeter area of the acrylic windshield used for general
flight vision.
(a) Crazing.
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PIPER AIRCRAFT, INC.
PA-46-500TP, MALIBU MERIDIAN
MAINTENANCE MANUAL
Determining Depth of Craze
No more than two allowed per 10 in 2 (64.516 cm 2 ) of area (i.e. - an area
approximately 3.16 inch by 3.16 inch).
Scratches exceeding these limits are cause for immediate windshield replacement /
rework (see Window / Windshield Repair / Rework Procedure, below).
Crazing in the windshield is critical.
Determine depth of craze using a calibrated depth gauge or scale (see Figure 1).
Figure 1
56-00-00
Apr 15/07
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