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

Page: 1239 / 1956

PAGE 7
Feb 28/07 6J7
56-00-00
PIPER AIRCRAFT, INC.
PA-46-350P, MALIBU MIRAGE
MAINTENANCE MANUAL
(d) Scratches.
1 Limits:
1.5 inch (38.1 mm) long
0.025 inch (0.635 mm) deep
0.2 inch (5.080 mm) wide
0.25 in2 (1.613 cm2) total area
2 No more than two allowed per 10 in2 (64.516 cm2) of area (i.e. - an area
approximately 3.16 inch by 3.16 inch).
3 Scratches exceeding these limits are cause for immediate windshield replacement /
rework (see Window / Windshield Repair / Rework, below).
4 Scratches in acrylic cockpit windows may be reworked per Window / Windshield
Repair / Rework, below, if:
a They are less than 0.025 inch (0.635 mm) deep.
b Window is a minimum of 0.225 inch (5.715 mm) thick after rework.
c No vision distortions in critical and semi-critical areas as a result of rework.
5 Replace acrylic windows with scratches that cannot be reworked in accordance with
these standards.
(e) Mark-Off of such low intensity that vision quality is not impaired and that is not visible
when looking through the windshield is acceptable.
(f) Distortion.
1 A moderate amount of distortion is acceptable along the lower portion of the
windshield if no more than 1.5 inches (3.81 cm) above the windshield retrainer strip.
2 Distortion may not be so severe that it restricts vision or diverts runway lines or
section lines more than 45°.
3 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).
D. Acrylic Window (Cabin) Inspection
CAUTION: PRESSURIZED FLIGHT PROHIBITED WITH CRACKED OR CRAZED WINDOW.
(1) The cabin windows are formed from 0.210 inch thick acrylic.
(2) Non-Critical Area Inspection. Any portion of a window not used for flight vision.
(a) Cracks.
Inspect for cracks per Crack Inspection - Acrylic Windows and Windshields, below.
(b) Crazing.
1 Crazing in the windows is critical.
2 Determine depth of craze using a calibrated depth gauge or scale (see Figure 1).
3 A craze of 0.043 inch (1.092 mm) depth is cause for immediate replacement. A craze
0.021 inch (0.533 mm) deep is cause for replacement at the earliest opportunity.
4 Crazing in any portion of a window requires replacement.
(c) Haze or foggy appearance on the glass is not acceptable if the amount of haze/fog
causes an obstruction of vision in the area used for operation of the aircraft.
(d) Mark-Off in moderate amounts is acceptable provided that visibility is not impaired.