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

Page: 1240 / 1956

PAGE 8
Feb 28/07
6J8
56-00-00
PIPER AIRCRAFT, INC.
PA-46-350P, MALIBU MIRAGE
MAINTENANCE MANUAL
(e) Distortion.
1 Distortion along the sides of the window within 0.5 inches (12.70 mm) or less of the
retainer is acceptable.
2 Distortion along the upper portion of the window is acceptable if distortion does not
extend downward more than 2.00 inches (50.8 mm) from the top and does not impair
vision.
3 Distortion of the main body of the side window is acceptable providing the distorted
area does not exceed 25 percent of the window area.
E. Crack Inspection - Acrylic Windows and Windshields
CAUTION: PRESSURIZED FLIGHT PROHIBITED WITH CRACKED OR CRAZED
WINDOW/WINDSHIELD.
(1) Perform this inspection annually or each 1,000 hours, whichever occurs first.
NOTE: This inspection should also be performed after repainting when any chemical stripping
agent was used. Use the prism method described in step (3), below, to inspect the
entire circumference of the window for stripper damage/etching; especially in areas
concealed by window frames, retainers, plates, or collars.
(2) Inspect window panes as follows:
(a) Inspect sealant for signs of wear, deterioration, and positive contact with mounting
surfaces.
(b) Inspect window frames, retainers, plates, and collars for cracks, loose rivets or screws,
corrosion, and structural defects.
(3) Inspect bolt holes in windows and co-pilot’s windshield as follows, using Window Inspection Kit
- P/N 766-294. (A 45° acrylic prism and glycerin may be used if kit not available.)
(a) Clean area to be inspected with soap and water to ensure surface is free of oil, dirt, and
wax.
(b) Determine which immersion oil to use: Type A in cold weather; Type B in hot weather.
(c) Apply a small amount of oil to the surface of window adjacent to bolt hole. On initial
application, use a small amount of oil applied directly to one 90° face of inspection prism
in contact with glass or acrylic (see Figure 2).
(d) Press oiled face of prism to glass or acrylic. Slide prism around until a constant film of oil
extends across prism face and window surface.
(e) Look into 90° face of prism (see Figure 2). The image of an unfractured fastener hole will
appear as a frosty cylinder.
(f) If hole is countersunk, cylinder will appear to have a cone setting on one end as seen in
Figure 2.
(g) The image of a cracked hole will appear as a frosty or reflective projection extending from
the hole (see detail A-A, Figure 3).
(h) The image of a crack from one hole to another will appear as a frosty or reflective
irregular surface (see detail B-B, Figure 3).
(4) Crack Limitation.
(a) The maximum acceptable length of a crack from any single screw hole is 0.300 inch
(7.62mm).
(b) The maximum combined length of multiple cracks into the space between two adjacent
bolt holes is 0.300 inch (7.62mm) (see Figure 3).