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

Page: 236 / 1956

PIPER AIRCRAFT, INC.
PA-46-350P, MALIBU MIRAGE
MAINTENANCE MANUAL
PAGE 10
Feb 28/07
1K10
20-00-00
10. Dye Penetrant Inspections
NOTE: The following procedure is general in nature. See manufacturer's instructions, included with dye
penetrant kit, for specifics.
A. Using a volatile cleaner, thoroughly remove dirt, loose scale, oil and grease from surface to be
inspected.
B. Heat surface to at least 70°F (21°C), but not exceeding 130°F (54°C).
C. Apply penetrant by brushing, spraying, or dipping. Let stand 2 to 15 minutes, depending on
temperature.
D. Remove surplus penetrant by applying special cleaner recommended by penetrant manufacturer, or
by rinsing with water. Allow housing to dry.
E. Apply a light, even coat of developer by spraying, brushing, or dipping. Cracks or other opening in
surface being inspected will appear as bright red. An indication of size of the defect may be
obtained by watching the size and rate of growth of red indication.
11. Threaded Fastener Installation
(PIR-PPS20015-1, Rev. S.)
A. Fastener Lengths
Fastener lengths must be long enough to prevent bearing loads on threads. The complete chamfer
or end radius of the fastener or screw must extend through the nut.
The specified fastener grip length can be varied by one size (longer or shorter) to meet
requirements stated above. Where needed, use a maximum of two standard filler washers (spacers)
under the nut to adjust for fastener length or alignment of cotter key hole. Where nutplates are used,
adjust for protruding head fastener length by using up to a maximum of two standard filler washers
under the fastener head.
B. Washer Usaqe
Add a maximum of two NAS1149 washers (of the correct diameter, material and finish that matches
the fastener being installed) under fastener heads or nuts to correct for variations in material
thickness within the tolerances permitted.
C. Self-locking Fasteners
The use of self-locking nuts, fasteners and screws, including fasteners with non-metallic inserts is
subject to the following limitations:
(1) Fasteners incorporating self-locking devices must not be re-used if they can be run up using
less than the required minimum torque values specified or as shown in Chart 2, 91-10-00.
They may be reused, if hand tools are required to run them up, providing there is no obvious
damage to the self-locking device prior to installation.
(2) Fasteners 5/16 inch diameter and over with cotter pin holes may be used with self-locking nuts.
Nuts with non-metallic locking devices may be used in this application only if the fasteners are
free from burrs around the cotter pin holes.
(3) Self-locking nuts must not be used at joints which subject either the nut or the fastener to
rotation.
(4) Self-locking fasteners shall never be tapped or rethreaded. Nuts, fasteners and screws with
damaged threads or rough ends shall not be used, or rethreaded.
D. Torque
See Torque Requirements, 91-10-00.