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Booster Tip and Ferrule Inspection | Up
Aviation Structural Mechanic E2 - How airplanes are built and how to maintain them | Next
Reporting |
2. Screw the detonating cord inspection gauge
onto the fitting nut until the skirted ferrule
bottoms in the gauge.
3. Place the flat surface of the bar against the
recessed portion of the gauge. If the booster tip
is too short, the bar will contact flats on both sides
of the gauge. In this case, the SMDC or FCDC
must be replaced.
4. Place the flat surface of the bar against the
raised portion of the gauge. If the booster tip is
too long, the bar will contact the tip and one side
of the gauge. Again the SMDC or FCDC must
be replaced.
5. Place the cylindrical end of the bar in the
space between the gauge and the booster tip. If
the booster tip is not concentric within 0.010-inch
tolerance in radius, the bar will not pass
completely around the booster tip. The SMDC or
FCDC must be replaced.
6. If a condition exists that requires the
SMDC or FCDC to be replaced, tag it as
defective.
Booster Tip Repair
Repair of SMDC booster tips is limited to
replacement of packings on the tips and replace-
ment of a damaged seal (fig. 2-23.) The following
instructions apply to the repair of booster tips:
1. Visually inspect the seal.
2. If it is damaged, remove the seal.
3. Use a clean cloth moistened with Nozel
No. 18 solvent to clean the existing adhesive.
4. Apply a thin coat of RTV-102 adhesive to
the inside diameter of the skirted ferrule. Ensure
that the adhesive does not come in contact with
the booster tip.
5. Install the seal on the tip.
6. Allow the tip to dry and reinstall the
SMDC. Tighten the SMDC with your fingers to
prevent stripping of the nut.
7. Tighten the SMDC or FCDC fitting nut to
the proper torque in accordance with the MIMs
and safety it with lockwire.
8. Quality assurance personnel will inspect
all SMDC and FCDC fitting nut torquing and
safetying.
SAFETY PRECAUTIONS
Cartridges used in cartridge-actuated person-
nel escape devices must function perfectly the first
time. Malfunction of the device, or failure to fire
when needed, usually results in severe injury to
or death of the pilot and crew member(s), and
damage to or destruction of the aircraft.
Cartridges are carefully designed and
manufactured, but their performance in cartridge-
actuated devices is dependable only when they
have been properly handled and installed. Care
must be observed to maintain the devices in
perfect condition.
Since individual cartridges cannot be tested,
the responsibility for proper functioning is in the
Figure 2-23.—SMDC/FCDC booster tip repair.
2-30
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