SX-16 Nightsun
®
Searchlight System
Maintenance Manual
Document 031734-1/Revision A
031734-1 Revision B
January 27, 2014
o
If the Gimbal has not exceeded its service life (
Inspection Need and Schedule
)
o
If a Gimbal arm is returned to service, follow the installation instructions in the
Gimbal Arm Installation Procedure
section of this manual
4.9
Gimbal Arm Repair
4.9.1
Minor Touch-Up Repairs for Chipped or Peeling Paint
If the inspection reveals no corrosion, except for a few places with chipped or peeling paint (or
powder-coat):
•
To achieve good adhesion and blending, sand the area around the chips or peeling paint
lightly with medium grit sandpaper (120 or 220 grit).
•
Wipe the area clean of sanding residue.
Spectrolab recommends Cardinal A-4101-BK176 and A-4101-BK110 paint for touch-up.
Follow the paint manufacturer’s instructions.
4.9.2
Corrosion Removal
To remove light, superficial corrosion that was not in the area of the doubler plate rivets:
•
Use sandpaper or another form of mechanical abrasion (such as airbrush sandblasting).
•
Use an aircraft approved chemical corrosion remover. For aluminum Gimbals (reference
Gimbal Part Numbers Available by Description
of this manual), use an aircraft rated
aluminum corrosion remover that is appropriate for use on 7075 aluminum alloy. Follow the
manufacturer’s instructions. Make sure to remove all residues before painting.
•
For steel Gimbals (reference
Gimbal Part Numbers Available by Description
of this manual),
use an aircraft rated steel corrosion/rust remover that is appropriate for use on 4130 alloy
steel. Follow the manufacturer’s instructions. Make sure to remove all residues before
painting.
WARNING!
Cracks or loose rivets in Gimbal arm can cause
complete Gimbal structural failure.
Corrosion and flexing can cause cracks in Gimbal arm
under the doubler plate along rivet lines. If cracks
elongate, Gimbal arms or Searchlight can break loose
during flight.
Parts of Gimbal and Searchlight can fall to ground and
cause serious injury, or severe damage to aircraft.
Emergency landing can be caused by mechanical failure
of Searchlight or Gimbal.
To reduce the risk of serious injury or damage:
•
Inspect Gimbal arm for cracks and corrosion as
scheduled
•
Do not fly aircraft if Gimbal has cracks.
•
Remove cracked Gimbal from service immediately
upon discovery
.
•
Replace and destroy cracked Gimbal or one that
reaches service life limit of 7 years (aluminum) or 10
years (steel). There is no approved procedure to
disassemble and re-rivet or repair Gimbal arms;
service life cannot be extended.
Source: Spectrolab, Inc.
21
The document reference is online, please check the correspondence between the online documentation and the printed version.
