MD Helicopters 369 Series, Manual

Page: 109 / 110

CSP−HMI−2
MD Helicopters, Inc
.
MAINTENANCE MANUAL
71−10−10
Page 601
Revision 39
ENGINE AIR PARTICLE SEPARATOR
INSPECTION/CHECK
1. Engine Air Inlet Bypass Door 300 − Hour
Inspection
(Ref. Figure 201)
Consumable Materials
(Ref. Section 91 − 00 − 00)
Item Nomenclature
CM425 Sealing compound
Prevent engine FOD. Secure a
cover over the engine intake
prior to working inside plenum chamber.
Use extreme care when working around en-
gine inlet to prevent any foreign object from
entering engine. Remove cover after com-
pleting work.
NOTE:
Inspect Engine Air Inlet Bypass Door
per FAA publication, EA−AC43.13−1B.
(1). Remove engine inlet bypass door and
inspect air bypass door gasket seal for
condition and secure attachment. No
gasket seal deterioration or debonding
allowed. Replace door gasket as
required.
(2). Inspect door surfaces for cracking,
chaffing or damage. Repair door per
Structural Repair Manual (CSP−
SRM−6).
(3). Remove and replace the latch retention
cotter pin (located inside the attach
cable ‘‘U’’ clamp). Seal cotter pin with
sealant (CM425).
(4). Replace latch assembly if:
(a). The cotter pin hole in the latch stem
is elongated more than 0.080 inch
(2.032 mm).
(b). The cotter pin has worn into the
surface of the cable attach ‘‘U’’ clip,
more than 1/2 the thickness of the
clip, 0.025 inch (0.635 mm) deep.
(c). The latch engagement faying surface,
where it contacts the plenum, is worn
more than 0.050 inch (1.270 mm)
below the original surface.
(5). Inspect door hinges for wear and hinge
fastening hardware for security. Repair
or replace hinges as required.
(6). Inspect door for worn or damaged
latching and attachment hardware.
(7). Check insert assembly and latch
linkages for wear and lost motion.
Repair or replace latch hardware as
required.
(8). Inspect door system cable and cable
ends for corrosion, fraying, chaffing and
freedom of movement.
(9). Inspect door system cable pulleys,
pulley bushings and brackets for wear,
damage, freedom of movement and
security.
(10). Reinstall engine inlet bypass door. Seal
all cotter pins with sealant (CM425).
(11). Inspect door for proper alignment when
closed. Door must fit snug against seal
with obvious seal compression.
(12). Inspect latches for positive latching.
(13). Pull FILTER BYPASS CONTROL
handle. Action to be a smooth, positive
door opening with no binding. Release
handle. Handle should snap back to
stowed position.
2. PLM Particle Separator Inspection
(1). Inspect vortex generator tubes for
broken, loose or missing vanes and
center pins.
(2). Inspect outlet tube for security and
damage.
(3). Inspect inlet plate for dents punctures
and cracks.
(4). Inspect vortex tube particle discharge
openings for clogging.
(5). Inspect separator and mist eliminator
mounting seals for secure attachment
and damage. Replace damaged seals.
CAUTION