TM 55-1520-240-T
5-3.4 ENGINE AIR PARTICLE SEPARATOR PROVISIONS OPERATION CHECK
16-3.4
INITIAL SETUP
Applicable Configurations:
Helicopters with Engine Air
Particle Separator Provisions
Tools:
Electrical Repairer’s Tool Kit,
NSN 5180-00-323-4915
Multimeter
Materials:
None
Personnel Required:
Aircraft Electrician (2)
References:
TM 55-1520-240-23
Equipment Condition:
TM 55-1520-240-23:
Battery Connected
Electrical Power On
Hydraulic Power Off
Visual Check of Engine Air Particle Separator
Provisions Performed
TASK
RESULT
CHECK CIRCUIT BREAKERS
1.
2.
3.
4.
5.
6.
7.
On NO. 1 PDP extension box, close the following
circuit breakers:
EAPS 1 FAN (1)
EAPS 1 FAN CONT (2)
EAPS 1 BYPASS DOORS (3)
On NO. 2 PDP extension box, close the following
circuit breakers:
EAPS 2 FAN (4)
EAPS 2 FAN CONT (5)
EAPS 2 BYPASS DOORS (6)
On NO. 1 Engine EAPS control box (7), press to
test EAPS BYPASS DOORS OPEN light (8).
On NO. 2 Engine EAPS control box (9), press to
test EAPS BYPASS DOORS OPEN light (10).
ON EAPS control panel (11) set EAPS ENG 1 FAN
switch (12) to ON. At receptacle 151J1 (13) check
for 115VAC between pin A and ground, pin B and
ground, and pin P and ground.
On EAPS control panel (11) set EAPS ENG 1
DOORS switch (14) to OPEN. At receptacle 151J1
(13) check for 28VDC between pin U and ground.
Check for ground on pin a.
On EAPS control panel (11) set EAPS ENG 1
DOORS switch (14) to CLOSE. At receptacle 151J1
(13) check for 28VDC between pin a and ground.
Check for ground on pin U.
16-116
If any circuit breaker opens, close it.
If EAPS 1 FAN circuit breaker (1) opens again, go to
task 4-5.
If EAPS 1 FAN CONT circuit breaker (2) opens again,
go to task 4-5.
If EAPS 1 BYPASS DOORS circuit breaker (3) opens
again, go to task 4-5.
If any circuit breaker opens, close it.
If EAPS 2 FAN circuit breaker (4) opens again, go to
task 4-6. If EAPS 2 FAN CONT circuit breaker (5)
opens again, go to task 4-6. If EAPS 2 BYPASS
DOORS circuit breaker (6) opens again, go to task
4-6.
EAPS BYPASS DOORS OPEN light (8) shall come on
momentarily. If it does not, replace bulb. Press to test
light again. If light still does not come on, go to task
4-7.
EAPS BYPASS DOORS OPEN light (1 O) shall come
on. If it does not, replace bulb. Press to test light
again. If light still does not come on, go to task 16-3.7.
115VAC should be present on pins A, B and P. If
115VAC is not present on any pin, go to task 16-3.8.
If 28VDC is not present on pin U, go to task 16-3.9.
If ground is not present on pin a, go to task 16-3.10.
If 28VDC is not present on pin a, go to task 16-3.11.
if ground is not present on pin U, go to task 16-3.12.
TASK
RESULT
8.
9.
10,
11.
12.
13.
14.
15.
Check for ground on receptacle 151J1 pins G, D
and V.
At receptacle 151J1 (13) place a jumper wire be-
tween pins F & G. On NO. 1 PDP, close CAUTION
PNL LIGHTING circuit breaker (15).
On EAPS control panel (11), set EAPS ENG 2 FAN
switch (17) to ON At receptacle 151J2 (18), check
for 115VAC between pin A and ground, pin B and
ground, and pin P and ground.
ON EAPS control panel (14) set EAPS ENG 2
DOORS switch (19) to OPEN. At receptacle 151J2
(18) check for 28VDC between pin U and ground.
Check for ground on pin a.
On EAPS control panel (14) set EAPS ENG 2
DOORS switch (19) to CLOSE. At receptacle 151J2
(18) check for 28 VDC between pin a and ground.
Check for ground on pin U.
Check for ground on receptacle 151J2 pins G, D
and V.
At receptacle 151 J2 (18), place a jumper wire be-
tween pins F & G.
Remove jumper wires from receptacles 151J1 and
151J2.
If ground is not present, repsir or replace wire be-
tween receptacle and ground stud.
On Master Caution Panel, EAPS 1 FAIL capsule (16)
shall come on. If it does not, go to task 16-3.13.
115VAC shall be present on pins A, B and P. If
115VAC is not present on any pin, go to tash
If 28VDC is not present on pin U, go to task
If ground is not present on pin a, go to task
16-3.14.
16-3.15.
16-3.16.
If 28VDC is not present on pin a, go to task 16-3.17
If ground is not present on pin U, go to task 16-3.18.
If ground is not present, repair or replace wire be-
tween receptacle and ground stud,
On master caution panel, EAPS 2 FAIL capsule (20)
shall come on. If it does not, go to task 16-3.19.
FOLLOW ON MAINTENANCE:
Turn Off Electrical Power
Disconnect Battery
