Oil Filter Indication (APS 3200)

TASK 49-00-00-810-912-A
Oil Filter Indication (APS 3200)

1. Possible Causes

GENERATOR SCAVENGE-FILTER (8069KM)
LUBRICATION FILTER (8076KM)
DIFFERENTIAL PRESSURE INDICATOR-SWITCH (8075KM)
DIFFERENTIAL PRESSURE INDICATOR-SWITCH (8073KM)
wiring
GEN-APU [8XS]
APU [4005KM]

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
ESPM 2052210
ESPM 2053210
ESPM 205321A
AMM 24-23-51-000-001	Removal of the APU Generator
AMM 24-23-51-400-001	Installation of the APU Generator
AMM 49-00-00-710-008	Operational Test of the APU
AMM 49-11-11-000-003	Removal of the Power Plant (APU) (APS 3200)
AMM 49-11-11-400-003	Installation of the Power Plant (APU) (APS 3200)
ASM 496102
AMM 49-90-00-600-005	Oil Change (Drain Procedure) (APS 3200)
AMM 49-91-21-000-002	Removal of the Differential Pressure Switch and Indicator (APS 3200)
AMM 49-91-21-400-002	Installation of the Differential Pressure Switch and Indicator (APS 3200)
AMM 49-91-23-000-001	Removal of the Lube Pump-Filter Differential-Pressure Switch and Indicator (APS 3200)
AMM 49-91-23-400-001	Installation of the Lube Pump-Filter Differential-Pressure Switch and Indicator (APS 3200)
AMM 49-91-41-920-001	Discard Pressure Oil Filter Element (APS 3200)
AMM 49-91-41-920-002	Replace AC-Generator Scavenge Filter-Element (APS 3200)
AMM 49-91-42-000-002	Removal of the Magnetic Drain Plug (APS 3200)
AMM 49-91-42-200-003	Inspection of the Magnetic Drain Plug (APS 3200)
AMM 49-91-42-400-002	Installation of the Magnetic Drain Plug (APS 3200)

3. Fault Confirmation
Subtask 49-00-00-710-272-A ** ON A/C NOT FOR ALL

A. Do the operational test of the APU AMM 49-00-00-710-008.

4. Fault Isolation
Subtask 49-00-00-810-163-D ** ON A/C NOT FOR ALL

A. Maintenance Action
(1) If the APU Last Leg Report gives the maintenance message:

GEN SCAV FILTER (8069KM) AND LUBE FILTER (8076KM)
Fault Code Number: 039

do a visual check of the DIFFERENTIAL PRESSURE INDICATORS of the APU GENERATOR SCAVENGE-FILTER (8069KM) and the APU LUBRICATION FILTER (8076KM).

(a) If the DIFFERENTIAL PRESSURE INDICATORS do not confirm that the APU GENERATOR SCAVENGE-FILTER (8069KM) and/or the APU LUBRICATION FILTER (8076KM) is/are clogged:

replace the DIFFERENTIAL PRESSURE INDICATOR-SWITCH (8075KM) AMM 49-91-21-000-002 and AMM 49-91-21-400-002.

(b) If the fault continues:

replace the DIFFERENTIAL PRESSURE INDICATOR-SWITCH (8073KM) AMM 49-91-23-000-001 and AMM 49-91-23-400-001.

1 If the fault continues:

do a check and repair the wiring from the ECB (59KD) AB/J2, J4 to the OIL FILTER DELTA P-SWITCH P5/1,2 ASM 496102 ESPM 2052210 ESPM 2053210 ESPM 205321A.

(2) If the DIFFERENTIAL PRESSURE INDICATOR confirms that the APU GENERATOR SCAVENGE-FILTER (8069KM) and/or the APU LUBRICATION FILTER (8076KM) is/are clogged:

replace the oil filter elements AMM 49-91-41-920-001 and AMM 49-91-41-920-002,
do an inspection of the removed oil filter elements,
remove the magnetic drain plug AMM 49-91-42-000-002,
do an inspection of the magnetic drain plug AMM 49-91-42-200-003.

(a) If the inspections show that only the element of the generator scavenge filter has caught particles:

replace the GEN-APU [8XS] AMM 24-23-51-000-001 and AMM 24-23-51-400-001,
install the magnetic drain plug AMM 49-91-42-400-002,
change the APU oil AMM 49-90-00-600-005,
start and operate the APU for 5 minutes AMM 49-00-00-710-008,
remove the oil filter elements AMM 49-91-41-920-001 and AMM 49-91-41-920-002,
do an inspection of the removed oil filter elements,
remove the magnetic drain plug AMM 49-91-42-000-002,
do an inspection of the magnetic drain plug AMM 49-91-42-200-003.

1 If you do not find contamination:

install the serviceable oil filter elements AMM 49-91-41-920-001 and AMM 49-91-41-920-002,
install the magnetic drain plug AMM 49-91-42-400-002,
make an entry in the applicable logbook to tell people the facts of your inspections.

2 If you find contamination:

install the oil filter elements AMM 49-91-41-920-001 and AMM 49-91-41-920-002,
install the magnetic drain plug AMM 49-91-42-400-002,
replace the APU [4005KM] AMM 49-11-11-000-003 and AMM 49-11-11-400-003,

(b) If the inspections show that the two oil filter elements have caught more than 20 particles or particles larger than 1.52 mm (0.0598 in.):

install the magnetic drain plug AMM 49-91-42-400-002,
replace the APU [4005KM] AMM 49-11-11-000-003 and AMM 49-11-11-400-003.

(c) If the inspections show that the two oil filter elements and the magnetic drain plug have caught less than 20 particles and the particles are smaller than 1.52 mm (0.0598 in.):

install the magnetic drain plug AMM 49-91-42-400-002,
change the APU oil AMM 49-90-00-600-005,
start and operate the APU for 5 minutes AMM 49-00-00-710-008.
remove the oil filter elements AMM 49-91-41-920-001 and AMM 49-91-41-920-002,
do an inspection of the removed oil filter elements,
remove the magnetic drain plug AMM 49-91-42-000-002,
do an inspection of the magnetic drain plug AMM 49-91-42-200-003.

1 If you do not find contamination:

install the serviceable oil filter elements AMM 49-91-41-920-001 and AMM 49-91-41-920-002,
install the magnetic drain plug AMM 49-91-42-400-002,
make an entry in the applicable logbook to tell people the facts of your inspections.

2 If you find contamination:

install the oil filter elements AMM 49-91-41-920-001 and AMM 49-91-41-920-002,
install the magnetic drain plug AMM 49-91-42-400-002,
replace the APU [4005KM] AMM 49-11-11-000-003 and AMM 49-11-11-400-003,
make an entry in the applicable logbook to tell people the facts of your inspections.

Subtask 49-00-00-710-273-A ** ON A/C NOT FOR ALL

B. Start and operate the APU for 5 minutes AMM 49-00-00-710-008.

[Rev.8 from Aug 2018] 2026.04.04 04:34:25 UTC