APU AUTO SHUTDOWN - NO ACCELERATION, De-Oil Solenoid Fault (131-9(A))

TASK 49-00-81-810-838-A
APU AUTO SHUTDOWN - NO ACCELERATION, De-Oil Solenoid Fault (131-9(A))

1. Possible Causes

DEOIL SOLENOID SHOWS OPEN CIRCUIT
DEOIL SOLENOID SHOWS CIRCUIT FAILURE
damage/contamination of the electrical connector P15
DE-OIL SOLENOID VALVE (P15)
aircraft wiring
ELECTRONIC CONTROL BOX [59KD]
DE-OIL SOLENOID VALVE (8083KM)
DATA MEMORY MODULE (P20)
DATA MEMORY MODULE (8062KM)

2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	MULTIMETER - STANDARD

B. Referenced Information

REFERENCE	DESIGNATION
AMM 49-00-00-860-008	APU Start by External Power
ASM 496104
AMM 49-61-34-000-003	Removal of the Electronic Control Box (ECB) (131-9(A))
AMM 49-61-34-400-003	Installation of the Electronic Control Box (ECB) (131-9(A))
AMM 49-73-32-000-001	Removal of the Data Memory Module (131-9(A))
AMM 49-73-32-400-001	Installation of the Data Memory Module (131-9(A))
AMM 49-91-49-000-003	Removal of De-Oil Solenoid (131-9(A))
AMM 49-91-49-400-003	Installation of De-Oil Solenoid (131-9(A))

3. Fault Confirmation
Subtask 49-00-81-710-164-A ** ON A/C NOT FOR ALL

A. Read-out of ECB Trouble-Shooting Data
(1) Put the APU MASTER SW to the ON position.
(2) Get access to the APU SHUTDOWN report.
(3) Push the '>' adjacent to LRU DATA:

the MCDU menu shows
DEOIL SOLENOID SHOWS OPEN CIRCUIT

DEOIL SOLENOID SHOWS CIRCUIT FAILURE

(4) Start the APU and apply Bleed Air for 20 seconds, minimum AMM 49-00-00-860-008.

4. Fault Isolation
Subtask 49-00-81-810-115-A ** ON A/C NOT FOR ALL

A. If an APU auto shutdown occurs during the APU operation and the APU SHUTDOWN report gives the maintenance message:

NO ACCELERATION
DEOIL SOLENOID P15

associated with the Fault Code Number (FCN) 133

do a check for damage/contamination of the electrical connector P15 of the DE-OIL SOLENOID VALVE (P15)

(1) If the electrical connector P15 is damaged/contaminated:

do a repair/cleaning.

(2) If the electrical connector P15 is OK:

use a MULTIMETER - STANDARD to do a resistance check across the pin 1 to the pin 2 of the DE-OIL SOLENOID VALVE (P15)

(a) If the resistance value is > 80 Ohms:

replace the DE-OIL SOLENOID VALVE (P15) AMM 49-91-49-000-003 and AMM 49-91-49-400-003.

(b) If the resistance value is in the specified limit:

do a check and repair of the aircraft wiring from
the ECB (59KD) AB/4J to the DE-OIL SOLENOID (P15) P15/1
and
the DE-OIL SOLENOID (P15) P15/2 to GND
ASM 496104.

1 If the fault continues:

replace the ELECTRONIC CONTROL BOX [59KD] AMM 49-61-34-000-003 and AMM 49-61-34-400-003.

Subtask 49-00-81-810-123-A ** ON A/C NOT FOR ALL

B. If an APU auto shutdown occurs during the APU operation and the APU SHUTDOWN report gives the maintenance message:

NO ACCELERATION
DEOIL SOLENOID P15

associated with the Fault Code Number (FCN) 134

do a check for damage/contamination of the electrical connector P15 of the DE-OIL SOLENOID VALVE (P15)

(1) If the electrical connector P15 is damaged/contaminated:

do a repair/cleaning.

(2) If the electrical connector P15 is OK:

use a MULTIMETER - STANDARD to do a resistance check across
pin 1 and pin 2; required value > 10 Ohms
and
pin 1 and pin 3; required value > 100 kOhms
of the DE-OIL SOLENOID VALVE (P15)

(a) If the resistance values are out of the specified limits:

replace the DE-OIL SOLENOID VALVE (P15) AMM 49-91-49-000-003 and AMM 49-91-49-400-003.

(b) If the resistance values are in the specified limits:

use a MULTIMETER - STANDARD to do a resistance check across
pin 2 and pin 3; required value > 10 Ohms
and
pin 2 and pin 15; required value > 100 kOhms
of the DATA MEMORY MODULE (P20)

1 If the resistance values are out of the specified limits:

replace the DATA MEMORY MODULE (P20) AMM 49-73-32-000-001 and AMM 49-73-32-400-001.

2 If the resistance values are in the specified limits:

do a check and repair of the aircraft wiring from
the ECB (59KD) AB/4J to the DE-OIL SOLENOID (P15) P15/1
and
the DE-OIL SOLENOID (P15) P15/2 to GND
and
the ECB (59KD) AB/4J to the DATA MEMORY MODULE (P20) P20/2
and
the DATA MEMORY MODULE (P20) P20/3 to GND
ASM 496104.

a If the fault continues:

replace the ELECTRONIC CONTROL BOX [59KD] AMM 49-61-34-000-003 and AMM 49-61-34-400-003.

Subtask 49-00-81-810-115-B ** ON A/C NOT FOR ALL

C. If an APU auto shutdown occurs during the APU operation and the APU SHUTDOWN report gives the maintenance message:

NO ACCELERATION
DEOIL SOLENOID (8083KM)

associated with the Fault Code Number (FCN) 133

do a check for damage/contamination of the electrical connector P15 of the DE-OIL SOLENOID VALVE (8083KM)

(1) If the electrical connector P15 is damaged/contaminated:

do a repair/cleaning.

(2) If the electrical connector P15 is OK:

use a MULTIMETER - STANDARD to do a resistance check across the pin 1 to the pin 2 of the DE-OIL SOLENOID VALVE (8083KM)

(a) If the resistance value is > 80 Ohms:

replace the DE-OIL SOLENOID VALVE (8083KM) AMM 49-91-49-000-003 and AMM 49-91-49-400-003.

(b) If the resistance value is in the specified limit:

do a check and repair of the aircraft wiring from
the ECB (59KD) AB/4J to the DE-OIL SOLENOID (8083KM) P15/1
and
the DE-OIL SOLENOID (8083KM) P15/2 to GND
ASM 496104.

1 If the fault continues:

replace the ELECTRONIC CONTROL BOX [59KD] AMM 49-61-34-000-003 and AMM 49-61-34-400-003.

Subtask 49-00-81-810-123-B ** ON A/C NOT FOR ALL

D. If an APU auto shutdown occurs during the APU operation and the APU SHUTDOWN report gives the maintenance message:

NO ACCELERATION
DEOIL SOLENOID (8083KM)

associated with the Fault Code Number (FCN) 134

do a check for damage/contamination of the electrical connector P15 of the DE-OIL SOLENOID VALVE (8083KM)

(1) If the electrical connector P15 is damaged/contaminated:

do a repair/cleaning.

(2) If the electrical connector P15 is OK:

use a MULTIMETER - STANDARD to do a resistance check across
pin 1 and pin 2; required value > 10 Ohms
and
pin 1 and pin 3; required value > 100 kOhms
of the DE-OIL SOLENOID VALVE (8083KM)

(a) If the resistance values are out of the specified limits:

replace the DE-OIL SOLENOID VALVE (8083KM) AMM 49-91-49-000-003 and AMM 49-91-49-400-003.

(b) If the resistance values are in the specified limits:

use a MULTIMETER - STANDARD to do a resistance check across
pin 2 and pin 3; required value > 10 Ohms
and
pin 2 and pin 15; required value > 100 kOhms
of the DATA MEMORY MODULE (8062KM)

1 If the resistance values are out of the specified limits:

replace the DATA MEMORY MODULE (8062KM) AMM 49-73-32-000-001 and AMM 49-73-32-400-001.

2 If the resistance values are in the specified limits:

do a check and repair of the aircraft wiring from
the ECB (59KD) AB/4J to the DE-OIL SOLENOID (8083KM) P15/1
and
the DE-OIL SOLENOID (8083KM) P15/2 to GND
and
the ECB (59KD) AB/4J to the DATA MEMORY MODULE (8062KM) P20/2
and
the DATA MEMORY MODULE (8062KM) P20/3 to GND
ASM 496104.

a If the fault continues:

replace the ELECTRONIC CONTROL BOX [59KD] AMM 49-61-34-000-003 and AMM 49-61-34-400-003.

Subtask 49-00-81-710-165-A ** ON A/C NOT FOR ALL

E. Do the test given in Para. 3.

[Rev.8 from Aug 2018] 2026.04.04 04:34:35 UTC