W DOC AIRBUS | TSM A320F

Emergency Shutdown on the Ground (APS 3200)

TASK 49-00-00-810-923-A
Emergency Shutdown on the Ground (APS 3200)

1. Possible Causes
  • water ingress in panel 108VU
  • FIRE EMERG-STOP RELAY (5WF)
  • CTL SW-APU SHUT OFF [1KL]
  • ENG/APU FIRE PNL [1WD]
  • wiring
  • ELECTRONIC CONTROL BOX [59KD]
2. Job Set-up Information
 A. Referenced Information
REFERENCE
DESIGNATION
AMM 05-23-10-200-003
GENERAL VISUAL INSPECTION OF TAIL CONE APU AND ACCESSORY COMPARTMENT (EWIS)
ESPM 2052210
ESPM 2053210
AMM 26-22-00-710-001
Operational Test of the APU Fire-Extinguishing Loop/Squib
AMM 26-22-00-710-002
Operational Test of APU Auto-Fire-Exting. Circuit and the APU LP Fuel-Valve operation using each indiv. motor in turn and Test APU Emerg. Shutdown Circuit
AMM 49-00-00-710-005
Self-Test of the ECB
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)
AMM 49-61-34-000-002
Removal of the Electronic Control Box (ECB) (APS 3200)
AMM 49-61-34-400-002
Installation of the Electronic Control Box (ECB) (APS 3200)
AMM 49-62-00-710-004
Operational Test of the Emergency Shutdown Circuit (using the APU Shut Off Switch 1KL) (APS 3200)
AMM 49-81-41-000-002
Removal of the Exhaust Muffler (APS 3200)
AMM 49-81-41-400-002
Installation of the Exhaust Muffler (APS 3200)
3. Fault Confirmation
Subtask 49-00-00-710-288-A ** ON A/C NOT FOR ALL
A. Do the subsequent checks.
   (1) Make sure the APU FIRE pushbutton switch on the APU FIRE/WARN module (1WD) was not pushed by a person accidentally.
   (2) Make sure the APU SHUT OFF (1KL) switch on the external power-control panel 108VU was not pushed by a person accidentally.
   (3) Make sure that there is no water ingress in the external power-control panel 108VU.
   (4) Make sure that the FDU is not triggered.
   (5) Do the test of the APU fire detection system AMM 26-22-00-710-001.
   (6) Do the test of the APU emergency shutdown system with the APU SHUT OFF pushbutton switch (1KL) AMM 49-62-00-710-004.
   (7) Do the operational test of the APU AUTO Fire Extinguishing AMM 26-22-00-710-002.
   (8) Do the ECB BITE Test AMM 49-00-00-710-005.
4. Fault Isolation
Subtask 49-00-00-810-362-A ** ON A/C NOT FOR ALL
A. If you find signs of water ingress in panel 108VU :
  • remove the APU SHUT OFF switch (1KL).
  • do a check for moisture/corrosion on the electrical connections.
  • dry the electrical connections.
  • re-install the APU SHUT OFF switch (1KL).
Subtask 49-00-00-810-213-A ** ON A/C NOT FOR ALL
B. If you do not find the signs of a fire and the tests do not confirm the fault:
  • do an inspection of the APU and the APU compartment and make sure that you do not find the signs of a fire AMM 05-23-10-200-003,
  • do a check and make sure that the APU bleed-air duct is in the correct condition and connected correctly,
  • do a check and make sure that the APU exhaust duct is in the correct condition and connected correctly.
   (1) If you find the signs of a fire when you do the inspection of the APU and the APU compartment:
  • do the applicable repair(s).
   (2) If the APU bleed-air duct is not in the correct condition and/or connected correctly:
   (3) If the APU exhaust muffler is not in the correct condition and/or connected correctly:
   (4) If the APU bleed-air duct and the APU exhaust muffler are in the correct condition and connected correctly:
  • refer to Para. 4.B.
Subtask 49-00-00-810-214-A ** ON A/C NOT FOR ALL
C. If the tests confirm the fault:
  • do a check and make sure that the FIRE EMERG-STOP relay (5WF) is serviceable,
  • do a check and make sure that the APU SHUT OFF pushbutton switch (1KL) is serviceable,
  • do a check and make sure the APU FIRE/WARN module (1WD) is serviceable.
   (1) If the FIRE EMERG STOP relay (5WF) is not serviceable:
  • replace the FIRE EMERG-STOP RELAY (5WF).
   (2) If the APU SHUT OFF pushbutton switch (1KL) is not serviceable:
  • replace the CTL SW-APU SHUT OFF [1KL] .
   (3) If the APU FIRE/WARN module (1WD) is not serviceable:
  • replace the ENG/APU FIRE PNL [1WD] .
   (4) If the FIRE EMERG STOP relay (5WF), the APU SHUT OFF pushbutton switch (1KL) and the APU FIRE/WARN module (1WD) are serviceable:
  • do a check and repair the wiring :
  • from the FIRE EMERG STOP relay (5WF) A/D1 to the ECB (59KD) AB/B4.
  • from the APU FIRE/WARN module (1WD) F/S to the ECB (59KD) AB/B4.
  • from the APU SHUT OFF pushbutton switch (1KL) 1 to the ECB (59KD) AB/B4 ESPM 2052210 ESPM 2053210.
     (a) If the fault continues:
Subtask 49-00-00-810-215-B ** ON A/C NOT FOR ALL
D. If the APU Last Leg Report gives the maintenance message:


Fault Code Number: 113, 136


NOTE: The APU SHUTDOWNS report gives the maintenance message:
EMERGENCY STOP
APU Auto Shut Down Fault Code Number: 113, 136


   (1) Replace the ELECTRONIC CONTROL BOX [59KD] AMM 49-61-34-000-002 and AMM 49-61-34-400-002.
Subtask 49-00-00-810-216-A ** ON A/C NOT FOR ALL
E. If you do not find the signs of a fire and the tests give a different maintenance message, do the trouble shooting procedure related to the maintenance message.
Subtask 49-00-00-810-217-A ** ON A/C NOT FOR ALL
F. Do the tests as given in the Para. 3.
[Rev.8 from Aug 2018] 2026.04.04 04:34:26 UTC
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