W DOC AIRBUS | TSM A320F

APU AUTO SHUTDOWN - CLOGGED OIL FILTER, Oil Filter clogged (onspeed) (131-9(A))

TASK 49-00-81-810-849-A
APU AUTO SHUTDOWN - CLOGGED OIL FILTER, Oil Filter clogged (onspeed) (131-9(A))

1. Possible Causes
  • OIL FILTER SHOWS CLOGGED
  • contamination of the MAGNETIC-DRAIN PLUG
  • contamination of the GEN SCAV OIL FILTER (P5) and LUBE PUMP OIL FILTER (P9)
  • GEN-APU [8XS]
  • APU [4005KM]
  • contamination of the GEN SCAV OIL FILTER and LUBE PUMP OIL FILTER
2. Job Set-up Information
 A. Referenced Information
REFERENCE
DESIGNATION
TSM TASK 49-90-00-810-812-A
Lube Pump Filter SW P9/GEN SCAV Filter SW P5 Fault (131-9(A))
AMM 24-23-51-000-001
Removal of the APU Generator
AMM 24-23-51-400-001
Installation of the APU Generator
AMM 49-00-00-860-008
APU Start by External Power
AMM 49-00-00-860-009
APU Shutdown by External Power (131-9(A))
AMM 49-11-00-000-006
Removal of the Generator Substitution Kit after Trouble Shooting (131-9(A))
AMM 49-11-00-400-006
Installation of the Generator Substitution Kit for Trouble Shooting (131-9(A))
AMM 49-11-11-000-004
Removal of the Power Plant (APU) (131-9(A))
AMM 49-11-11-400-004
Installation of the Power Plant (APU) (131-9(A))
AMM 49-90-00-600-008
Oil Change (Drain Procedure) (131-9(A))
AMM 49-91-41-200-002
Remove and Discard Oil Filter Elements (131-9(A))
AMM 49-91-42-200-004
Inspection of the Metal Chip Detector (131-9(A))
3. Fault Confirmation
Subtask 49-00-81-710-188-A ** ON A/C NOT FOR ALL
A. Read-out of ECB Trouble-Shooting Data
CAUTION: DO NOT OPERATE THE APU FOR TROUBLESHOOTING. CONTAMINATION IN THE OIL CAN CAUSE MORE DAMAGE TO THE APU.
   (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
    OIL FILTER SHOWS CLOGGED

4. Fault Isolation
Subtask 49-00-81-810-130-A ** ON A/C NOT FOR ALL
A. If an APU auto shutdown occurred during the APU operation and the APU SHUTDOWN report gives the maintenance message:

CLOGGED OIL FILTER
LUBE PUMP FILTER P9 + GEN SCAV FILTER P5

associated with Fault Code Numbers (FCN) 102

  • If the TSM steps below do not clear the fault, do the TSM task (Ref. TSM TASK 49-90-00-810-812).
  • do a check for contamination of the MAGNETIC-DRAIN PLUG AMM 49-91-42-200-004.
  • do a check for contamination of the GEN SCAV OIL FILTER (P5) and LUBE PUMP OIL FILTER (P9):
    - remove the GEN SCAV OIL FILTER (P5) and LUBE PUMP OIL FILTER (P9) and do a check of the removed oil filter elements AMM 49-91-41-200-002.
   (1) If the oil filter element(s) is/are contaminated with:
. copper wire particles,
. nonmetallic flakes,
. phenolic resin.
     (a) If there is no contamination of the oil filter elements after 15 minutes APU operation:
     (b) If the oil filter elements are contaminated again after 15 minutes APU operation:
   (2) If the oil filter element(s) is/are contaminated with brass or silver-plated steel particles:
Subtask 49-00-81-810-130-B ** ON A/C NOT FOR ALL
A. If an APU auto shutdown occurred during the APU operation and the APU SHUTDOWN report gives the maintenance message:

CLOGGED OIL FILTER
GEN SCAV + LUBE FILTER (8069KM) / (8076KM)

associated with Fault Code Numbers (FCN) 102

  • If the TSM steps below do not clear the fault, do the TSM task (Ref. TSM TASK 49-90-00-810-812).
  • do a check for contamination of the MAGNETIC-DRAIN PLUG AMM 49-91-42-200-004.
  • do a check for contamination of the GEN SCAV OIL FILTER and LUBE PUMP OIL FILTER :
    - remove the GEN SCAV OIL FILTER (8069KM) and LUBE PUMP OIL FILTER (8076KM) and do a check of the removed oil filter elements AMM 49-91-41-200-002.
   (1) If the oil filter element(s) is/are contaminated with:
. copper wire particles,
. nonmetallic flakes,
. phenolic resin.
     (a) If there is no contamination of the oil filter elements after 15 minutes APU operation:
     (b) If the oil filter elements are contaminated again after 15 minutes APU operation:
   (2) If the oil filter element(s) is/are contaminated with brass or silver-plated steel particles:
Subtask 49-00-81-710-189-A ** ON A/C NOT FOR ALL
B. Do the test given in Para. 3.
[Rev.8 from Aug 2018] 2026.04.04 04:34:35 UTC
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