W DOC AIRBUS | TSM A320F

N1 Rotor does not Turn during the Start of the Engine 1 or 2

TASK 80-00-00-810-837-A
N1 Rotor does not Turn during the Start of the Engine 1 or 2

1. Possible Causes

2. Job Set-up Information
 A. Referenced Information
REFERENCE
DESIGNATION
AMM 71-00-00-710-003
Engine Automatic Start
AMM 72-21-00-210-001
Inspection/Check of the Spinner Cone
AMM 72-21-00-210-006
Inspection of Fan Rotor Blades Removed from the Fan Disk.
AMM 72-23-00-210-003
Detailed Inspection of Engine Inlet, Fan Blades, Fan Outlet and Abradable Material
AMM 79-21-10-210-004
Check the Forward Sump Scavenge Magnetic Plug and Screen
3. Fault Confirmation
Subtask 80-00-00-710-125-A ** ON A/C NOT FOR ALL
A. Test
   (1) Not applicable, the fault is evident.
4. Fault Isolation
Subtask 80-00-00-810-100-A ** ON A/C NOT FOR ALL
A. If the fault symptom is identified by the crew observation : ENG1/2 STARTING-N1 rotor does not turn during the start:
  • do an inspection of the engine inlet and exhaust areas for damage.
   (1) If the fault continues:
  • do a check to make sure that there is no sign of interference/binding between the fan blade and the fan case abradable.
     (a) If yes:
  • release the caught blade(s). To do this, use your hand force to move the blade tip(s) forward and circumferentially
  • do a check of the fan blade(s) AMM 72-21-00-210-001
  • do a check of the abradable shroud AMM 72-23-00-210-003.
   (2) If the fault continues:
  • try to manually turn the N1 rotor.
     (a) If it is not possible to turn the N1 rotor:
  • stop 30 minutes before you try to manually turn again the rotor.
   (3) If the fault continues:
Subtask 80-00-00-810-100-B ** ON A/C NOT FOR ALL
A. If the fault symptom is identified by the crew observation : ENG1/2 STARTING-N1 rotor does not turn during the start:
  • do an inspection of the engine inlet and exhaust areas for damage.
   (1) If the fault continues:
  • do a check to make sure that there is no sign of interference/binding between the fan blade and the fan case abradable.
     (a) If yes:
  • release the caught blade(s). To do this, use your hand force to move the blade tip(s) forward and circumferentially
  • do a check of the fan blade(s) AMM 72-21-00-210-006
  • do a check of the abradable shroud AMM 72-23-00-210-003.
   (2) If the fault continues:
  • try to manually turn the N1 rotor.
     (a) If it is not possible to turn the N1 rotor:
  • stop 30 minutes before you try to manually turn again the rotor.
   (3) If the fault continues:
  • do a check of the magnetic chip detectors for unwanted particles .
Subtask 80-00-00-710-126-A ** ON A/C NOT FOR ALL
B. Do an engine automatic start procedure AMM 71-00-00-710-003.
[Rev.8 from Aug 2018] 2026.04.04 04:38:38 UTC
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