F EEFF : ALL E E ECES Dry Motoring Check Minimum Idle Check Engine Shutdown Leak Check of the Fuel Nozzles Installation of the High Pressure Turbine Clearance Control (HPTCC) SensorRemoval of the Engine Interface Unit (EIU)Installation of the Engine Interface Unit (EIU)Removal of the Nacelle Temperature SensorInstallation of the Nacelle Temperature Sensor Inspection/Check of the T495 Thermocouple Wiring Harness Installation of the Compressor Discharge Temperature (T3) Sensor Opening of the Thrust Reverser Doors Closing of the Thrust Reverser Doors
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3. Fault Confirmation
__________________
A. Test
R (1) Not applicable.
R NOTE : The following trouble shooting procedure must be completed at
____ R first opportunity not interfering with revenue service R operation within subsequent 10 days or 150 flight hours of R operation that follow the first exceedance of nacelle R temperature above 240 deg.C (464 deg.F) pending there is no R ECAM warning related to ENG1 FIRE LOOP A (B) FAULT.
4. Fault Isolation
_______________
R A. Do the following checks:
R NOTE : The maintenance message CHECK HOT AIR LEAKS ENG1 is generated and
____ R the advisory for nacelle temperature is flashing green on the R upper ECAM if the air temperature at the top of the core R compartment area is higher than 240 deg.C (464 deg.F).
R (1) Open both reverser cowls (Ref. AMM TASK 78-36-00-010-040).
R (2) Do a check for hot air leaks from the ECS:
R - make sure that the engine bleed ducts are in the correct condition
R and correctly installed (ECS and engine bleed ducts and pneumatic
R valves). Pay particular attention to clamp installation.
R (3) Do a check for evidence of overheat on the inner wall of both
R reverser cowls. If hot spots are visible, do a check for leaks in the
R area next to the spot.
R (4) Do a check for excessive presence of black deposit streaks on the hot
R section of the engine. If black streaks are visible, do a check for
R leaks in the area next to the spot.
R (5) Make sure that the 12 o'clock EGT probe deflector is correctly
R installed.
R NOTE : The purpose of this deflector is to avoid EGT probe hot air
____ R impingement onto the nacelle temperature sensor.
R (6) Do a check of the cooling holes in the inner wall of the reverser R cowls for blockage.
R (7) Do a check for proper installation of all engine and bleed valves R located in the core compartment.
R (8) Do a visual check for cracks in the combustor casing, HP compressor R casing and turbine casing.
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R (9) Do a visual inspection of the nacelle temperature sensor and wiring
R for any signs of external damage. Do a check on connectors of the
R nacelle temperature sensor (13KS1) and associated harness for
R contamination/corrosion and for damaged pins. Clean repair wiring or
R replace the sensor as required (Ref. AMM TASK 75-41-15-000-041) and
R (Ref. AMM TASK 75-41-15-400-041).
R (10) If nothing is found:
R - do a check for correct installation and sealing of the EGT probes
R (Ref. AMM TASK 77-21-10-200-002).
R (11) Do a check for correct installation and sealing of the TCC sensor(s)
R (Ref. AMM TASK 73-21-70-400-001):
R - replace the gasket seal if suspect.
R (12) Do a check for correct torquing and sealing of the borescope plugs
R located on the HP compressor, HP and LP turbines and combustor case.
R (13) Do a check for correct installation and sealing of the T3 sensor on
R the combustor case (Ref. AMM TASK 77-23-10-400-002):
R - replace the gasket seal if suspect.
R (14) Do a check for correct torquing and sealing of the 2 LPT pipes fitted
R at 11:30 and 2:30 on the HPT case:
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