Changes in all Parameter Values on Engine 2

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1. Possible Causes
· P2/T2 Probe Heater
· SENSOR-P2/T2 ( 4014KS )
· P2/T2 Air Tubes
· P4.9 (P5) Sensor and Manifold (2004EM1, 2004EM2, 2004EM3)
· P4.9 (P5) Pressure Rake Tube
· P4.9 (P5) Pressure Tube
· FMU ( 4000KC )
· EEC ( 4000KS )
· Stage 7 and Stage 10 HPC Bleed Valves
· Stage 7 and Stage 10 HPV Solenoid Valves
2 Job Set-up Information
A. Referenced Information
REFERENCE DESIGNATION
Ref. AMM 31-32-00-860-012 Procedure to Get Access to the SYSTEM REPORT/TEST/ENG Page
Ref. AMM 73-22-11-710-040 Operational Test of the P2/T2 Probe Heater
Ref. AMM 73-22-34-000-010 Removal of the Electronic Engine Control (EEC)
Ref. AMM 73-22-34-400-010 Installation of the Electronic Engine Control (EEC)
Ref. AMM 73-22-48-200-010 General Check of the P2/T2 Air Tubes
Ref. AMM 73-22-51-700-801 Functional Test of the P4.9 (P5) Sensor System
Ref. AMM 73-22-52-000-010 Removal of the Fuel Metering Unit (FMU)
Ref. AMM 73-22-52-400-010 Installation of the Fuel Metering Unit (FMU)
Ref. AMM 75-32-51-700-010 Functional Test of the HPC Stage 7 Solenoid Valve with Test Set
IAE2R19437
Ref. AMM 75-32-52-700-011 Functional Test of the HPC Stage 7 Bleed Valve with Test Set
IAE2R19437
Ref. AMM 75-32-53-700-010 Functional Test of the HPC Stage 10 Solenoid Valve with Test Set
IAE2R19437
Ref. AMM 75-32-54-700-011 Functional Test of the HPC Stage 10 Bleed Valve with Test Set
IAE2R19437
3. Fault Confirmation
Subtask 77-00-00-710-162-A
A. Test
Not applicable.
4. Fault Isolation
Subtask 77-00-00-810-129-A
A. If the fault symptom is identified by the crew observation: ENG2 - Changes in all parameter values:
(1) Read the LAST LEG REPORT (Ref. 70-00-00 Page Block 301 Task Supporting Data) and
the scheduled maintenance report of the FADEC (1A and 1B) menu on the MCDU Ref.
AMM 31-32-00-860-012 .
(a) If you find messages related to:
1 EPR measurement (P2, P4.9 (P5))
2 Speed indication (N1, N2)
3 Fuel and control system (FMU, EEC)
4 VSV system
5 Handling bleed system (2.5 bleed, HBV Stage 7 and Stage 10), or
6 Customer bleed system (PRV, HPV)
· Do the applicable troubleshooting procedures in accordance with TSM for maintenance
message(s) recorded.
(b) If you do not find messages, as stated above, continue with step 1_ below:
1 Do an operational test of the P2/T2 Probe Heater Ref. AMM 73-22-11-710-040 .
2 Examine the SENSOR-P2/T2 ( 4014KS ) for signs of damage, contamination and/or broken
parts.
3 Check the P2/T2 Air Tubes Ref. AMM 73-22-48-200-010 .
4 Examine the P4.9 (P5) Sensor and Manifold (2004EM1, 2004EM2, 2004EM3) and P4.9
(P5) Pressure Rake Tube for signs of damage, contamination and/or broken parts.
5 Check the P4.9 (P5) Pressure Tube for leaks, damage and water contamination Ref.
AMM 73-22-51-700-801 .
(c) If the fault continues:
· Replace the FMU ( 4000KC ) Ref. AMM 73-22-52-000-010 and Ref.
AMM 73-22-52-400-010 .
(d) If the fault continues:
· Replace the EEC ( 4000KS ) Ref. AMM 73-22-34-000-010 and Ref.
AMM 73-22-34-400-010 .
(e) If the fault continues:
· Do a functional test of the Stage 7 and Stage 10 HPC Bleed Valves Ref.
AMM 75-32-52-700-011 and Ref. AMM 75-32-54-700-011 and Stage 7 and Stage 10 HPV
Solenoid Valves Ref. AMM 75-32-51-700-010 and Ref. AMM 75-32-53-700-010 . [Rev.6 from Feb 2017] 2026.04.04 04:37:49 UTC