DOC AIRBUS | TSM A320FUnusual Fuel Consumption Increase due to Pressure Seal Deterioration
1. Possible Causes
ยท pressure seal
2 Job Set-up Information
A. Referenced Information
REFERENCE DESIGNATION
Ref. AMM 78-10-00-200-010 General Visual Inspection of the Exhaust System Fire Seals
Ref. AMM 78-11-11-200-010 Visually Examine the Outer Duct Seals of the Common Nozzle Assembly
Ref. AMM 78-11-11-200-011 Visually Examine the Inner Annulus Seals and Retainers of the Common
Nozzle Assembly
Ref. AMM 78-32-46-200-010 Visually Examine the Seal of the left Translating Cowl Without Component
Removal
Ref. AMM 78-32-49-200-010 Visually Examine the Hinge Access Panel Seal and Retainer of the
Left C-Duct Fixed Structure without Component Removal
Ref. AMM 78-32-49-200-011 Visually Examine the Seals and Retainers of the Lower Track of the
Left C-Duct Fixed Structure without Component Removal
Ref. AMM 78-32-49-200-013 Visually Examine the Pressure Seals of the Left Thrust Reverser
Ref. AMM 78-32-49-200-014 Visually Examine the Plug Seal of the Left C-Duct Fixed Structure
without Component Removal
Ref. AMM 78-32-76-200-010 Visually Examine the Seals and Retainer of the Right Translating Cowl
Without Componnent Removal
Ref. AMM 78-32-79-200-010 Visually Examine the Hinge Access Panel Seal and Retainer of the
Right C-Duct Fixed Structure without Component Removal
Ref. AMM 78-32-79-200-011 Visually Examine the Seals and Retainers of the Lower Track of the
Right C-Duct Fixed Structure without Component Removal
Ref. AMM 78-32-79-200-012 Visually Examine the Pressure Seals of the Right Thrust Reverser
Ref. AMM 78-32-79-200-013 Visually Examine the Plug Seal of the right C-Duct Fixed Structure
without Component Removal
3. Fault Confirmation
Subtask 78-30-00-710-289-A
A. Not Applicable
This procedure gives a comprehensive suite of checks for the deterioration of the pressure seals on the
thrust reverser and common nozzle assembly. It should be done to prevent/minimize engine performance
losses.
4. Fault Isolation
Subtask 78-30-00-810-190-A
A. Do the Aircraft Maintenance Manuel (AMM) tasks that follow to check for pressure seal deterioration and
engine performance. Make sure that all job-set up tasks are completed per each AMM task instruction
before you start the inspection.
(1) Thrust Reverser (T/R) AMM checks:
(a) Inspect the inner c-duct fire seal per Ref. AMM 78-10-00-200-010 .
(b) Visually examine the seals of the translating cowls per Ref. AMM 78-32-46-200-010 and Ref.
AMM 78-32-76-200-010 .
(c) Visually examine the hinge access panel seals and retainers of the c-duct fixed structure per Ref.
AMM 78-32-49-200-010 and Ref. AMM 78-32-79-200-010 .
(d) Visually examine the seals and retainers of the lower tracks of the c-duct fixed structures per Ref.
AMM 78-32-49-200-011 and Ref. AMM 78-32-79-200-011 .
(e) Visually examine the pressure seals of the thrust reverser halves per Ref.
AMM 78-32-49-200-013 and Ref. AMM 78-32-79-200-012 .
(f) Visually examine the plug seals of the c-duct fixed structures per Ref. AMM 78-32-49-200-014
and Ref. AMM 78-32-79-200-013 .
(2) Common nozzle assembly AMM checks:
(a) Perform a general visual inspection of the exhaust system fire seals per Ref.
AMM 78-10-00-200-010 .
(b) Visually examine the outer duct seals of the common nozzle assembly per Ref.
AMM 78-11-11-200-010 .
(c) Visually examine the inner annulus seals and retainers of the common nozzle assembly per Ref.
AMM 78-11-11-200-011 .
Figure 78(IAE)-30-00-991-02400-13-A- / SHEET 1/1 - Thrust Reverser Hydraulic Control Unit (Engine 2, Channel
A)
Figure 78(IAE)-30-00-991-02300-13-A- / SHEET 1/1 - Thrust Reverser Hydraulic Control Unit (Engine 1, Channel
A)
Figure 78(IAE)-30-00-991-02500-13-A- / SHEET 1/1 - Failure of the Thrust Reverser Actuator LVDT on Engine 2,
Channel A
Figure 78(IAE)-30-00-991-00100-13-A- / SHEET 1/1 - Left Thrust Reverser Lock Indicator/Proximity Sensor
Figure 78(IAE)-30-00-991-00200-13-A- / SHEET 1/1 - Right Thrust Reverser Lock Indicator/Proximity Sensor
Figure 78(IAE)-30-00-991-00300-13-A- / SHEET 1/1 - Failure of the Thrust Reverser Actuator LVDT on Engine 1,
Channel A
Figure 78(IAE)-30-00-991-00400-13-A- / SHEET 1/1 - Failure of the Thrust Reverser Actuator LVDT (Channel B)
on Engine 1
Figure 78(IAE)-30-00-991-02600-13-A- / SHEET 1/1 - Failure of the Thrust Reverser Actuator LVDT (Channel B)
on Engine 2
Figure 78(IAE)-30-00-991-00500-13-A- / SHEET 1/1 - Thrust Reverser (Engine 1)
Figure 78(IAE)-30-00-991-00600-13-A- / SHEET 1/1 - Thrust Reverser (Engine 2)
Figure 78(IAE)-30-00-991-00700-13-A- / SHEET 1/1 - Thrust Reverser HCU (Engine 1, Channel A)
Figure 78(IAE)-30-00-991-00800-13-B- / SHEET 1/1 - Thrust Reverser HCU (Engine 1, Channel B)
Figure 78(IAE)-30-00-991-00900-13-A- / SHEET 1/1 - Thrust Reverser HCU (Engine 2, Channel A)
Figure 78(IAE)-30-00-991-01000-13-B- / SHEET 1/1 - Thrust Reverser HCU (Engine 2, Channel B)
Figure 78(IAE)-30-00-991-01100-13-A- / SHEET 1/1 - Thrust Reverser HCU - Engine 1, Channel A
Figure 78(IAE)-30-00-991-01200-13-A- / SHEET 1/1 - Thrust Reverser HCU - Engine 1, Channel B
Figure 78(IAE)-30-00-991-01300-13-A- / SHEET 1/1 - Thrust Reverser HCU - Engine 2, Channel A
Figure 78(IAE)-30-00-991-01400-13-A- / SHEET 1/1 - Thrust Reverser HCU - Engine 2, Channel B
Figure 78(IAE)-30-00-991-01500-13-A- / SHEET 1/1 - Thrust Reverser Control - Engine 1, Channel A
Figure 78(IAE)-30-00-991-01600-13-A- / SHEET 1/1 - Thrust Reverser Contro1 - Engine 2, Channel A
Figure 78(IAE)-30-00-991-01700-13-A- / SHEET 1/1 - Thrust Reverser Control - Engine 1, Channel B
Figure 78(IAE)-30-00-991-01800-13-A- / SHEET 1/1 - Thrust Reverser Control - Engine 2, Channel B
Figure 78(IAE)-30-00-991-01900-13-A- / SHEET 1/1 - Thrust Reverser - Engine 1
Figure 78(IAE)-30-00-991-02000-13-A- / SHEET 1/1 - Thrust Reverser - Engine 2
78-31 - (IAE) - THRUST REVERSER CONTROL AND INDICATING
78-31-00 - (IAE) - THRUST REVERSER CONTROL AND INDICATING
78-31-00 PB 201 CONF 13 - THRUST REVERSER CONTROL
AND INDICATING - FAULT ISOLATION PROCEDURES [Rev.6 from Feb 2017] 2026.04.04 04:38:11 UTC