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71-00-00-991-309 Fig. 506
3. Job Set-up
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Subtask 71-00-00-010-062
A. Open the fan cowl doors (Ref. TASK 71-13-00-010-040):
FOR 1000EM1
437AL, 438AR
FOR 1000EM2
447AL, 448AR.
Subtask 71-00-00-869-107
B. Preparation for Test
(1) Obey the wind limitations during Engine Ground Operations (Ref. TASK 71-00-00-869-003).
(2) Make sure that the engine inlet and exhaust covers have been removed. Make sure that these areas are clear of any foreign objects.
(3) Make a visual check of the temperature sensors, fan inlet, and exhaust areas. If snow or ice has collected in the fan duct, make sure that the fan turns freely. Also, make sure that the engine inlet, inlet lip, fan, spinner, and fan exhaust duct are clear of ice or snow. If the fan does not turn freely, melt the ice or snow with hot air before an engine operation.
(4) Look at the general condition of the fan spinner and fan blades, core exhaust nozzle, LPT and external surfaces of the cowls.
(5) Check oil quantity. Make a check of the drain ports for fuel, oil and hydraulic leaks. Also make sure that fuel drained from the engine does not cause a fire.
Subtask 71-00-00-861-062
C. Energize the aircraft electrical circuits (Ref. TASK 24-41-00-861-002).
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Subtask 71-00-00-869-103
D. Do the EIS start procedure (upper ECAM display unit only) (Ref. TASK 31-60-00-860-001).
Subtask 71-00-00-710-079
E. Start the engine (Ref. TASK 71-00-00-710-003).
4. Procedure
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Subtask 71-00-00-710-080
A. Do this procedure:
(1) Let the engine become stable at minimum idle for 3 minutes and make sure that the parameters below are in the limits:
- N2 speed must not be below 58.3 percent
(a) If N2 is below 58.3 percent, do the trouble shooting procedure (Ref. TSM 77 PB 101).
- Oil pressure (Ref. Fig. 506/TASK 71-00-00-991-309)
(2) Make a visual inspection of the fuel and pneumatic lines, fittings and accessories for leaks. For oil leakage, staining or wetting from/on the oil system tubes, hoses and components (Ref. TASK 79-00-00-210-003).
(3) Safety precaution :
WARNING : DO NOT LET THE HMU TEMPERATURE EXCEED 100 DEG.C (212
_______
DEG.F).
NOTE : Hydromechanical Units (HMUs) that have fluorocarbon (Viton)
____ external seals (SB 73-015) can leak fuel for a short time when they are below 0 deg.C (32.00 deg.F) (Modification 1 and 2)
R (Ref. TASK 71-00-00-790-002). If the ambient temperature is below -40 deg.C (-40.00 deg.F) it is recommended to heat the HMU (modification 1 and 2) to minimize leakage during starts per the following procedure :
(a) Heat the HMU housing with a suitable hot air blower (Keco GH100, Aerotech BT400-45 or equivalent) operating at 140 deg.C (284.00 deg.F) until the HMU housing temperature is greater than 25 deg.C
(77.00 deg.F).
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Oil Pressure Versus Engine Core Speed Figure 506/TASK 71-00-00-991-309
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NOTE : The HMU should be warm to the touch but not hot.
____
- If the fuel leakage stops in less than 5 minutes at idle, continue operation of the engine.
- If the fuel leakage continues after 5 minutes at idle, shut down the engine and repair the source of the leakage.
(4) Stop the engine (Ref. TASK 71-00-00-710-028).
(5) Do the EIS stop procedure (Ref. TASK 31-60-00-860-002)
Subtask 71-00-00-040-057
B. Make the thrust reverser unserviceable (Ref. TASK 78-30-00-481-041).
Subtask 71-00-00-010-063
C. Open the thrust-reverser doors (Ref. TASK 78-36-00-010-040) to do a visual inspection for fuel and oil leaks: FOR 1000EM1 451AL, 452AR FOR 1000EM2 461AL, 462AR
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