72-52-00-290-004 Borescope Inspection of the High Pressure Turbine
Rotor Blade (from the front)
72-54-00-290-005 Inspection of the Stage 1-3 Blades
72-56-00-210-002 Inspection/Check of the Turbine Frame Assembly
77-00-00-710-042 Reset of the N1, N2 and EGT Max Pointers
78-30-00-081-041 Make the Thrust Reverser Serviceable after
Maintenance
78-30-00-481-041 Make the Thrust Reverser Unserviceable for
Maintenance
78-36-00-010-040 Opening of the Thrust Reverser Doors
78-36-00-410-040 Closing of the Thrust Reverser Doors
TSM 79-00-00-810-818 Incorrect Oil Quantity Level on Engine 1
TSM 77 PB 101 (for corrective action)
72-00-00-991-305 Fig. 601
72-00-00-991-306 Fig. 602
72-00-00-991-307 Fig. 603
R 72-00-00-991-323 Fig. 604 R 72-00-00-991-324 Fig. 605
3. Job Set-up
__________
Subtask 72-00-00-941-069
A. Safety Precautions
(1) On the center pedestal, on the ENG panel 115VU:
(a) Put a warning notice to tell persons not to start the engine.
(2) Make sure that the engine 1(2) shutdown occurred not less than 5 minutes before you do this procedure.
(3) On the overhead maintenance panel 50VU:
(a) Make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off.
(b) Put a warning notice to tell persons not to energize the FADEC 1(2).
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Subtask 72-00-00-010-076
B. Open the fan cowl doors (Ref. TASK 71-13-00-010-040):
FOR 1000EM1
437AL, 438AR
FOR 1000EM2
447AL, 448AR
Subtask 72-00-00-040-061
C. Make the thrust reverser unserviceable (Ref. TASK 78-30-00-481-041).
Subtask 72-00-00-010-081
D. Open the thrust reverser doors (Ref. TASK 78-36-00-010-040):
FOR 1000EM1
451AL, 452AR
FOR 1000EM2
461AL, 462AR
4. Procedure
_________
(Ref. Fig. 601/TASK 72-00-00-991-305, 602/TASK 72-00-00-991-306, 603/TASK 72-00-00-991-307)
Subtask 72-00-00-290-052
A. Checks to be Done after a Hot Start
NOTE : Starting exhaust gas temperature (EGT) (T495) limits are given.
____
(1) Area A: EGT (T495) is more than 725 deg.C but less than or equal to 750 deg.C for a period of less than 30 seconds.
R (a) Do the trouble shooting procedure to find and correct the cause R of the hot start before the subsequent flight (Ref. TSM 77 PB 101).
(b) A maximum service extension of 5 flight cycles is permitted before you must correct the problem.
(2) Area B: EGT (T495) is more than 750 deg.C but less than or equal to 800 deg.C for less than 10 seconds.
(a) Do a borescope inspection of the HPT blades and stage 1 LPT blades (borescope ports S16 and S17) (Ref. TASK 72-54-00-290-005) and (Ref. TASK 72-52-00-290-004).
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Operational EGT (T495) Limits for Ground Starting and Sub-Idle Operation
Figure 601/TASK 72-00-00-991-305
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R Operational EGT (T495) Limits Above Idle Figure 602/TASK 72-00-00-991-306
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R Oil Pressure Versus Core Speed (N2) Figure 603/TASK 72-00-00-991-307
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R R (b) Do the trouble shooting procedure to find and correct the cause of the hot start before the subsequent flight (Ref. TSM 77 PB 101).
(c) A maximum service extension of one start is permitted and, if that start is satisfactory, 1 cycle is permitted before you must correct the problem.
R R (3) Area C: Stop the start and do these checks before you try to start the engine again.
CAUTION : HPT BLADES THAT HAVE HAD ENGINE EGT MORE THAN 990 DEG.C_______ (1814 DEG.F) CANNOT BE REPAIRED. THE ENGINE MUST BE REMOVED AND RETURNED TO SHOP FACILITY TO EXAMINE FOR DAMAGE.
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