(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 74-21-20-865-058
B. Open, safety and tag this(these) circuit breaker(s):
-------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------49VU ENGINE/1 AND 2/IGN/SYS A 1JH A03
FOR 1000EM1 121VU ENGINE/IGN/ENG1/SYS B 3JH1 P41 121VU ENGINE/IGN/ENG1/SYS A BAT 2JH1 P39
FOR 1000EM2 121VU ENGINE/IGN/ENG2/SYS B 3JH2 P42 121VU ENGINE/IGN/ENG2/SYS A BAT 2JH2 P40
Subtask 74-21-20-010-056
C. Open the fan cowl doors: (Ref. TASK 71-13-00-010-040)
FOR 1000EM1
437AL, 438AR
FOR 1000EM2
447AL, 448AR
Subtask 74-21-20-040-053
D. Make the thrust reverser unserviceable (Ref. TASK 78-30-00-481-041).
Subtask 74-21-20-010-057
E. 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 74-21-20-991-302)
R Subtask 74-21-20-020-059
R A. Disconnect the left ignition lead connector (Ref. TASK 74-21-20-000-002).
R Subtask 74-21-20-100-051
R B. Clean the ceramic insulator and contact with lint free cloth is moist R with 1,1,1 trichorethane (Material No. CP1011) or Stoddart Solvent.
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Inspection of the Left Ignition Lead
Figure 601/TASK 74-21-20-991-302
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C. Inspection of Left Ignition Lead:
-------------------------------------------------------------------------------INSPECT/CHECK MAXIMUM REMARKS SERVICEABLE LIMITS -------------------------------------------------------------------------------
R R R 1. Type 3 and 4 exciter connector for : - Carbon tracks.
- Thread damage.
2. Type 3 igniter plug connector for: - Burned or pitted contact.
- Cracked or chipped ceramic insulator.
- Thread damage.
3. Type 4 Igniter plug connector for:
Not serviceable. Replace lead (Ref. TASK 74-21-20-000-002) and (Ref. TASK 74-21-20-400-002).
30 percent of lead-in thread or 10 percent on each of 2 lead-in threads may be missing after chasing. Chase threads or replacelead (Ref. TASK 74-21-20-000-002) and (Ref. TASK74-21-20-400-002)
Not serviceable. Replace lead (Ref. TASK74-21-20-000-002) and (Ref. TASK 74-21-20-400-002).
Not serviceable. Replace lead (Ref. TASK74-21-20-000-002) and (Ref. TASK 74-21-20-400-002).
30 percent of lead-in thread or 10 percent on each of 2 lead-in threads may be missing. Chase threads or replacelead (Ref. TASK 74-21-20-000-002) and (Ref. TASK74-21-20-400-002).
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-------------------------------------------------------------------------------INSPECT/CHECK MAXIMUM REMARKS SERVICEABLE LIMITS -------------------------------------------------------------------------------
R CAUTION : DO NOT PULL_______
R ON CONTACT
R AND CERAMIC
R INSULATOR
R TO INSPECT
R THE LEAD
R WIRE. THIS
R CAN CRACK
R THE
R SILICONE
R INSULATION
R OF THE WIRE
R CREATING AN
R ARC PATH TO
R THE
R INTERNAL
R SPRING
R RESULTING
R IN LEAD
R FAILURE.
R - Eroded or pitted Not serviceable.
R contact.
R - Arcing or burning Not serviceable.
R on contact or
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