(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.
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(b) Put a warning notice to tell persons not to energize the FADEC 1(2).
Subtask 71-13-11-010-052
B. Open the fan cowl doors (Ref. TASK 71-13-00-010-040):
FOR 1000EM1
437AL, 438AR
FOR 1000EM2
447AL, 448AR
4. Procedure
_________
(Ref. Fig. 602/TASK 71-13-11-991-302)
Subtask 71-13-11-210-052
A. Do a functional check of the pressure relief door as follows:
(1) Calculate the torque wrench force required to open the latch with the formula shown below:
0.53P X L/(L + 1.5) where:
- P = Latch release load
- L = Torque wrench effective length
NOTE : The torque wrench effective length is the distance between the
____ point of application of force (where the hand is placed on the torque wrench handle) and the center line of the torque wrench
0.375 drive.
The latch release loads for the fan cowl pressure relief door are
between 98 lbf (43.59 daN) and 118 lbf (52.49 daN).
Example:
- Latch release load = 98 lbf. (P = 98)
- Torque wrench effective length = 12 in. (L = 12) Calculated as:
(12) 51.94 X 12
0.53 X 98 --------= ---------- = 46.168888
12 + 1.5 13.5 The results (46.168888) can be rounded to 46.2 lbf. The torque shown on the torque wrench when the latch releases, with a 12 in. effective length, should be 46 lbf.in (0.52 m.daN) to 56 lbf.in
(0.63 m.daN) .
(2) Install the TORQUE ADAPTER TOOL (RSE1234) on the torque wrench.
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Pressure Relief Door
Figure 602/TASK 71-13-11-991-302
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(3) Put the torque wrench in the latch release slot.
(4) Measure the effective length of the torque wrench handle and put the hand at that position. Hold the handle with the thumb and the forefinger.
(5) Slowly apply force to the torque wrench. Make sure that the force is applied at a 90 degree angle to the torque wrench handle.
(6) When the latch starts to move write down the force shown on the torque wrench.
(7) Make sure that the torque wrench force indication is within the range of values calculated in procedural step 3.A.(1).
(8) If the force required to open the latch is above or below the calculated limits, replace the door latch.
5. Close-up
________
Subtask 71-13-11-410-052
A. Close Access
(1) Make sure that the work area is clean and clear of tool(s) and other items.
(2) Close the fan cowl doors (Ref. TASK 71-13-00-410-040):
FOR 1000EM1
437AL, 438AR
FOR 1000EM2
447AL, 448AR
(3) Remove the warning notice(s).
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ROD - FAN COWL DOOR HOLD OPEN - REMOVAL/INSTALLATION
____________________________________________________ TASK 71-13-12-000-041 Removal of the Hold-open Rod of the Fan Cowl Door
1. Reason for the Job
__________________
Self Explanatory
2. Job Set-up Information
______________________
A. Fixtures, Tools, Test and Support Equipment
-------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
No specific warning notice No specific access platform 0.5 m (1 ft. 8 in.) RSE1113 1 SLING - FAN COWL
B. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
71-13-00-010-040 Opening of the Fan Cowl Doors 71-13-12-991-300 Fig. 401 71-13-12-991-301 Fig. 402
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