(2) TORQUE the nuts (5) and (45) to between 50 and 70 lbf.in (0.56 and
0.79 m.daN).
(3) With no shims (15) installed, close the fan cowl doors and engage the latches. (3 locations).
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E. Adjustment of the Fan Cowl Doors
(1) Adjust the fan cowl door latches one at a time.
(a) Turn the nut in the keeper assembly, on the right fan cowl, with a 5/32 inch (4 mm) hex wrench.
(b) Each 45 deg. turn of the nut will cause the clevis to extend or retract 0.005 inch (0.127 mm).
(c) Adjust the latches so that a force of 15 to 25 lbf (6.8 to 11.34 Kgs.) is required to close the latch.
(d) Measure the force required to close the latch. Put the push-pull gage at the end of the latch handle to measure the force.
(2) Measure the distance between the fan cowl doors at the latch interfaces. Two locations on each latch.
(3) Measure the distance between the retainer (20) and the keeper housing.
(4) Measure the distance between the retainer (35) and the keeper housing.
(5) Make a note of the 6 measurements, two at each latch. NOTE : The distance between the doors may get smaller from the front
____ to rear if the distance is within the specified range.
Subtask 71-13-00-010-052
F. Get Access CAUTION : USE YOUR HANDS TO OPEN THE FAN COWL LATCHES. IF YOU USE A TOOL
_______
TO OPEN THE LATCH YOU CAN DAMAGE THE LATCH.
(1) Open the fan cowl doors: (Ref. TASK 71-13-00-010-040)
FOR 1000EM1
437AL, 438AR
FOR 1000EM2
447AL, 448AR
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Subtask 71-13-00-420-051
G. Install the new shims (15), two locations, on each latch, as follows :
(1) Remove the laminations from the new shims (15), as required to get the distance measurement for each latch that was recorded in step E.(3) and E.(4).
NOTE : If too many laminations are removed get a new shim (15) and do
____
step (1) again.
(2) Attach the shims (15) and the retainers (20) and (35) with the bolts (25), the pins (30), the nuts (5) and (45), and the washers (10) and (40).
(3) TORQUE the nuts (5) and (45) to between 50 and 70 lbf.in (0.56 and
0.79 m.daN)
Subtask 71-13-00-410-051
H. Close Access
CAUTION : USE YOUR HANDS TO CLOSE THE FAN COWL LATCHES. IF YOU USE YOUR
_______ FOOT OR A TOOL TO CLOSE THE LATCH YOU CAN DAMAGE THE LATCH.
(1) Close the fan cowl doors: (Ref. TASK 71-13-00-410-040) FOR 1000EM1 437AL, 438AR FOR 1000EM2 447AL, 448AR
Subtask 71-13-00-820-053
J. Adjustment of the Latch Tension of the Fan Cowl Doors R (Ref. Fig. 501/TASK 71-13-00-991-301, 502/TASK 71-13-00-991-303)
NOTE : The permitted in-service latch handle force limits are 40 to 50
____
Lbs (18.2 to 22.7 kgs).
(1) Open the forward latch. Make sure the other latches are engaged.
(2) Adjust the forward fan cowl latch, as follows:
(a) Turn the nut in the keeper assembly, on the right fan cowl, with a 5/32 inch (4 mm) hex wrench.
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(b) Each 45 deg. turn of the nut will cause the clevis to extend or retract 0.005 inch (0.127 mm).
(c) Adjust the latches so that a force between 40 and 50 Lbs (18.2 and 22.7 mdaN) is required to close the latch.
NOTE : When you adjust a latch, make sure the other two latches
____
are engaged.
(d) Measure the force required to close the latch. Put the push-pull gage at the end of the latch handle to measure the force.
(e) Make sure that the shim retainers (20) and (35) fully touch the keeper housing.
(3) Do step (2) again for the center and aft fan cowl door latches.
R (4) Measure the step mismatch of the fan cowl left and right door at the R three latch areas with the doors closed (Ref. Fig. 501/TASK 71-13-00-991-301, Detail D.)
(a) The maximum step mismatch permitted between the left and right fan cowl at the three latch areas is plus or minus 0.080 in.
(2.03 mm).
(5) Measure the step mismatch of the fan cowl doors along their full length (from leading to trailing edges). (Ref. Fig. 501/TASK 71-13-00-991-301, Detail F.)
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