(a)
Stop for five minutes, then do this task: "Hydraulic System B Depressurization" (AMM 27-51-00/201).
S 225-023
CAUTION: MAKE SURE THE ANGULAR CLEARANCE IS 1/4 TO 5/6 (90-300 DEGREES)
_______ TURN OR LESS. A VALUE FOR (X1) NOT IN THE LIMIT CAN CAUSE DAMAGE DURING THE FLAP OPERATION. YOU MUST KEEP THE LATERAL TRIM CORRECTIONS.
(3)
Make sure the angular clearance between the upstop on the ball screw nut and the upstop on the screw yoke is 170 to 190 degrees (1/2 turn |10 degrees) (1/4 to 5/6 [90-300 degrees] turn if you have made lateral trim corrections) (Fig. 503).
S 225-011
(4)
At the No. 4 or No. 5 jackscrew, measure and write down the dimension X1.
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A 737-300/400/500MAINTENANCE MANUAL
S 725-012
(5)
Make sure the trailing edge flaps move to the correct position:
(a)
Do this task: "Hydraulic System B Pressurization" (AMM 27-51-00/201).
(b)
Put the flap control lever in the 1-unit position to extend the trailing edge flaps.
(c)
Stop for two minutes, then measure and write down the dimension X2.
(d)
Write this dimension in Table I.
~...............................................................................
| | JACKSCREW POSITION |
| FLAP | -INCHES- |
| CONTROL ................. .... ...............................................
| LEVER | NECESSARY | MEASURED | MEASURED | MEASURED | MEASURED |
| POSITION | X2 - X1 | X2 | X2 - X1 | X2 | X2 - X1 |
| -UNITS- | | EXTEND | EXTEND | RETRACT | RETRACT |
................................................................................. | 1 | 3.90 to 5.00 | | | | | ................................................................................. | 2 | 13.45 to 14.80 | | | | | ................................................................................. | 5 | 17.84 to 19.34 | | | | | ................................................................................. | 10 | 22.49 to 23.15 | | | | | ................................................................................. | 15 | 24.11 to 24.81 | | | | | ................................................................................. | 25 | 25.26 to 25.94 | | | | | ................................................................................. | 30 | 27.12 to 27.78 | | | | | ................................................................................. | 40 | 29.82 to 30.48 | | | | | 2............…..................…...........…...........…..........…............1
TABLE I
(e)
Measure the dimension X2 with the flap control lever in the 2-, 5-, 10-, 15-, 25-, 30- and 40-unit detents (during the flaps extension).
(f)
Measure the dimension X2 with the flap control lever in the 30-, 25-, 15-, 10-, 5-, 2-, and 1-unit detents (during the flaps retraction).
(g)
Subtract the dimension X1 from the dimension X2 to get the X2 - X1 dimension.
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737-300/400/500MAINTENANCE MANUAL
(h) Make sure the X2 - X1 dimension is in the tolerance during the flaps extension and retraction.
S 715-013
(6) Do a check of the trailing edge flap operation time.
NOTE: A hydraulic service cart set to 20 gpm and 3000 psi or
____ operation of the engine driven pump is necessary to do this test.
(a)
Move the flap control lever from the UP detent to the 40-unit detent.
