(b)  
Position flap control lever to FLAP UP detent position to retract flaps and slats.

(c)  
Depressurize hydraulic system A. Refer to 27-81-0.

WARNING:  ALL ADJUSTMENTS WILL BE ACCOMPLISHED WITH HYDRAULIC SYSTEM DEPRESSURIZED TO PREVENT INJURY TO PERSONNEL OR COMPONENT DAMAGE.

(d)  
Check that slat trailing edge upper and lower gaps are as shown in section B-B, figure 504. If not, adjust upstops to obtain proper gap.(See section A-A.) After obtaining correct upper and lower gaps, back off center upstop one serration from contract with the slat fitting.

(e)  
Check that slat trailing edge lower surface mismatch is as shown in section B-B.

NOTE: Mismatch refers to a step in either direction.

(f)  
If mismatch exceeds limits specified, extend slat, loosen main slat track adjustment bolts and reposition serrated washers. Make sure that serrations are properly aligned then tighten bolts to 60-85 pound-inches. Install cotter pins.

WARNING:  INSTALL LEADING EDGE SLAT ACTUATOR LOCKS AS REQUIRED WHEN ADJUSTING SLATS TO PREVENT INJURY TO PERSONNEL.

(g)
Check that slat trailing edge upper surface mismatch is as shown in section B-B.

NOTE: Mismatch refers to a step in either direction.

(h)  
If mismatch exceeds limits specified, adjust aft end of auxiliary tracks by loosening aft adjustment bolts and positioning track vertically. Ensure that serrations are properly aligned, then tighten bolts to 45-65 pound-inches. Install cotter pin.

(i)  
Bend tabs at main tracks(if required) to fair tabs with wing structure.

531 
27-81-0 Page 512  BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.  Feb 15/73 

G42110 G42179
531  Leading Edge Slat Adjustment 
Feb 15/73  Figure 504 (Sheet 1)  27-81-0 
Page 513 
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 

Leading Edge Slat Adjustment  531 
27-81-0  Figure 504 (Sheet 2)  Jun 20/83 
Page 514 
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 

(j)  
Lower slats to intermediate position.

(k)  
Check that slat trailing edge gap is as shown in section C-C. If gap exceeds limits specified, adjust by loosening forward auxiliary track adjustment bolt and adjusting track as required. Ensure that serrations are properly aligned, then tighten bolt 45 to 65 pound-inches. Install cotter pin.

NOTE:  Maintain track roller to detent arm clearance shown in section C-C when measuring trailing edge gap.

(l)  
If track roller to detent arm clearance shown in section C-C cannot be met while adjusting trailing edge gap, loosen both forward and aft adjustment bolts on track and position track as required. Ensure that serrations are properly aligned, then tighten bolts 45 to 65 pound-inches. Install cotter pins.

(m)  
Provide system A hydraulic power (Ref 27-81-0).

(n)  
Position flap control lever in FLAP UP detent to retract flaps.

(o)  
Recheck slat trailing edge upper surface mismatch per section B-B if adjustments were made to obtain required track roller to detent arm clearance. If mismatch exceeds limits specified, adjust aft end of auxiliary tracks by loosening aft adjustment bolt and positioning track vertically. Ensure that serrations are properly aligned, then tighten bolt 45 to 65 pound-inches. Install cotter pin.

(p)  
Extend slats fully.

(q)  
Depressurize hydraulic system A (Ref 27-81-0).

(r) Check as follows: 1) Check that trailing edge gap is as shown in Fig. 506. If gaps are not within limits, adjust auxiliary slat tracks per steps (k) and (l) as required to satisfy gap requirements in intermediate and full extended positions.
2)  Check that distance from top of detent arm ramp to track lower surface is 0.72 +0.13/-0.08 inch. If not, reposition upstop (Fig. 505). Ensure that bottom of detent is above lower surface of track after stop is repositioned.
(s)  At each detent arm, pull arm down until top of ramp is even with track lower surface (within 0.03 inch). Apply force at detent of detent arm. Check that force required to deflect each detent arm is 70 to 85 pounds and that forces at both arms are equal within 3 pounds. Adjust detent arm torque adjustment bolt as required to adjust forces. Lockwire bolt.
531 
Jun 20/85  BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.  27-81-0 Page 515 

G42236T52502

Slat Detent Arm Adjustment  531 
27-81-0  Figure 505  Oct 20/86 
Page 516 
　
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