(4)
Actuate safety latches to latched position and install quick-release pins.
(5)
If no further maintenance is to be performed requiring removable cowl panels to be open, close left and right cowl panels.
C. Tension Latches Adjustment
(1)
If cowl panels are open, close and latch left and right removable cowl panels.
(2)
Open one latch and check force required to close latch. Latch should close with a force of 20 (+ 5) pounds applied to latch handle with adjacent latches closed.
CAUTION: DO NOT USE TOOLS WHEN CLOSING COWL PANEL LATCHES. USE HAND PRESSURE ONLY.
(3)
If closing force is not within specified limits, adjust U-bolt as follows:
(a)
Loosen checknuts as necessary to provide adjustment clearance. (See figure 501.)
(b)
Equally adjust self-locking nuts (counterclockwise to lower closing force or clockwise to raise closing force) as required to obtain closing force within limits.
(c)
Secure adjustment by tightening checknuts.
(4)
Repeat steps (2) through (3) for each cowl panel tension latch. Ensure adjacent latches are closed when checking closing force of each latch.
(5)
Ensure left and right removable cowl panels are closed and latched.
527
Aug 15/71 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 71-11-11 Page 501
Removable Cowl Panel Adjustment 553
71-11-11 Figure 501 (Sheet 1) May 1/75
Page 502
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
D. Ground Test Lock Hook Adjustment
(1)
Open left and right removable cowl panels.
(2)
If hook is in stowed position (up), disengage from hook retainer and manually pull left cowl panel closed using a force of 5 pounds maximum. Check that seal between engine and cowl panel drain tank is compressed sufficiently to prevent leakage and that the hook pivots under spring load into locking position (down) without binding or slack.
(3)
If hook does not function as specified, adjust wear clip position as necessary within range permitted by elongated mounting holes in clip. If locking position of hook interferes with closing of left cowl panel, adjust hook retainer position as necessary, within range permitted by elongated mounting hole in hook assembly, to eliminate interference. (See figure 501.)
(4)
Deleted.
(5)
Close left and right removable cowl panels.
500 Removable Cowl Panel Adjustment
Aug 15/68 Figure 501 (Sheet 2) 71-11-11
Page 503
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
FIXED FAIRING - REMOVAL/INSTALLATION
General
A. The fixed fairing is a two-piece section of cowling which fairs with the side removable cowl panels, the nose cowl, the thrust reverser fairing, and the strut midfairing. The fixed fairing's two parts are bolted together at six points. The assembly is then secured to the engine at six points.
2. Prepare to Remove Fixed Fairing
A. Remove side removable cowl panels.
B. Remove engine-to-wing forward fairing (Ref 54-51-11/401).
C. Remove the mid-fairing doors 5154, 5126 (left engine) or 5254, 5226 (right engine)
(Ref 12-31-91/201).
3. Remove Fixed Fairing
A. Remove six bolts, washers, spacers, and locknuts which secure fixed fairing to engine support brackets. (See details A, B, and C, Fig. 401.)
B. Disconnect drain hose from left half of fixed fairing.
C. Remove six bolts and washers which secure left and right halves of fixed fairing together and remove fixed fairing. (See detail D.)
WARNING: POSITION PERSONNEL ON EACH SIDE OF FIXED FAIRING TO SUPPORT AND REMOVE FAIRING HALVES WHEN ATTACHING BOLTS ARE REMOVED.
4. Install Fixed Fairing
A. Position left and right halves of fixed fairing above engine. Secure halves together using six bolts and washers. (See detail D, Fig. 401.) Tighten first, second, fourth, fifth, and sixth bolts to torque of 550 to 670 pound-inches. Tighten third bolt (first aft of forward engine mount) to torque of 855 to 1045 pound-inches.
506
Feb 20/93 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 71-11-21 Page 401
Fixed Fairing Installation 500
71-11-21 Figure 401 (Sheet 1) Feb 20/85
Page 402
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