(2)
Remove flight controls lock from trailing edge bypass valve (Ref 27-51-0, MP).
(3)
Remove DO NOT OPERATE tag from alternate flaps arm switch.
WARNING: LEADING FLAPS ARE FAST ACTING AND CAN CAUSE SERIOUS INJURY TO PERSONNEL.
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Feb 01/95 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 33-42-31 Page 203
INBOARD LANDING LIGHTS - ADJUSTMENT/TEST
1. General
A. Each inboard landing light is adjustable laterally and vertically.
B. Two adjustment procedures are provided.
(1)
Method 1 (Preferred) - requires the use of the light aligner, but does not require leveling the airplane.
(2)
Method 2 (Alternate) - does not use the light aligner, but does require the airplane to be approximately level (Ref Chapter 8).
2. Equipment and Materials
A. Lock Assembly, Flight Controls - F80049-1, -2
B. Light Aligner, Part No. PF 33-001, PF Industries, 9320 15th Ave. So., Seattle, WA 98108 (Method 1 - only)
3. Prepare Inboard Landing Light for Adjustment
A. Retract and lock leading edge flaps as follows:
(1)
Install flight controls lock on leading edge devices shutoff valve at standby hydraulic module (Ref 27-81-0 MP).
(2)
Install flight controls lock on trailing edge bypass valve (Ref 27-51-0 MP).
(3)
Check that alternate flaps arm switch is in OFF position and tag switch DO NOT OPERATE.
WARNING: INSTALL FLIGHT CONTROL LOCKS WHEN MAINTENANCE IS BEING PERFORMED IN THE WING LEADING EDGE AREA. FLAPS ARE FAST ACTING AND CAN CAUSE SERIOUS INJURY TO PERSONNEL.
B. Remove landing light lens assembly (Ref 33-42-21 MP).
NOTE: Restrain light cover to keep it from falling and breaking.
4. Adjust Inboard Landing Light - Method 1 (Preferred) (Fig. 501)
A. Position Light Aligner 264 +1 inches forward of light and 101 +1 inches right or left of airplane centerline.
B. Adjust target height per Fig. 501.
C. Provide electrical power (Ref 24-22-0 MP).
D. Check that INBOARD LANDING LIGHT circuit breaker on P18-3 panel is closed.
E. On pilots' overhead panel, place INBOARD LANDING light switch to ON.
CAUTION: DO NOT LEAVE LIGHTS ON MORE THAN 5 MINUTES. ALLOW AT LEAST 5 MINUTES BEFORE TURNING ON AGAIN.
(a) Verify that some alignment status indicators change from yellow to black. The remaining yellow status indicators show approximate location of center of light beam.
F. Turn adjustment screws until all status indicators change to black, except the center indicator, which will remain yellow.
G. Set INBOARD LANDING light switch to OFF.
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Feb 20/87 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 33-42-31 Page 501
5. Adjust Inboard Landing Light - Method 2 (Alternate) (Fig. 502)
A. Prepare inboard landing light for adjustment.
(1) Check that airplane is approximately level (Ref. Chapter 8).
B. Apply electrical power (Ref. 24-22-0 MP).
C. Check that INBOARD LANDING LIGHT circuit breaker on P18-3 panel is closed.
D. On pilots' overhead panel, place INBOARD LANDING light switch to ON.
CAUTION: DO NOT LEAVE LIGHTS ON MORE THAN 5 MINUTES. ALLOW AT LEAST 5 MINUTES BEFORE TURNING ON AGAIN.
E. Turn adjustment screws as required to adjust light so that center of light spot is at point A or A' as applicable.
6. Restore Airplane to Normal Configuration
A. Clean inside of lens assembly with cloth.
B. Install and seal lens assembly (Ref. 33-42-21 R/I).
C. Restore leading edge flaps to normal as follows:
(1)
Remove flight controls lock from leading edge devices shutoff valve at standby hydraulic module (Ref. 27-81-0 MP).
(2)
Remove flight controls lock from trailing edge bypass valve (Ref. 27-51-0 MP).
(3)
Remove DO NOT OPERATE tag from alternate flaps arm switch.
WARNING: LEADING FLAPS ARE FAST ACTING AND CAN CAUSE SERIOUS INJURY TO PERSONNEL.
D. Remove electrical power if no longer required (Ref. 24-22-0 MP).
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33-42-31 Page 502 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. Feb 20/87
F03673
501 Method 1 (Preferred) Inboard Landing Light Adjustment
Aug 01/95 Figure 501 (Sheet 1) 33-42-31
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