R 5. Operation_________
R (Ref. Fig. 002)
R With the switch NAV & LOGO (3LA) set to 1 or 2, 115 V AC is supplied to the
R relays 6LA and 7LA. When the flaps are lowered to 15 degrees or more, or the
R landing-gear struts are compressed, a ground signal is received. This
R energizes the coil of the relay 5LY. Power is then supplied to the step-down
R transformer of the light assemblies. From these transformers a decreased
R voltage of 28 V DC is supplied to the logo lights 3LY (4LY) which causes the
R logo lights to go on.
R When the landing-gear is retracted, and the flaps are retracted to less than
R 15 degrees, the ground signal is removed. In this condition, the logo lights
R go out. Also, with the switch 3LA set to OFF, the relays 6LA and 7LA are
R de-energized which causes the logo lights to go out.
R
LOGO LIGHTS - DEACTIVATION/REACTIVATION
_______________________________________
TASK 33-47-00-040-001
Deactivation of the logo light lens (cover)
1. Reason for the Job
__________________
Refer to the CDL TASK: 33-5
Logo light lens (cover)
2. Job Set-up Information
______________________
A. Fixtures, Tools, Test and Support Equipment
-------------------------------------------------------------------------------
REFERENCE QTY DESIGNATION
-------------------------------------------------------------------------------
No specific circuit breaker(s) safety clip(s)
B. Consumable Materials
-------------------------------------------------------------------------------
REFERENCE DESIGNATION
-------------------------------------------------------------------------------
Material No. 05-065 C Z-24.380
EROSION PROTECTIVE TAPE (Ref. 20-31-00) R Material No. 05-096 AIB AIMS 04-12-001 R POLYURETHANE ADHESIVE TAPE (Ref. 20-31-00)
C. Referenced Information
-------------------------------------------------------------------------------
REFERENCE DESIGNATION
-------------------------------------------------------------------------------
24-41-00-862-002 De-energize the Aircraft Electrical Circuits Supplied from the External Power 33-47-11-600-001 Servicing of the Logo Light 3LY (4LY)
3. Job Set-up
__________ Subtask 33-47-00-860-052
A. Aircraft Maintenance Configuration
(1) On panel 25VU make sure that the switch 3LA NAV & LOGO ON/OFF is in the OFF position.
Subtask 33-47-00-860-053
B. De-energize Electrical Circuits
(1) De-energize Electrical Circuits(Ref. TASK 24-41-00-862-002). Subtask 33-47-00-865-052
C. Open, safety and tag this(these) circuit breaker(s):
-------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------122VU LIGHTING/LOGO/L 2LY V03 122VU LIGHTING/LOGO/R 1LY V02
Subtask 33-47-00-941-050
D. Safety Precautions
(1) Put the warning notices in the flight compartment to tell persons not to operate the logo light.
Subtask 33-47-00-010-051
E. Get access
(1) Put the access platform in position 334ABfor the left hand logo light and/or zone 344ABfor the right hand logo light.
1EFF : ALL 1 33-47-00Page 402 1 1 Nov 01/01R 1 1 1CES 1
4. Procedure
_________
Subtask 33-47-00-040-050
A. Deactivation of the logo light lens
(1)
Remove the logo light lens (Ref. TASK 33-47-11-600-001).
(2)
Clean the surface arrond the logo light hole.
(3)
Cover the logo light hole with high speed tape SPECIAL MATERIALS (Material No. 05-065).
R NOTE : If this kind of high speed tape is not available you can also
____ R use SPECIAL MATERIALS (Material No. 05-096) as alternative R solution.
(4) Write a note in the technical log that the logo light lens has been deactivate.
5. Close-up
________
Subtask 33-47-00-865-053
A. Close this (these) circuit breakers : 1LY, 2LY
Subtask 33-47-00-942-052
B. Removal of Equipment
(1)
Make sure that the area is clean and clear of tool(s) and other items.
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