________________________________________________________________________ MAINTENANCE PRACTICES
_____________________ R **ON A/C 001-049, 051-099, 101-105,
 TASK 31-33-00-100-001
 Optical QAR Drive Lens Cleaning Procedure
 1.
 Reason for the Job

__________________
 Self Explanatory

 2.
 Job Set-up Information

______________________
 A. Fixtures, Tools, Test and Support Equipment
 -------------------------------------------------------------------------------
REFERENCE QTY DESIGNATION
 -------------------------------------------------------------------------------
No specific access platform
 No specific LENS Optical Disk Drive Cleaner

 B. Referenced Information
 -------------------------------------------------------------------------------
REFERENCE DESIGNATION
 -------------------------------------------------------------------------------
24-41-00-861-002 Energize the Aircraft Electrical Circuits from the External Power 24-41-00-862-002 De-energize the Aircraft Electrical Circuits Supplied
 from the External Power 31-33-00-710-005 Operational Test of the QAR 52-41-00-010-002 Open the Avionics Compartment Doors for Access 52-41-00-410-002 Close the Avionics Compartment Doors after Access 31-33-00-991-007 Fig. 201
 3. Job Set-up
__________
 Subtask 31-33-00-861-057

 A. Energize the aircraft electrical circuits
 (Ref. TASK 24-41-00-861-002).

 1EFF : ALL 1 31-33-00Page 201 1 1 May 01/05 1 1 1CES 1 Subtask 31-33-00-010-053

 B. Get Access
 (1) Put the access platform in position below the access door 824.
 (2)
 Open the access door 824. (Ref. TASK 52-41-00-010-002) Subtask 31-33-00-865-066

 C.
 Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged

 -------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------121VU RCDR/ACCLRM 9TU K18 121VU FDIU & QAR 8TU K17
 4. Procedure
_________ Subtask 31-33-00-100-050
 A. Do the Optical QAR Drive Cleaning Procedure.
 (Ref. Fig. 201/TASK 31-33-00-991-007)

 CAUTION : DO NOT TOUCH THE BRUSH.
_______ DO NOT USE SOLVENTS. KEEP THIS CLEANER IN A CLEAN, DRY LOCATION. A CONTAMINATED BRUSH CAN CAUSE DAMAGE TO THE DRIVE.
 (1)
 Open the recorder door.

 (2)
 If the optical disk is installed, remove it.

 (a)
 On the panel 121VU:
 close the circuit breakers 8TU and 9TU.

 (b)
 Eject the optical disk.

 (c)
 On the panel 121VU: open, safety and tag the circuit breakers 8TU and 9TU.

 (3)
 Remove the brush cover from the LENS Optical Disk Drive Cleaner. NOTE : The P/N of the LENS Optical Disk Drive Cleaner is contained in

____
 the QAR Vendor manual.

R 1EFF : 001-049, 051-099, 101-105, 1 31-33-00Page 202 1 1 May 01/05 1 1 1CES 1

 Optical Disk Drive Cleaner
 Figure 201/TASK 31-33-00-991-007

R 1EFF : 001-049, 051-099, 101-105, 1 31-33-00Page 203 1 1 May 01/05 1 1 1CES 1

 (4)
 Put the cleaner in the disk drive, so that the arrow is on top.

 (5)
 Insert cleaner: CAUTION : DO NOT USE FORCE WHEN YOU PUSH IN THE CLEANER. FORCE CAN

_______
 CAUSE DAMAGE TO THE DRIVE.

 (a) Insert the cleaner slowly and carefully into the disk drive until it touches the stopper.
 (6)
 Pull back the cleaner approximately 5 centimeters (2 inches).

 (7)
 Repeat the two last steps approximately 10 times to complete the cleaning.

 (8)
 Remove the cleaner from the disk drive.

 (9)
 Put the brush cover on the cleaner and put it in a clean, dry place. NOTE : You must not use the cleaner more than 60 times or if the tips

____ of the brush have become wider or discolored. The specifications and appearance of the cleaner can change without notice.
 (10)
 On the panel 121VU:
 close the circuit breaker 8TU and 9TU.

 (11)
 Insert the optical disk into the disk drive.

 (12)
 Close and lock the recorder door.

 5. Close-up
________ Subtask 31-33-00-710-065
 A. Do the operational test of the QAR (Ref. TASK 31-33-00-710-005). Subtask 31-33-00-410-052
　
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