(4) Remove the access platform(s).
 Subtask 53-19-41-862-050

 B. De-energize the aircraft electrical circuit (Ref. TASK 24-41-00-862-002).
R  EFF : 001-049, 054-099, 101-149, 151-199, 53-19-41Page 408 201-299, 301-399, 401-499, Aug 01/05
 CES  EFF : ALL

R  **ON A/C ALL 
R  TASK 53-19-41-000-003 
R  Removal of the Drain Valves 
R  1. Reason for the Job__________________ 
R  Self Explanatory 
R  2. Job Set-up Information______________________ 
R  A. Fixtures, Tools, Test and Support Equipment 
R  -------------------------------------------------------------------------------
R  REFERENCE QTY DESIGNATION 
R  -------------------------------------------------------------------------------
R  No specific non metallic scraper 
R  No specific access platform 1.6 m (5 ft. 3 in.) 
R  B. Consumable Materials 
R  -------------------------------------------------------------------------------
R  REFERENCE DESIGNATION 
R  -------------------------------------------------------------------------------
R  Material No. 11-004 USA MIL-T-81533 
R  1.1.1TRICHLOROETHANE (METHYL CHLOROFORM) 
R  (Ref. 20-31-00) 
R  Material No. 19-003 USA AMS 3819 
R  LINT-FREE COTTON CLOTH (Ref. 20-31-00) 
R  C. Referenced Information 
R  -------------------------------------------------------------------------------
R  REFERENCE DESIGNATION 
R  -------------------------------------------------------------------------------
R  24-41-00-861-002 Energize the Aircraft Electrical Circuits from the 
R  External Power 
R  53-12-13-000-001 Removal of the avionics compartment floor panels 
R  53-19-41-991-003 Fig. 402

53-19-41Page 409
Nov 01/00

R  3. Job Set-up__________ 
R  Subtask 53-19-41-861-052 
R  A. Energize the aircraft electrical circuits 
R  (Ref. TASK 24-41-00-861-002). 
R  Subtask 53-19-41-010-053 
R  B. Get access to the Avionics Compartment 
R  (1) Put an access platform in position at zone 811. 
R  (2) Open the avionics-compartment access door 811. 
R  (3) Put an access platform in position at zone 824. 
R  (4) Open the avionics-compartment access door 824. 
R  (5) On the panel 50VU: 
R  - push the AVIONICS/COMPT LT pushbutton switch 23LS. 
R  Subtask 53-19-41-010-054 
R  C. Removal of Components 
R  (1) In the avionics compartment, remove the applicable floor panel 
R  (Ref. TASK 53-12-13-000-001). 
R  (2) Remove the insulation blanket. 
R  4. Procedure_________ 
R  Subtask 53-19-41-020-052 
R  A. Removal of the Drain Valve 
R  (Ref. Fig. 402/TASK 53-19-41-991-003) 
R  (1) Remove the remaining sealant with CLEANING AGENTS (Material No. 11-
R  004), MISCELLANEOUS (Material No. 19-003) and a non metallic scraper 
R  around the valve (4). 
R  (2) Remove the valve (4). 
R  (3) Remove the two bolts (3).

 EFF : ALL
53-19-41Page 410
Nov 01/00

R R  Drain Valve Figure 402/TASK 53-19-41-991-003
 EFF :  ALL  53-19-41 Page 411 Nov 01/00
 CES 

R  (4) Remove the remaining sealant with CLEANING AGENTS (Material No. 11-
R  004), MISCELLANEOUS (Material No. 19-003) and a non metallic scraper 
R  around the retaining valve (2). 
R  (5) Remove the two nuts (1). 
R  (6) Remove the retaining valve (2).

 EFF : ALL
53-19-41Page 412

 TASK 53-19-41-400-003

 Installation of the Drain Valves
 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 1.6 m (5 ft. 3 in.)
 B. Consumable Materials
 -------------------------------------------------------------------------------
　
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