H20735 H20737
Decoupled Static Discharger Base Replacement 501
23-61-0 Rivet or Screw Locations Aug 01/74
Page 402 Figure 401 (Sheet 1)
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
501 Decoupled Static Discharger Base Replacement
Aug 01/74 Rivet or Screw Locations 23-61-0
Figure 401 (Sheet 2) Page 403
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
2. Remove Static Discharger Base (Fig. 401)
A. Prepare to remove Static Discharger Base.
(1)
Remove pressure and power from the hydraulic systems for the applicable flight control surfaces (Ref 27-11-0 MP, 27-21-0 MP, 27-31-0 MP).
WARNING: MAKE SURE PRESSURE IS REMOVED FROM HYDRAULIC SYSTEMS. MAKE SURE HYDRAULIC POWER AND ELECTRICAL POWER ARE NOT SUPPLIED. IF HYDRAULIC PRESSURE IS PRESENT OR HYDRAULIC / ELECTRICAL POWER IS SUPPLIED, THE FLIGHT CONTROL SURFACES CAN MOVE. THIS CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
(2)
Remove power from the electrical system (Ref 24-22-0 MP).
B. Loosen discharger setscrew and remove discharger from base.
CAUTION: THE DISCHARGER IS SECURED TO THE BASE BY A BRISTOL HEAD SCREW. CARE MUST BE EXERCISED WHEN REMOVING OR INSTALLING DISCHARGER TO ENSURE THE THREADS OR RECESSED HEAD OF THE SETSCREW IS NOT DAMAGED.
C. Mark position of discharger base beyond cleaning area with a nondestructive marking. Check that line is parallel with slipstream.
D. Remove rivets from base per 51-30-2 in Structural Repair Manual.
E. Scrape off sealant along one edge of base with plastic scraper and apply chemical stripper to adhesive fillet.
F. After 30 minutes the surface of the sealant will soften and may be scraped off with a plastic scraper.
G. Insert a sharp, broad-bladed putty knife under edge of base and lift base off.
CAUTION: EXTREME CARE MUST BE TAKEN TO AVOID DAMAGING AIRPLANE SURFACES, ESPECIALLY HONEYCOMB PANELS.
3. Install Static Discharger Base (Fig. 401)
A. Prepare to Install Static Discharger Bases
(1)
Remove pressure and power from the hydraulic systems for the applicable flight control surfaces (Ref 27-11-0 MP, 27-21-0 MP, 27-31-0 MP).
WARNING: MAKE SURE PRESSURE IS REMOVED FROM HYDRAULIC SYSTEMS. MAKE SURE HYDRAULIC POWER AND ELECTRICAL POWER ARE NOT SUPPLIED. IF HYDRAULIC PRESSURE IS PRESENT OR HYDRAULIC / ELECTRICAL POWER IS SUPPLIED, THE FLIGHT CONTROL SURFACES CAN MOVE. THIS CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
(2)
Remove power from the electrical system (Ref 24-22-0 MP).
(3)
Aluminum skin
(a)
Build a dam around sealant residue using putty or modeling clay and fill dam with stripper until sealant is completely covered. Allow sealant to soften for 30 minutes or longer if necessary.
(b)
Scrape sealant with a plastic scraper. Depending on thickness of sealant repeat step
(a) until all residue is removed.
(c)
Clean and degrease bonding area with applicable cleaning solvent, Series 88 (Ref. 20-30-88). Apply solvent from squeeze bottle or safety can with clean oil-free gauze or cheesecloth.
WARNING: DO NOT GET SOLVENT IN YOUR MOUTH OR EYES, OR ON YOUR SKIN. DO NOT BREATHE THE FUMES FROM SOLVENTS. SOLVENTS ARE HAZARDOUS MATERIALS. REFER TO PRODUCT MATERIAL SAFETY DATA SHEETS (MSDS) AND LOCAL REQUIREMENTS FOR PROPER HANDLING PROCEDURES.
(d)
Wipe off solvent before it evaporates using more clean gauze or cheesecloth. Do not touch surface with fingers.
(e)
Prepare sealant as described in par. 3.B. below.
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