c)  Make sure that the multimeter indications is 1-100 megohms at each point.
d)  If the surface resistance is less than 1 megohm remove and apply the
antistatic paint again. e) If the surface resistivity is more than 100 megohms, dry the antistatic paint and measure the resistance again.
(h)  Apply 8.0 mils erosion coating from the nose tip to STA 138.6.
1)  Use the optional finish as follows: a) Apply 8-10 mils of BMS 10-60, Type II enamel from the nose to STA 138.6.
500 
Jun 20/91  BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.  53-52-0 Page 709 

NOSE RADOME - APPROVED REPAIRS
1.  Equipment and Materials
A.  Tape - Scotch Brand No. 850 (clear), No. 853, or Permacel P95
2.  Repair Nose Radome
A.  Temporary Repair

(1)  
Repair 1-square inch damage at earliest available opportunity, provided damage is sealed from moisture by use of tape.

(2)  
Holes larger than 1 square inch must be repaired permanently per par. B.

B.  Permanent Repair

(1)  Permanent repair of nose radome must be made per Structural Repair Manual, Chapter 51, Fiberglass Cloth Reinforced Plastics Repair.
500 
Feb 15/77  BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.  53-52-0 Page 801 

NOSE RADOME EROSION COATING - APPROVED REPAIRS
1.  Repair Nose Radome Erosion Coating
A.  Prestec paints No. 2301 (black) or No. 2300 Series (gray) are used as an erosion coating. Apply three to four mils (0.003 to 0.004 inch) of Prestec paint per Nose Radome -Cleaning/Painting. Application of black or gray Prestec is the same as application of white Prestec.
500 
Feb 15/73  BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.  53-52-21 Page 801 

GLIDE SLOPE ANTENNA DIRECTOR BAR - REMOVAL/INSTALLATION
1. General
A.  The director bar is an aluminum foil pressure-sensitive tape attached to the inner surface of the nose radome. It alters the glide slope radiation antenna patterns.
2.  Equipment and Materials
A.  Aliphatic Naphtha (Ref 20-30-31)
B.  1/2 inch wide aluminum foil pressure sensitive tape - No. 425, BAC5801 (Ref 20-30-51)
C.  Primer BMS 10-11 Type I (Ref 20-30-41)
D.  Solvent BMS 3-2 Type I (Ref 20-30-31)
3.  Remove Director Bar (Fig. 401)
A.  Open nose radome (Ref 53-52-0 R/I)
B.  Remove director bar by peeling off tape.
4.  Install Director Bar (Fig. 401)
A.  Using aliphatic naphtha, clean surface where director bar will be installed.
B.  Apply one coat of primer to areas where director bar will be installed.
C.  Clean primed and cured surface with solvent.
D.  Cut strip of Aluminum Foil Tape 13.00 inches long.
E.  Apply tape per Fig. 401 and press firmly in place.
F.  Install M1458 decal inside radome as shown in Fig. 401, if not already installed.
G.  Close nose radome (Ref 53-52-0 R/I)
501 
Feb 20/89  BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.  53-52-31 Page 401 

Glide Slope Antenna Director Bar Installation  501 
53-52-31  Figure 401  May 01/01 
Page 402 
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 

TAIL CONE - REMOVAL/INSTALLATION
1.  Equipment and Materials
A.  Suitable Stand
B.  Protective Plastic Shield

2.  Prepare to Remove Tail Cone
A.  Move stabilizer to leading edge down position and elevators to up position. Install protective plastic shields with tape on tail cone where elevators might cause interference.
B.  Open ACC COMP LITS circuit breaker on panel P18. On airplanes with a tail cone oscillating navigational light, open OSC NAV LT circuit breaker on P18.
C.  Remove access panels 3801 and 3802 (Ref Chapter 12).
D.  Remove aft fairing and exhaust duct (Ref Chapter 49, Aft Fairing - R/I and Exhaust Duct - R/I).
E.  If additional clearance is desired, position stabilizer to neutral (3 1/2 units) and disconnect both elevator control pushrods (Ref 27-31-11). Tag elevator controls DO-NOT-MOVE.
F.  One elevator may be removed (Ref 27-31-11 R/I), if required, to obtain greater tail cone removal clearance.
G.  Add alignment marks (or masking tape) to facilitate reinstallation of tail cone in exact same location.
3.  Remove Tail Cone
A.  Disconnect wire bundle at electrical connector located on bulkhead at body station 1156.
　
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