THIS TOP COATING SHALL INCLUDE PARTS WHICH WERE PERVIOUSLY COATED WITH F19.22
VENT STRINGER REWORK - CORROSION PROTECTION

ALL INTERIOR SURFACES OF STRUCTURAL VENTS (OPTIONAL USE OF EC776SR, APPLIED PER BAC5741, FOR FINISH
TOUCH-UP ON INTERIOR SURFACES OF THE STRUCTURAL VENTS ONLY)
SPARS - CORROSION PROTECTION
APPLY CORROSION PREVENTIVE FILLET SEALING TO EXTERIOR SURFACES OF FRONT AND REAR SPARS PER 65-47802,

64-47803, 65-47812

Wing Sealing Index and Requirements
Figure 2 (Sheet 4)

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
REFERENCE SPECIFICATIONS SEALING, GENERAL BAC5000 FLUID TIGHT FASTENER INSTALLATION BAC5047 MARKINGS IN INTEGRAL FUEL TANK AREAS BAC5307 INTEGRAL FUEL TANK STRUCTURE SEALING BAC5504 SEALING, GENERAL (FS AT BBL 70.85) BAC5510 SECONDARY FUEL BARRIER SEALANT BAC5527 APPLICATION OF BUNA N TYPE COATING TO INTEGRAL FUEL TANK BAC5741 CORROSION PROTECTION IN INTEGRAL FUEL TANKS BAC5793
SEC APL  DRAWING  NOMENCLATURE 
71  65-59637  SEAL APPLICATION - FIREWALL, NACELLE TO WING FAIRING 
10 & 11  65-47814  SEAL APPLICATION - INBD FAIRING 
12 & 14  65-47812  SEAL APPLICATION - LEADING EDGE & TRAILING EDGE 
11  65-47811  SEAL APPLICATION - PRESSURE FLOOR 
11  65-47810  SEAL APPLICATION - CENTER SECTION 
12  65-47809  SEAL APPLICATION - DRY BAY WBL 157 - WBL 227 
12  65-47808  SEAL APPLICATION - TANK END RIB W STA 583 
12  65-47807  SEAL APPLICATION - TANK END RIB W STA 531 
12  65-47806  SEAL APPLICATION - TANK END RIB WBL 70.85 
12  65-47805  SEAL APPLICATION - LOWER PANEL 
12  65-47804  SEAL APPLICATION - UPPER PANEL 
12  65-47803  SEAL APPLICATION - REAR SPAR 
12  65-47802  SEAL APPLICATION - FRONT SPAR 
11  65-45411  STRUCTURE ASSY - WING CENTER SECTION 
10  65-79938  SEAL APPLICATION - INBD LE WING 

Wing Sealing Index and Requirements
Figure 2 (Sheet 5)

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
 B. Definitions for Figure 2, Wing Sealing Index and Requirements.
 (1)  
Absolute Sealing

 (a)  All seams, holes, slots, joggles and instructure fastened to the seal plane shall be sealed (except instructure attached with self-sealing fasteners). All fasteners required sealing except self-sealing fasteners which must be oriented correctly.

 (2)  
Extensive Sealing

 (a)  All seams, holes, slots, and joggles in the seal plane must be sealed. Fasteners in class II holes or larger in the seal plane must be sealed.

 (3)  
Intermediate Sealing

 (a)  Same as extensive sealing except fasteners do not require sealing.

 (4)  
limited Sealing

 (a)  Same as extensive sealing except seams and fasteners do not require sealing.

 (5)  
Emergency Sealing

 (a)  A seal which backs up a primary seal so as to become functional when primary seal failure occurs and safely controls leakage. Bladder cells are considered primary seals.

 (6)  
Isolation Sealing

 (a)  A seal which limits traveling of fuel to facilitate leak detection.

 (7)  
Secondary Barrier Coating

 (a)  A fuel tank exterior coating for vapor and fuel protection on surfaces exposed to pressurized compartments of the airplane.
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