S 214-008
(4)
Do a visual inspection of the nut plates to determine if they are in acceptable condition. If not, replace them.
TASK 53-11-02-424-004
3. Install the Scuff Plates________________________
A. Consumable Materials
(1)
A00247 - Sealant - BMS5-95
(2)
G00009 - Compound - BMS3-23
(3)
C00064 - Coating - Clear Alodine 1000
(4)
B00148 - Solvent - Methyl Ethyl Ketone (MEK)
(5)
G02185 - Parting Agent - 598-5002 Green Strippable Coating
B. References
(1) AMM 51-31-01/201
C. Access
(1) Location Zones
830 Left side doors
840 Right side doors
D. Procedure
S 114-009
WARNING:_______DO N0T GET SOLVENTS IN YOUR MOUTH OR EYES, OR ON YOUR SKIN. DO NOT BREATHE THE FUMES FROM THE SOLVENTS. SOLVENTS ARE HAZARDOUS MATERIALS. REFER TO PRODUCT SAFETY DATA SHEETS (MSDS) AND LOCAL REQUIREMENTS FOR PROPER HANDLING PROCEDURES.
(1)
Clean all faying surfaces with a solvent and wipe.
S 844-010
(2)
Apply alodine and one coat of BMS10-11 Type I primer to all bare aluminum surfaces including the faying surface of the fuselage skin.
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747-400 MAINTENANCE MANUAL
S 824-011
(3)
Apply a coat of strippable parting agent to all faying surfaces of the threshold, the scuff plates and the fuselage skin.
S 824-012
(4)
Apply the BMS3-23 Type 2 corrosion inhibiting compound to the entire area under the threshold.
NOTE: The area in contact with the scuff plate should be masked to
____ prevent exposure to the corrosion inhibiting compound so the sealant will adhere.
S 214-013
(5)
Check that the nut plates are in the proper position.
S 394-005
(6)
Prepack sealant BMS5-95 to the cap, doorsill mating surface and the skin mating surface. Apply a pressure faying surface seal to the skin over the entire area that contacts the scuff plate. Install scuff plates with fasteners according to the production drawings.
NOTE: It is critical that sufficient sealant be prepacked into the
____ scuff plates to completely fill the gap between the scuff plates and the fuselage skin along the lower edge of the doorway. Continuous sealant squeeze-out is required along all gaps.
S 394-014
WARNING:_______DRAINAGE HOLES MUST BE CLEAR OF SEALANT. REMOVE ANY SEALANT THAT GETS INTO THE DRAINAGE HOLES.
(7) Remove excess sealant from the gap and the edge after squeeze-out has stopped.
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747-400 MAINTENANCE MANUAL
CONTROL CABIN - INSPECTION/CHECK
________________________________
1. General_______
A. This procedure contains one task. The task is the inspection of the right side of the control cabin structure. The inspection of the structure is from STA 340 to 420, from the top of the control cabin to the upper deck floor. Use this procedure to examine the frames, the stringers or the skin for cracks.
TASK 53-11-02-206-016
2. Control Cabin Inspection________________________
A. Standard Tools and Equipment
(1) Borescope - Fujinon Model 1015F or Olympus IF-8D3
B. References
(1)
24-22-00/201, Manual Control
(2)
25-11-03/401, Observers' Seats
(3)
25-14-01/401, Flight Compartment Ceiling Dripshield
(4)
52-21-01/401, Crew Compartment Overhead Hatch
(5)
SRM 53-10-04
C. Access
(1) Location Zones 221/222 Control Cabin 223/224 Forward Upper Deck Passenger Cabin
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