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BOEING SERVICE BULLETIN 747-25-3381 STA 1540 STA STA 1560 1480 STA STA 1500 580 STA STA 600 520 STA STA 540 340 STA WL 360 235 UP INBD 00300
FOAM AIR SEAL
LOCATIONS STA 1840 STA 1860 WL 233 UP FWD • 00300 INBD * FOAM AIR SEAL LOCATIONS 2395540 FIGURE 6: MAIN DECK SYSTEM TUBE/IRE FOAM SEAL REPLACEMENT, RIGHT SIDEWALL (SHEET 3 OF 7) Original Issue: August 19, 2010 Revision 3 February 19, 2021 Export Controlled ECCN: 9E991 - BOEING 747-25-3381 PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 108 of 213
BOEING SERVICE BULLETIN 747-25-3381 STA 2080 STA STA 2100 1960
WL STA 233 - 1980 INBD C 00300
FOAM AIR SEAL
LOCATIONS 340 430 STA STA SEE F SIDEWALL UPPER PANEL SIDEWALL LIGHT REVEAL PANEL 2100 STA LOWER
SIDEWALL PANEL FLOOR DADO
PANEL FWD
INBD C AIR GRILLE
MAIN DECK, RIGHT SIDE WALL COVER STRIP 2574517 FIGURE 6: MAIN DECK SYSTEM TUBE/WIRE FOAM SEAL REPLACEMENT, RIGHT SIDEWALL (SHEET 4 OF 7) Original Issue: August 19, 2010 Revision 3 February 19, 2021 PROPRIETARY - Copyright © Unpublished Export Controlled ECCN: 9E991 - BOEING 747-25-3381 Work - See page 1 for details. 109 of 213
BOEING SERVICE BULLETIN 747-25-3381
CEILING BLANKET
PANEL - FABRIC TAB
CAPSTRIP
SYSTEM HOSE
• BLANKET INBD C
BLANKET 1 INCH FLAP FWD C FRAME
TYPICAL
SYSTEM TAPE S SYSTEM RUN HOSE 12S TAPE OR RUN HOSE
TIE WRAP
INSULATION
BLANKET FLAP BLANKET 12OO FOAM BLANKET
ASSEMBLY ASSEMBLY WITH AN INSULATION BLANKET FLAP TYPICAL WITHOUT AN INSULATION BLANKET FLAP TYPICAL 2574520 C-C c-c FIGURE 6: MAIN DECK SYSTEM TUBE/WIRE FOAM SEAL REPLACEMENT, RIGHT SIDEWALL (SHEET 5 OF 7) Original Issue: August 19, 2010 Revision 3 February 19, 2021 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright @ Unpublished 747-25-3381 Work - See page 1 for details. 110 of 213
The step numbers shown below agree with the numbers shown in the circle symbols in the figure. The QTY numbers shown below are the number of parts necessary for each step.
For bulk material rolls, the quantity number shown in the first-use step is the total number of rolls provided in the top kit. The quantity number is not shown in the figure-steps thereafter.
NOTE: If the side wall linings are not removed, refer to 747-400 AMM 25-59-01 as an accepted procedure for removal.
1.
2. The location of the system tube or wire penetrations, shown in this figure, are typical. Operators should look only for similar penetrations between STA 340 and STA 2100. When similar penetrations are found, make only the change given in this figure at those locations.
MORE DATAQTYIDENTIFICATIONNAMETASKSTEP
(a)(d)(e)--FOAMInspect1 From around insulation blanket flap located where tubes or wires penetrate the sidewall insulation.
--TAPE OR TIE WRAP Remove2 Surface before the new foam tape is installed.(b) --SYSTEM TUBES
AND OR WIRES Clean3 Surface before the new foam tape is installed.(b) --INSULATION
BLANKET FLAP Clean Around system tubes or wires to make sure tubes or wires are separated. Fill all the open spaces with foam when multiple tubes or wires pierce the insulation blanket. (c) -015U1780-8 (BMS 1-68, Grade A, Form III Optional) FOAM TAPE, 0.5 T X 2.0 W Put/Hold4 From the bulk material roll. Cut a piece that is 5 inches long, or cut more if more is required to make a smoke barrier. (c) 1015U1780-8 (BMS 1-68, Grade A, Form III Optional) FOAM TAPE, 0.5 T X 2.0 W Install (New) Enough from bulk material roll to wrap around the insulation blanket flap.
-BMS 5-146, Type I, Class 1, Grade A (BMS 5-157, Type I, Class 1, Grade A optional) TAPECut5 Around insulation blanket flap and tubes or wires. Make sure the tape tightly holds the insulation blanket flap so there is no air space and a smoke barrier is made. (f) -BMS 5-146, Type I, Class 1, Grade A (BMS 5-157, Type I, Class 1, Grade A optional) TAPEInstall (New) FIGURE 6: MAIN DECK SYSTEM TUBE/WIRE FOAM SEAL REPLACEMENT, RIGHT SIDEWALL (SHEET 6 OF 7) Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: August 19, 2010 747-25-3381Revision 3 February 19, 2021 111 of 213 BOEING SERVICE BULLETIN 747-25-3381
MORE DATAQTYIDENTIFICATIONNAMETASKSTEP Identify in the vicinity of replaced foam tape that this service bulletin was done. Refer to SOPM 20-50-10 as an accepted procedure for part marking.
--NEW FOAM TAPEIdentify6
(a) Do a general visual inspection on left sidewall between station 340 and station 2100 on the main deck.
Inspect for foam around system runs. If BMS 8-39 found, remove and replace it with the new material.
(b) Refer to SOPM 20-30-03 as an accepted procedure.
(c) Where system tubes or wires penetrate the insulation blanket, make sure all the space inside the insulation blanket flap is filled with foam tape to create a smoke barrier.
(d) Refer to Table 2 in APPENDIX D for a list of existing part numbers for this Figure.
(e) Refer to APPENDIX C for descriptions and example photographs of BMS 8-39 to aid in the identification and removal of the existing BMS 8-39 foam.
(f) Install tape where BMS 1-68 is used to seal system run penetrations through the insulation blanket. If there is no blanket flap or tab present, use tape to attach the foam seal to the insulation blanket.
FIGURE 6: MAIN DECK SYSTEM TUBE/WIRE FOAM SEAL REPLACEMENT, RIGHT SIDEWALL (SHEET 7 OF 7) Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: August 19, 2010 747-25-3381Revision 3 February 19, 2021 112 of 213 BOEING SERVICE BULLETIN 747-25-3381
BOEING SERVICE BULLETIN 747-25-3381 This Figure applies only to: Group 1-3, 6-10, Configuration 1; Group 10, Configuration 2; Group 12-13, Configuration 1; Group 13, Configuration 4; Group 14, Configuration 1, 4; Group 15-16, Configuration 1; Group 16, Configuration 2, 5; Group 17, Configuration 1-2, 5; Group 18-19, Configuration 1; Group 19, Configuration 2, 5.
SEE B SEE SEE STA FLOOR • 680 FWD C BEAM →END
VERTICAL INSULATION POST • BLANKET
STABILIZER STA ANGLE *460
INSULATION
BLANKET UP
FORWARD CARGO COMPARTMENT LEFT SIDE FWD D90354 FIGURE 7: FORWARD CARGO COMPARTMENT SYSTEM TUBE/WIRE FOAM SEAL REPLACEMENT (SHEET 1 OF 8) Original Issue: August 19, 2010 Revision 3 February 19, 2021 PROPRIETARY - Copyright © Unpublished Export Controlled ECCN: 9E991 - BOEING 747-25-3381 Work - See page 1 for details. 113 of 213
BOEING SERVICE BULLETIN 747-25-3381
- VERTICAL POST
STABILIZER
ANGLE - INSULATION
BLANKET 1 BLANKET FLAP 1OOTAPE OR
TIE WRAP
STRINGER S-34 A-A (TYPICAL ARRANGEMENT USED WHERE SYSTEMS PIERCE S-34 TO
STABILIZER ANGLE FIRE BARRIER)
DEO TAPE OR SYSTEM RUN 3 TIE WRAI 12OO FOAM B-B SEAL D90394 (TYPICAL) FIGURE 7: FORWARD CARGO COMPARTMENT SYSTEM TUBE/WIRE FOAM SEAL REPLACEMENT (SHEET 2 OF 8) Original Issue: August 19, 2010 Revision 3 February 19, 2021 Export Controlled ECCN: 9E991 - BOEING L8EE-SZ-LĐL PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 114 of 213
BOEING SERVICE BULLETIN 747-25-3381 STA 820 FLOOR BEAM
STABILIZER ANGLE STA 960
INSULATION
BLANKET @FWD
LEFT SIDE
FORWARD CARGO
COMPARTMENT D90530 FIGURE 7: FORWARD CARGO COMPARTMENT SYSTEM TUBE/WIRE FOAM SEAL REPLACEMENT (SHEET 3 OF 8) Original Issue: August 19, 2010 Revision 3 February 19, 2021 Export Controlled ECCN: 9E991 - BOEING 747-25-3381 PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 115 of 213
BOEING SERVICE BULLETIN 747-25-3381
FORWARD CARGO COMPARTMENT FORWARD CARGO COMPARTMENT
AFT END WALL FORWARD END WALL
INSULATION INSULATION
BLANKET FLAP BLANKET FLAP HALFCAP. HALFCAP
TAPE OR TAPE OR
TIE WRAP TIE WRAP 125 4 10€
TAPE OR TAPE OR
TIE WRAP HALFCAP TIE WRAP HALFCAP
TYPICAL TYPICAL
ARRANGEMENT FOR SYSTEMS PENETRATION
OF FRAME WHEN AN INSULATION BLANKET
FLAP IS PRESENT
ARRANGEMENT FOR SYSTEMS PENETRATION
OF FRAME WHEN AN INSULATION BLANKET
FLAP IS PRESENT
C-C D-D SYSTEM 3 DOO TAPE OR
RUN TIE WRAP TAPE OR TIE WRAP 3) SYSTEM RUN 100 ) SYSTEM RUN SYSTEM 3 RUN
E-E E-E DOOO SA SEAI EXAMPLE, WHERE FOAM IS NOT REQUIRED) (EXAMPLE, WHERE FOAM IS REQUIRED) D90391 FIGURE 7: FORWARD CARGO COMPARTMENT SYSTEM TUBE/WIRE FOAM SEAL REPLACEMENT (SHEET 4 OF 8) Original Issue: August 19, 2010 Revision 3 February 19, 2021 Export Controlled ECCN: 9E991 - BOEING 747-25-3381 PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 116 of 213
BOEING SERVICE BULLETIN 747-25-3381 FLOOR
BEAM STA 460
STABILIZER ANGLE STA 960
INSULATION
BLANKET
RIGHT SIDE
FORWARD CARGO
COMPARTMENT F WD < D90535 FIGURE 7: FORWARD CARGO COMPARTMENT SYSTEM TUBE/WIRE FOAM SEAL REPLACEMENT (SHEET 5 OF 8) Original Issue: August 19, 2010 Revision 3 February 19, 2021 PROPRIETARY - Copyright © Unpublished Export Controlled ECCN: 9E991 - BOEING 747-25-3381 Work - See page 1 for details. 117 of 213
BOEING SERVICE BULLETIN 747-25-3381
FORWARD CARGO COMPARTMENT FORWARD CARGO COMPARTMENT
AFT END WALL FORWARD END WALL
TAPE TAPE 120
NEW FOAM NEW FOAM WRAPPED WRAPPED*
IN TAPE IN TAPE 100 100
TAPE TAPE → FWD
TYPICAL ARRANGEMENT FOR
SYSTEMS PENETRATION WHEN AN
INSULATION BLANKET FLAP IS
NOT PRESENT C-C
TYPICAL ARRANGEMENT FOR
SYSTEMS PENETRATION WHEN AN
INSULATION BLANKET FLAP IS
NOT PRESENT D-D
TAPE F SYSTEM
RUN HOSE SYSTEM 3 DO TAPE OR
RUN TIE WRAP
3) SYSTEM RUN SYSTEM (3 RUN 206 FOAM SEAL
TYPICAL TYPICAL BLANKET
F-F G-G
ASSEMBLY FIGURE 7: FORWARD CARGO COMPARTMENT SYSTEM TUBE/WIRE FOAM SEAL REPLACEMENT (SHEET 6 OF 8) Original Issue: August 19, 2010 Revision 3 February 19, 2021 Export Controlled ECCN: 9E991 - BOEING 747-25-3381 PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 118 of 213
The step numbers shown below agree with the numbers shown in the circle symbols in the figure. The QTY numbers shown for parts used in each step are the total number of parts necessary for each step.
For bulk material rolls, the quantity number shown in the first-use step is the total number of rolls provided in the top kit. The quantity number is not shown in the figure-steps thereafter.
NOTE: If the sidewall linings, ball transfer panels and roller trays were not removed, refer to 747-400 AMM 25-52-01 and 747-400 AMM 25-53-15 as accepted procedures for removal.
1.
2. The locations of the system tube or wire penetrations on the sloping sidewall, shown in this figure, are typical. Inspect for similar penetrations around the perimeter STA 460 to STA 960, along the stabilizer angle near Stringer S-34. Any penetrations through the insulation blankets between the applicable stringer and the applicable stabilizer angle must be sealed for halon/smoke retention. Refer to APPENDIX C for an illustrated visual aid.
3. The locations of the system tube or wire penetrations under the floor, shown in this figure, are typical. Inspect for similar penetrations on the insulation blanket from the left to right side between STA 460 and STA 960. Refer to APPENDIX C for an illustrated visual aid. Any penetrations through the insulation blankets must be sealed for halon/smoke retention.
MORE DATAQTYIDENTIFICATIONNAMETASKSTEP Refer to Notes 1 and2. (a)(c)(d)--FOAMInspect1 From around insulation blanket flap located where tubes or wires penetrate the insulation.
Refer to Note 2.
--TAPE OR TIE WRAP Remove2 From inside the insulation blanket flap. (c)(d) --FOAMRemove Surface before the new foam tape is installed. Use mechanical means to remove debris.
--SYSTEM RUNClean3 Surface before the new foam tape is installed. Use mechanical means to remove debris.
--INSULATION
BLANKET FLAP Clean Around system tubes or wires to make sure tubes or wires are separated. Fill all the open spaces when multiple tubes or wires pierce the insulation blanket. (b) -15U1780-8 (BMS 1-68, Grade A, Form III Optional) FOAM TAPE, 0.5 T X 2.0 W Put/Hold4 From the bulk material roll. Cut a piece that is 5 inches long, or cut more if more is required to make a smoke barrier. (b) -015U1780-8 (BMS 1-68, Grade A, Form III Optional) FOAM TAPE, 0.5 T X 2.0 W Install (New) FIGURE 7: FORWARD CARGO COMPARTMENT SYSTEM TUBE/WIRE FOAM SEAL REPLACEMENT (SHEET 7 OF 8) Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: August 19, 2010 747-25-3381Revision 3 February 19, 2021 119 of 213 BOEING SERVICE BULLETIN 747-25-3381