# SERVICE BULLETIN

30 May 2008 Rev. 1, 13 Apr 2010 Page 1 of 7 

## 174080-35-02 The information disclosed herein was originated by and is the property of B/E Aerospace, Inc., and except for rights expressly granted to the U.S. Government, B/ E Aerospace, Inc. reserves all patent, proprietary,design, use, manufacturing, and reproduction rights thereto.



### OXYGEN - PASSENGER OXYGEN SYSTEM MASK IN-LINE FLOW INDICATOR REPLACEMENT I. Planning Information A. Effectivity This Service Bulletin applies to Airbus aircraft th at use passenger oxygen mask part numbers 174080-XX, 174085-XX, 174095-XX, and 174098-XX manu factured on or after January 1, 2002 and before March 1, 2006. Table 1 below lists the effective B/E part numbers. This Service Bulletin applie s to spare masks in stores, as well as those installe d on aircraft. Table 1 Effective Passenger Mask Part Numbers

B. Reason Some existing flow indicators are vulnerable to fra cturing which causes parts of the indicator to separate. If this occurs, the oxygen cannot flow tothe user of the mask when needed during an emergency. B/E PART NUMBER 174080-73 174085-96 174098-01 174080-74 174085-97 174098-02 174080-76 174085-98 174098-03 174080-87 174095-1E 174098-04 174080-96 174095-73 174098-05 174080-97 174095-74 174098-06 174080-98 174095-76 174085-73 174095-87 174085-74 174095-96 174085-76 174095-97 174085-87 174095-98

## 174080-35-02

30 May 2008 Rev. 1, 13 Apr 2010 

### B/E AEROSPACE Service Bulletin

Page 2 of 7 C. Description This Service Bulletin describes the optional replac ement of flow indicator part number 118023-02 with the improved flow indicator part number 118023-12. The improved flow indicator can be identified by the green marking (refer to Figure 1). The operator may purchase a replacement mask with t he improved flow indicator installed as an alternative to performing the modification covered by this Service Bulletin.

Figure 1 Flow Indicators D. Compliance Performance of this Service Bulletin is optional. E. Approval This Service Bulletin has been reviewed by Airbus a nd the FAA. F. Manpower Assuming access has been obtained to the unit, the following is an estimate to accomplish the modification: Verification: .6 min. Disassembly: .3 min. Assembly: 1.2 min. Testing: .4 min. Cleaning: .5 min. Total Modification: 3.0 min. G. Material - Price and Availability (1) Modification requires the following: Quantity Part Number Name 1 118023-12 Flow Indicator

## 174080-35-02

30 May 2008 Rev. 1, 13 Apr 2010 

### B/E AEROSPACE Service Bulletin

Page 3 of 7 (2) Material may be obtained from: B/E Aerospace, Inc. Commercial Aircraft Products Group 10800 Pflumm Road Lenexa, KS 66215 TEL: (913) 338-9800 FAX: (913) 469-8419 (3) Delivery determined upon request. H. Tooling - Price and Availability Tubing Stretcher Tool part number 997300-00, availa ble from B/E Aerospace, Lenexa, KS (refer to Figure 2). I. Weight and Balance This modification will not affect the weight or bal ance. J. Electrical Load Data This modification will not affect electrical load d ata. K. Other Publications Affected

Part Number CMM Number Dated 174080-XX 35-20-96 2003/06/12 174085-XX 35-24-02 2002/07/24 174095-XX 35-24-04 2000/11/01 II. Accomplishment Instructions A. Verification (1) Make sure the part number shown on the mask datalabel is listed in Table 1. If the part number is not listed, no further action is required (refer toFigure 3 for location of data label). (2) Make sure the date of manufacture shown on the m ask data label is on or after January 1, 2002 and before March 1, 2006. If the date is outside th is range, no further action is required (refer to Figure 3 for location of data label). (3) Make sure the marking, "FLOW", on the flow indic ator is in black and the letter "W" does not appear on the right side of the mask data label (approximate location is shown in Figure 3). In the event the marking on the flow indicator is in green and the l etter "W" is on the right side of the data label, f low indicator replacement has already been implemented. No further action is required. B. Disassembly (refer to Figure 3) WARNING: THE USE OF OIL AND OTHER PETROLEUM BASE LUBRICANTS ON OXYGEN

EQUIPMENT WILL CREATE A DANGEROUS FIRE HAZARD. CAUTION: THE WORK AREA MUST BE CLEAN AND FREE OF HYDROCARBON RESIDUE, OIL,

OR OTHER PETROLEUM BASE LUBRICANTS.

## 174080-35-02

30 May 2008 Rev. 1, 13 Apr 2010 

### B/E AEROSPACE Service Bulletin

Page 4 of 7 CAUTION: ALL INSTRUMENTS, TOOLS, FIXTURES, TEST EQUIPMENT, A ND OTHER

MATERIALS WHICH COME INTO CONTACT EITHER DIRECTLY O R INDIRECTLY WITH THE UNIT OR ITS PARTS SHOULD BE CLEAN AND FREE OF HYDROCARBON RESIDUE, OIL, OR OTHER PETROLEUM BASE LUBRICANTS. WARNING: BE CAREFUL TO CUT OFF ONLY A MINIMUM AMOUNT OF TUBI NG (1, 4). CUT OFF

NO MORE THAN TWO INCHES OF TUBING FROM BOTH TUBES ( 1, 4) TOGETHER. (1) Cut the supply tube (4) loose from the flow indi cator (2). (2) Cut the flow indicator (2) loose from the mask b ag assembly tube (1). NOTE: Cut the tubing (1, 4) square so that the end is fla t and perpendicular to the axis of the tube. C. Assembly (refer to Figure 3 unless otherwise stated) WARNING: THE USE OF OIL AND OTHER PETROLEUM BASE LUBRICANTS ON OXYGEN

EQUIPMENT WILL CREATE A DANGEROUS FIRE HAZARD. CAUTION: THE WORK AREA MUST BE CLEAN AND FREE OF HYDROCARBON RESIDUE, OIL,

OR OTHER PETROLEUM BASE LUBRICANTS. CAUTION: ALL INSTRUMENTS, TOOLS, FIXTURES, TEST EQUIPMENT, A ND OTHER

MATERIALS WHICH COME INTO CONTACT EITHER DIRECTLY O R INDIRECTLY WITH THE UNIT OR ITS PARTS SHOULD BE CLEAN AND FREE OF HYDROCARBON RESIDUE, OIL, OR OTHER PETROLEUM BASE LUBRICANTS. WARNING: THE NEW FLOW INDICATOR (3) MUST BE INSTALLED SO THAT THE FLOW

DIRECTION IS FROM THE SUPPLY TUBE (4) TOWARD THE MA SK BAG ASSEMBLY TUBE (1). THE ARROW ON THE FLOW INDICATOR(3) SHOULD POINT TOWARDS THE BAG. IF THE NEW FLOW INDICATOR (3) IS INSTALLED BACKWARDS, THE FLOW INDICATOR WILL NOT SHOW WHEN OX YGEN FLOWS TO THE MASK. CAUTION: THE SUPPLY TUBE (4) AND THE MASK BAG ASSEMBLY TUBE (1) ENDS SHOULD

ALWAYS BE FULLY INSTALLED ON THE FLOW INDICATOR (3) (UP TO THE SHOULDER OF THE FLOW INDICATOR). CAUTION: THE TUBING STRETCHER TOOL PART NUMBER 997300-00 MUS T BE SECURED

TO A BENCH TOP BEFORE USE (REFER TO FIGURE 2). (1) Use the Tubing Stretcher Tool part number 997300 -00 (refer to Figure 2) to expand the inside diameter of the end of the mask bag assembly tube ( 1). CAUTION: DO NOT MAKE THE INSIDE DIAMETER OF THE MASK BAG ASS EMBLY TUBE (1)

LARGER THAN THE DIAMETER NEEDED TO PUT THE TUBE OVE R THE OUTSIDE OF THE FITTING OF THE NEW FLOW INDICATOR (3). DO NO T MAKE THE INSIDE DIAMETER OF THE MASK BAG ASSEMBLY TUBE (1) SO LARGE THAT THE TUBE SPLITS OR DISCOLORATION OF THE TUBE OCCURS. (2) Attach the prepared end of the mask bag assemblytube (1) to the clear window end of the flow indicator (3). Slide the tubing on the open end of the flow indicator (3) until the mask bag assembly tube (1) end meets the shoulder of the flow indicator (3).

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### B/E AEROSPACE Service Bulletin

Page 5 of 7 CAUTION: WHILE PUTTING THE TUBE ON THE FLOW INDICATOR (3), D O NOT USE TOO

MUCH FORCE THAT MAY DAMAGE THE FLOW INDICATOR (3). NOTE: Momentarily dipping the tube (1) end into denatured alcohol or isopropyl alcohol

(commercially available) will make it easier to sli de the tube (1) on the flow indicator (3). (3) Use the Tubing Stretcher Tool part number 997300 -00 (refer to Figure 2) to expand the inside diameter of the end of the supply tube (4). CAUTION: DO NOT MAKE THE INSIDE DIAMETER OF THE SUPPLY TUBE (4) LARGER THAN

THE DIAMETER NEEDED TO PUT THE TUBE OVER THE OUTSID E OF THE FITTING OF THE NEW FLOW INDICATOR (3). DO NOT MAKE THE INSIDE DIAMETER OF THE SUPPLY TUBE (4) SO LARGE THAT THE T UBE SPLITS OR DISCOLORATION OF THE TUBE OCCURS. (4) Attach the prepared end of the supply tube (4) o n the end of the flow indicator (3) having the gree n marking. Slide the tubing on the open end of the fl ow indicator (3) until the supply tube (4) end meets the shoulder of the flow indicator (3). CAUTION: WHILE PUTTING THE TUBE ON THE FLOW INDICATOR (3), D O NOT USE TOO

MUCH FORCE THAT MAY DAMAGE THE FLOW INDICATOR (3). NOTE: Momentarily dipping the tube (4) end into denatured alcohol or isopropyl alcohol

(commercially available) will make it easier to sli de the tube (4) on the flow indicator (3). (5) After the tubes (1, 4) have contracted around th e flow indicator (3), make sure the tubes (1, 4) ar e tight on the flow indicator (3). (6) Once the new flow indicator (3) is installed in the assembly, write on the data label on the bag assembly with permanent ink. Write the letter "W" o n the right side of the data label approximately as shown in Figure 3.

Figure 2 Tubing Stretcher Tool PN 997300-00

## 174080-35-02

30 May 2008 Rev. 1, 13 Apr 2010 

### B/E AEROSPACE Service Bulletin

Page 6 of 7 Figure 3 Passenger Oxygen Mask D. Testing (refer to Figure 3) WARNING: IF THE NEW FLOW INDICATOR (3) IS INSTALLED BACKWARD S, THE FLOW

INDICATOR WILL NOT SHOW WHEN OXYGEN FLOWS TO THE MA SK. (1) Look for the directional arrow that has been sta mped on the side of the flow indicator (3) body. Th e flow directional arrow must point toward the oxygen mask bag assembly. (2) Make sure the directional arrow and markings arein green, showing that the replacement has been implemented. (3) Make sure the letter "W" is on the right side ofthe data label (approximate location is shown in Figure 3), showing that the replacement has been im plemented.

## 174080-35-02

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### B/E AEROSPACE Service Bulletin

Page 7 of 7 E. Cleaning WARNING: THE USE OF OIL AND OTHER PETROLEUM BASE LUBRICANTS ON OXYGEN

EQUIPMENT WILL CREATE A DANGEROUS FIRE HAZARD. CAUTION: THE WORK AREA MUST BE CLEAN AND FREE OF HYDROCARBON RESIDUE, OIL,

OR OTHER PETROLEUM BASE LUBRICANTS. CAUTION: DO NOT LET DENATURED ALCOHOL TOUCH THE MASK BAG AS IT MAY REMOVE

INK ON THE BAG. (1) Use a clean lint-free cloth moistened with denat ured alcohol to lightly wipe down the mask cup and tubing. Do not allow cleaning solution to enter tu be or reservoir bag. (2) Denatured alcohol can be used to remove stains o r contamination. (3) Allow the mask assembly to fully dry after clean ing. III. Material Information Table 2 Materials List

FIG. NO. ITEM NO. NEW PART NO. QTY DESCRIPTION OLD PART NO. INSTRUCTIONS/ DISPOSITION
2,3 1 MASK BAG ASSY TUBING 820502-00

820770-00 (174080-XX)

(174085-XX) (174095-XX) (174098-XX) REUSE

1,3 2 1 FLOW INDICATOR 118023-02 DISCARD 1,3 3 118023-12 1 FLOW INDICATOR NEW 2,3 4 SUPPLY TUBING 632080-12 820502-00 076112-00 (174080-XX)

(174085-XX) (174098-XX) (174095-XX) REUSE