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ZODIAC SERVICES
DATE: 20110623 SERVICE BULLETIN: MXH-35-241 PAGE: 1/2
ZODIAC SERVICES Technical Publication Department 7, avenue du PARANA BP 303 91958 COURTABOEUF CEDEX FRANCE.
Phone international : + 33 1 64 86 69 59 Fax international : + 33 1 64 86 69 84 TPI Web site: http://tpi.services.zodiacaerospace.com/technical/tpi
TRANSMITTAL SHEET
This Transmittal Sheet applies to the Revision 03, dated 20110623, of Service Bulletin MXH-35-241
REASON FOR REVISION
- Typo Errors corrected
- Flow chart updated (Alternative boxes added)
- Inner leakage test added (Applicable to MRA Series)
- Appendix II updated (adding of new PNR in Appendix II (Red PNR))
- Appendix III changed (New Appendix)
- Appendix IV changed (Old Appendix III)
- Appendix V added (Old Appendix IV)
REVISION SEQUENCE
Initial issue : 20110406 Revision 01: 20110510 Revision 02: 20110519 Revision 03: 20110623
SERVICE BULLETIN
DATE: 20110623 SERVICE BULLETIN: MXH-35-241 PAGE: 2/2
THIS PAGE INTENTIONALLY LEFT BLANK
INTERTECHNIQUE
AIRCRAFT SYSTEMS OXYGEN AND LIFE SUPPORT DEPT.
61, RUE PIERRE CURIE - BOITE POSTALE N° 1 78373 PLAISIR CEDEX - FRANCE Phone : (33) 01 61 34 23 23 - Fax : (33) 01 30 55 71 61
SERVICE BULLETIN
DATE: 20110623 SERVICE BULLETIN: MXH-35-241 REVISION N°: 3 PAGE: 1/14
TITLE: OXYGEN – HARNESS ASSEMBLY - INSPECTION FOR POTENTIAL
DEFECTIVE COMPONENT
1. PLANNING INFORMATION A. Effectivity
(1) Concerned equipment This Service Bulletin applies to the infl atable harness PNR MXH Series manufactured between 50 th week of 2008 year (0850S) and 31 th week of 2010 year (1031S) for the batches listed in Appendix I.
These inflatable harness assemblies have been used for the manufacturing of new masks (See Appendix II), and have been sold as spare parts from 15-dec-2008 to 31-dec-2010, for the maintenance of masks already in service.
Inflatable harness PNR MXH Series manufactured before 33rd week of 2008 year (0833S) are not marked with any batch number and are not concerned.
Inflatable harness PNR MXH Series manufactured between 33 rd week of 2008 year (0833S) and 49th week of 2008 year (0849S) are marked with a batch number and are not concerned.
(2) In the field Full Face Quick Donning Mask Regulator (MF10 Series, MF20 Series), Crew Oxygen Mask Regulator (MC10 Series, MC20 Series, MRA Series) and Oxygen Mask Regulator / With Detachable goggles (MLD20 Series) Installed on Bombardier Aircrafts and equipped with potentially defective inflatable harness.
(3) Spare parts Defective inflatable harness from stock.
B. Concurrent Requirements Affected customers should notify their usual Zodiac Se rvices contacts in regards of their location (ZS Europe, ZS UK, ZS Middle East, ZS Asia and ZS Americas).
Customers to provide the list of PNR and SER affected and place the corresponding orders for replacement.
Removed harnesses must be sent in one batch at the end of the retrofit to the ZS work shop from which your area corresponds to.
C. Reason This Service Bulletin is issued :
- To inform the operators of the potential risk of rupture on the inflatable harness.
- To provide instructions for inspection and prev entive replacement if necessary of potentially defective inflatable harness.
SERVICE BULLETIN
DATE: 20110623 SERVICE BULLETIN: MXH-35-241 REVISION N°: 3 PAGE: 2/17
D. Description Based on our internal review and customer feedback, INTERTECHNIQU E has identified the potentially defective batches of silicon tubes.
Inflatable harnesses assembled with defective silicon tubes have demonstrated an unusually high premature rupture rate.
E. Compliance Incorporation of this Service Bulletin is mandat ory (refer to EASA Airworthiness Directive AD No.: 2011-0090) within 24 months of AD effectivity date.
F. Approval The technical content of this Service Bulle tin has been reviewed and accepted by Bombardier Aerospace.
G. Manpower
(1) 1 technician
(2) Check only : 5 minutes.
(3) Complete Operation : 15 minutes.
H. Weight and Balance None I. Electrical Load Data Not Changed J. Software Accomplishment Summary Not applicable K. References
(1) Component Maintenance Manuals See APPENDIX IV
(2) Airworthiness Directive AD No.: 2011-0090 L. Publications Affected
(1) Component Maintenance Manuals See APPENDIX IV M. Interchangeability Not affected
SERVICE BULLETIN
DATE: 20110623 SERVICE BULLETIN: MXH-35-241 REVISION N°: 3 PAGE: 3/17
2. MATERIAL INFORMATION A. Material – Price and Availability
(1) Material
PNR KEYWORD QTY UNIT PRICE (USD) MXHA200 HARNESS 1 FOC MXH15-2 HARNESS 1 Obsolete * MXH15-22 HARNESS 1 FOC MXH16 HARNESS 1 Obsolete * MXH16-20 HARNESS 1 FOC MXH30 HARNESS 1 Obsolete * MXH30-20 HARNESS 1 FOC MXH30-20G HARNESS 1 FOC MXH61G HARNESS 1 FOC MXH64G HARNESS 1 FOC MXH74G HARNESS 1 Obsolete * MXH74-20G HARNESS 1 FOC *Inflatable harness MXH15-2, MXH16, MXH30, MXH33 and MXH74G are obsolete due to following Service Bullletins:
PNR Service Bulletin MF20-506 MF20-35-26 MC10-13-03, MC10-35-101 MC10/MF10-35-141 MF10-08-01 MC10 Series MA/B/C/F10-35-144 MF10 Series
(2) Price Not applicable
(3) Availability 15 days after receipt of order from March 1, 2011.
B. Industry Support Information Not applicable C. Material Necessary for Each Component (Unit)
(1) Material to order
SERVICE BULLETIN
DATE: 20110623 SERVICE BULLETIN: MXH-35-241 REVISION N°: 3 PAGE: 4/17
PNR KEYWORD QTY ORDER SPECIAL INSTRUCTIONS MXHA200 HARNESS 1 MXHA200 Forward to Zodiac Services maintenance facility* MXH15-2 HARNESS 1 MXH15-22 Forward to Zodiac Services maintenance facility* MXH15-22 HARNESS 1 MXH15-22 Forward to Zodiac Services maintenance facility* MXH16 HARNESS 1 MXH16-20 Forward to Zodiac Services maintenance facility* MXH16-20 HARNESS 1 MXH16-20 Forward to Zodiac Services maintenance facility* MXH30 HARNESS 1 MXH30-20 Forward to Zodiac Services maintenance facility* MXH30-20 HARNESS 1 MXH30-20 Forward to Zodiac Services maintenance facility* MXH30-20G HARNESS 1 MXH30-20G Forward to Zodiac Services maintenance facility* MXH61G HARNESS 1 MXH61G Forward to Zodiac Services maintenance facility* MXH64G HARNESS 1 MXH64G Forward to Zodiac Services maintenance facility* MXH74G HARNESS 1 MXH74-20G Forward to Zodiac Services maintenance facility* MXH74-20G HARNESS 1 MXH74-20G Forward to Zodiac Services maintenance facility* * Refer to § 3.D D. Material necessary for each spare Not applicable E. Re-identified Parts
(1) With indelible ink, write visibly the SB a ccomplishment by adding on the name plate of letter “I“ (Inspected) at the end of SER (See Figure 1).
(2) With indelible ink or an electric pen, write visibly the SB accomplishment by adding of letter “I“ (Inspected) on the bushing of inflatable harness (See Figure 2).
The marking shall be visible once the harness has been re-installed on the mask.
F. Tooling – Price and Availability Not applicable
3. ACCOMPLISHMENT INSTRUCTIONS A. From the stock :
(1) Inspect the manufacturing date and the batch number (See Figure 3) of the inflatable harness:
- If the batch number is found in the list of Appendix I, forward the defective inflatable harness to the appropriate Zodiac Services maintenanc e facility for replacement of the inflatable harness.
B. Inflatable harness mounted on t he Crew Oxygen Mask Regulator :
WARNING : STRICTLY OBEY THE PROCEDURES WHEN YOU DO WORK ON OXYGEN SYSTEM.
DO NOT USE OIL, GREASE OR OTHER LUBR ICANTS MADE FROM PETROL IN THE AREA OF OXYGEN EQUIPMENT. YOU CAN CAUSE A FIRE OR EXPLOSION.
CAUTION : APPLY THIS SB ON CLEAN SURFACE AND WITH CLEAN HANDS.
Prior to using the flow chart to start the on-aircraft action(s), the operator, if he has the possibility, can determine, (e.g. aircraft maintenance logs check) whether the inflatable harness has been replaced, during a maintenance operation, on an oxygen mask regulator installed on the aircraft.
SERVICE BULLETIN
DATE: 20110623 SERVICE BULLETIN: MXH-35-241 REVISION N°: 3 PAGE: 5/17
Batch number included in the list of appendix I Stow the Crew Oxygen Mask into its housing Remove the inflatable harness from the Crew Oxygen Mask (Refer to § 3.B.(1)) Inspect the harness manufacturing date Inspect the batch number (Refer to Figure 3) Replace the inflatable harness Add the letter ” I” on the bushing of inflatable harness and at the end of the SER (Refer to § 2.E) Re-Install the inflatable harness to the Crew Oxygen Mask § (3.B.(2)) Make the test of the Crew Oxygen Mask (Refer to § 3.B.(3)) No Disconnect the Crew Oxygen Mask from the A/C oxygen supply source Connect the Crew Oxygen Mask to the A/C oxygen supply source, if disconnected.
Yes No No Yes Forward the defective inflatable harness to the appropriate Zodiac Services maintenance facility for replacement.
(Refer to § 3.D) SER of the Crew Oxygen Mask included in the list of Appendix II or Appendix III Crew oxygen mask has been repaired and harness changed between 50th week of 2008 and 8th week of 2011 Manufacturing date is between 0850S and 1031S Yes Inspect the SER of the Crew Oxygen Mask (Refer to Figure 1) Inspect the manufacturing date (DMF) of the Crew Oxygen Mask (Refer to Figure 1) Manufacturing date ≥ 01st month of 2011 year (012011) No No If applicable: Add the Amdt letter to the identification plate of the Crew Oxygen Mask (Refer to § 3.C and Figure 1) unstow the Crew Oxygen Mask from its housing Start End Yes or unknown No Inspect the harness manufacturing date Disconnect the Crew Oxygen Mask from the A/C oxygen supply source Remove the inflatable harness from the Crew Oxygen Mask (Refer to § 3.B.(1)) Yes Letter " I " marked on the bushing of inflatable harness or at the end of SER of the Crew Oxygen Mask Inspect the letter ”I” on the bushing of inflatable harness or at the end of SER of the Crew Oxygen Mask (Refer to Figure 2) Yes No
Action to be performed on Aircraft Action to be performed on aircraft or certified PART 145 workshop
SERVICE BULLETIN
DATE: 20110623 SERVICE BULLETIN: MXH-35-241 REVISION N°: 3 PAGE: 6/17
(1) Removal of the inflatable harness from the Crew Oxygen Mask Regulator:
(a) Applicable to MC10, MC20 MF10, MF20 and MLC/MLD20 Series 1 Remove the screw from the inflatable harness with magnetic-screwdriver slotted (3x_ _).
2 Lift the locking tab of the coupling block whic h is in front of the regulator by 1 to 2 mm (0.04 to 0.08 in).
3 Hold the locking tab up and move the coupling block apart from the regulator.
NOTE: Be careful not to remove the seal PNR 437276.
(b) Applicable to MRA Series WARNING: THE REMOVAL OPERATION MUST BE PERFORMED IN CERTIFIED PART 145 WORKSHOP.
1 Remove the mask (Refer to CMM 35-17-15 Subtask 35-17-15-020-001-A01) 2 Remove the harness (Refer to CMM 35-17-15 Subtask 35-17-15-020-002-A01)
(2) Installation of the inflatable harne ss to the Crew Oxygen Mask Regulator:
(a) Applicable to MC10, MC20, MF10, MF20 and MLC/MLD20 Series WARNING: MAKE SURE THAT THE SEAL P NR 437276 IS CORRECTLY INSTALLED IN ITS HOUSING.
1 Install the harness on the regulator body and attach it with the screw.
2 Torque the harness attachment screw 0,20 N.m ± 0,02 (1.77 lb.in ± 0.17).
(b) Applicable to MRA Series WARNING: THE INSTALLATION OPERATIO N MUST BE PERFORMED IN CERTIFIED PART 145 WORKSHOP.
1 Install the harness (Refer to CMM 35-17-15 Subtask 35-17-15-420-006-A01) 2 Install the mask (Refer to CMM 35-17-15 Subtask 35-17-15-420-007-A01)
SERVICE BULLETIN
DATE: 20110623 SERVICE BULLETIN: MXH-35-241 REVISION N°: 3 PAGE: 7/17
(3) Test of the Oxygen Crew Mask
(a) Test of the time to inflate the inflatable harness:
1 Connect the Crew Oxygen Mask Regulat or to the oxygen supply source.
2 Make the oxygen supply pressure stable:
On aircraft: Use the O2 pressure system.
In workshop: Refer to the relevant CMM.
3 Push the harness inflation plate.
a Make sure that the harness is fully inflated in one second maximum.
b Make sure that there is no noticeable leakage.
(b) Apply a drop of leak test solution (SHERLOCK Type 1 or equivalent as per MIL-PRF25567) to the inflatable harness.
1 Make sure that there is no leak betw een the regulator and the inflatable harness.
(c) Make the test of mask regulator inner leakage (Applicable to MRA SERIES).
1 (Refer to CMM 35-17-15 Subtask 35-17-15-790-001-A01).
C. Re-identification After modification of inflatable harness MXH15- 2, MXH16, MXH30, MXH33 or MXH74G by inflatable harness MXH15-22, MXH16-20, MXH30-20 or MXH74-20G:
- The Crew Oxygen Mask Regulators MC10 Series are identified with the amendment letter S,
- The Full Face Quick Donning Mask Regulators MF 10 Series are identified with the amendment letter T,
- The Full Face Quick Donning Mask Regulators MF20 Series (Except MF20-107) are identified with the amendment letter M,
(1) With indelible ink, write the relevant am endment letter or the new PNR on the identification label.
D. Declaration of Modification The form attached in appendix V is to be filled by the customer and attach to the PO.
SERVICE BULLETIN
DATE: 20110623 SERVICE BULLETIN: MXH-35-241 REVISION N°: 3 PAGE: 8/17
Figure 1 – Serial Number Position
Figure 2 – “ I “ Letter Position “DMF” Manufacturing date :
eg : 102010 = 10th Month of 2010 SER : Serial Number AMD Amendment Serial Number Changement eg : 150425 = 150425I Possible format of the manufacturing date:
102010 = 10th Month of 2010 1010 = 10 th Month of 2010
SERVICE BULLETIN
DATE: 20110623 SERVICE BULLETIN: MXH-35-241 REVISION N°: 3 PAGE: 9/17
Figure 3 – Manufacturing Date Explanation & Batch Number Position Batch Number eg. : 0846Z10 Manufacturing Date Year Week eg.: 0912 = 12th week of 2009 Manufacturing Date Year Week eg.: 1012 = 12th week of 2010 Batch Number eg. : 0942Z1
SERVICE BULLETIN
DATE: 20110623 SERVICE BULLETIN: MXH-35-241 REVISION N°: 3 PAGE: 10/17
E. ZODIAC SERVICES Facilities
EUROPE MIDDLE EAST
ZODIAC SERVICES EUROPE 7, avenue du Parana BP 303 91958 COURTABOEUF CEDEX / FRANCE Phone : +33 1 64 86 69 69 Fax : +33 1 64 86 69 87 ZODIAC AEROSPACE U.K.
Unit 9, Blackwell drive Spring Wood Industrial estate BRAINTREE - ESSEX CM7,
ENGLAND Phone: 44 (0)-1376-329-194 Fax: 44 (0)-1376-340-734
IN-SERVICES MIDDLE EAST Abu Dhabi International Airport Cargo Village Area P.O. Box No 106675
ABU DHABI - UNITED ARAB
EMIRATES Phone : + 971 2575 7088 Fax : + 971 2575 8482
USA ASIA
ZODIAC SERVICES AMERICAS 4900 St. Joe Boulevard, Building 200, Suite 400 COLLEGE PARK, GA 30337 USA Phone : +1 678 228 8153 Fax : +1 800 879 0411
ZODIAC SERVICES ASIA 36, Loyang Drive SINGAPORE 508949 Phone : +65 6579 2230 Fax : +65 6579 2231
APPENDIX I
PNR Batches MXHA200 0849Z12 / 0850Z12 / 0851Z14 / 0852Z14 / 0901Z14 (or 091Z14) / 0902Z14 (or 092Z14) 0902Z15 (or 092Z15) / 0903Z15 (or 093Z15 ) / 0904Z15 (or 094Z15) / 0905Z15 (or 095Z15) 0906Z15 (or 096Z15) / 0939Z2 MXH15-2 0845Z10 / 0846Z10 / 0847Z10 / 0847Z11 / 0849Z12 / 0901Z14 (or 091Z14) / 0902Z14 (or 092Z14) / 0902Z15 (or 092Z15) / 0903Z15 (or 093Z15) / 0904Z15 (or 094Z15) / 0905Z15 (or 095Z15) / 0919Z15 / 0920Z15 / 0939Z2 MXH15-22 0846Z10 / 0847Z10 / 0849Z12 / 0901Z14 (or 091Z14) / 0902Z14 (or 092Z14) / 0903Z15 (or 093Z15) / 0904Z15 (or 094Z15) / 0905Z15 (or 095Z15) / 0915Z15 / 0919Z15 0920Z15 / 0939Z2 MXH16 0841Z14 / 0849Z13 / 0850Z14 / 0851Z14 / 0852Z14 / 0902Z14 (or 092Z14) / 0902Z15 (or 092Z15) / 0903Z15 (or 093Z15) / 0904Z15 (or 094Z15) / 0905Z15 (or 095Z15) / 0906Z15 (or 096Z15) / 0939Z2 MXH16-20 0851Z14 / 0906Z15 (or 096Z15) MXH30 0849Z13 / 0850Z9-1 / 0850Z12 / 0850Z14 / 0851Z14 / 0852Z14 / 0903Z14 (or 093Z14) / 0903Z15 (or 093Z15) / 0904Z15 (or 094Z15) / 0939Z2 MXH30-20 0851Z14 / 0852Z14 / 0904Z15 (or 094Z15) MXH30-20G 0851Z9-11 / 0852Z9-15 MXH61G 0849Z8-2 / 0850Z9-1 / 0850Z9-6 / 0939Z2-8