SERVICE INFORMATION LETTER

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TELEX AIRBU 530526F SERVICE INFORMATION LETTER SIL NUMBER: 23-026 PAGE: 1 of 7 DATE: Sep 08/1998 REVISION: 04, Oct 01/2007 SUBJECT: ATA CHAPTER: AIRCRAFT TYPE: APPLICABILITY: 1. PURPOSE: Electro Magnetic Interference (EMI) caused by In Flight Entertainment (IFE) systems A320 Family & A330/A340 Family All Airbus has identified on A320Family & A330/A340 Family production aircraft, possible Electro Magnetic Interferences (EMI) affecting 8.33 and/or 25 kHz VHF operation. This SIL gives for each IFE system tested, the VHF frequency channel (8.33 and/or 25kHz) at which the EMI was observed with all passengers doors closed (flight condition), the position of the affected VHF, the observation regarding the VHF behaviour when EMI is present. For each system, the improved units are also listed whenever available. 23 0. REVISION : Update of list of VHF transceivers position affected by EMI due to Panasonic 2000E and THALES Top series i4000 systems AIRBUS SERVICE INFORMATION LETTER SIL NUMBER: 23-026 PAGE: 2 of 7 DATE: Sep 08/1998 REVISION: 04, Oct 01/2007 Note : The discovery of EMI on given VHF channels, during Airbus testing does not mean that in service airplanes will necessarily have interference on the same VHF channels.. 2.1 Panasonic System MPES VHF frequency channel VHF affected Observation 132.525 1 Background noise Solution: Panasonic developed new equipments (Main Multiplexer, SEB, PES harness) in order to address the EMI interference which affect the VHF at the frequency 132.525 Mhz: - MMUX PN RDAX1301-5A - SEB PN RDAX4432-01 - Seat to seat harness PN RDAM7933-xx - WDB to seat harness PN RDAM7934-xx 2.2 Panasonic System eFX VHF frequency channel VHF affected Observation 122.875 1/2/3 Squelch opens or does not close Investigations are undergoing at Panasonic both in laboratory and on the aircraft to determine the faulty equipment and launch corrective actions. 2.3 Rockwell Collins APAX130 No EMI has been observed 2.4 Rockwell Collins P@ves No EMI has been observed 2. A320 Family aircraft AIRBUS SERVICE INFORMATION LETTER SIL NUMBER: 23-026 PAGE: 3 of 7 DATE: Sep 08/1998 REVISION: 04, Oct 01/2007 2.5 Thales Top Series i4000 components VHF frequency channel VHF affected Observation 124.925 1/3 Squelch opens or does not close 124.925 2 Background noise 124.930 1/3 Squelch opens or does not close 124.930 2 Background noise 125.990 1/2 Background noise 135.160 1/2/3 Background noise Investigations are undergoing at Thales to determine the faulty equipment and launch corrective actions. 3. A330/A340 Family aircraft Note : The discovery of EMI on given VHF channels, during Airbus testing does not mean that in service airplanes will necessarily have interference on the same VHF channels. 3.1 Panasonic System 2000 (PESC PN RDAA1001-XX and associated units) VHF frequency channel VHF affected Observation 119.700 1 Background noise 135.475 1/3 Background noise 135.480 1 Background noise Solution : The 3 channels are cleared of any EMI with the following improved unit PNs made available by Panasonic. For newly defined versions, these units equip Airbus A/C with System 2000 from the production line. This has been confirmed by tests performed on A/C with all doors closed as well as with door 1LH opened. EMI improved PESC : PN RD-AA1001-05 and subsequent. EMI improved VSCU : PN RD-AA5001-07 and subsequent EMI improved ASEB : PN RD-AA4304-51 EMI improved VASEB : PN RD-AA4502-45 AIRBUS SERVICE INFORMATION LETTER SIL NUMBER: 23-026 PAGE: 4 of 7 DATE: Sep 08/1998 REVISION: 04, Oct 01/2007 3.2 Panasonic System 2000E (EPESC RDAA1003-XX and associated units) with system 2000 components in Y/C seats VHF frequency channel VHF affected Observation 119.700 1/2/3 Background noise 119.705 1/2/3 Squelch opens or does not close 121.650 1/2/3 Background noise or squelch opens 121.655 1/2/3 Squelch opens or does not close 123.490 1/2/3 Squelch opens or does not close 123.500 1/2/3 Squelch opens or does not close 123.505 1/3 Squelch does not close 125.235 1 Squelch does not close 125.335 1/2/3 Squelch does not close 125.340 1/2/3 Squelch opens or does not close 126.650 1/2 Squelch does not close 127.175 1/2/3 Background noise or squelch does not close 127.180 2 Background noise 127.185 1/2/3 Squelch does not close 130.635 1/2/3 Background noise or squelch does not close 131,075 1/2/3 Squelch opens immediately and does not close 132.710 1/2/3 Background noise or squelch does not close 135.475 1/3 Background noise or squelch does not close 135.480 1/2/3 Squelch opens or does not close 135.485 1 Background noise 136.385 2 Background noise 136.390 2 Squelch does not close 136.400 1/2/3 Background noise 136.405 1/3 Squelch does not close AIRBUS SERVICE INFORMATION LETTER SIL NUMBER: 23-026 PAGE: 5 of 7 DATE: Sep 08/1998 REVISION: 04, Oct 01/2007 Solution : All above channels are cleared of any EMI with the following improved unit PNs made available by Panasonic. These units equip any new Airbus A/C with System 2000E from production line. This has been confirmed by tests performed on A/C with all doors closed as well as with door 1LH opened. EMI improved EPESC : PN RD-AA1007-03 EMI improved EVSCU : PN RD-AA5007-13 EMI improved ASEB : PN RD-AA4304-51 EMI improved VASEB : PN RD-AA4502-45 EMI improved IVASEB : PN RD-AA4xx2-1x EMI improved EADB : PN RD-AA2013-xx These units are available since September 1998. 3-2-1 Retrofit : For already delivered A/C, retrofit plan is to be agreed with Panasonic However should a customer be affected by any of these EMI, they are advised to change the (E)PESC and (E)VSCU as a first step. Should EMI remain on some frequencies they can then agree with Panasonic the best way to proceed with rest of the units 3.3 Panasonic System 2000E Standard Interface Units (EPESC RDAA1007-XX and associated units) - No EMI has been observed. 3.4 Panasonic System 3000 (I) VHF frequency channel VHF affected Observation 133.335 1 Squelch breaks 122.865 1 Squelch breaks or hangs Solution: It may happen that those disturbances are observed with doors closed. The CMT panel PN RD-AA8046- 11 included in the VCC is the source of the disturbances which are also dependent on other factors (i.e. location of the VCC, wiring, VHF receiver, etc). Newly introduced CMT PN RD-AA8046-32 clearly improves the EMI situation. AIRBUS SERVICE INFORMATION LETTER SIL NUMBER: 23-026 PAGE: 6 of 7 DATE: Sep 08/1998 REVISION: 04, Oct 01/2007 3.5 Rockwell Collins APAX 150(i) No EMI has been observed 3.6 Rockwell Collins Total Entertainment System (TES) No EMI has been observed 3.7 Rockwell Collins Enhanced Entertainment System (eTES) No EMI has been observed 3.8 SONY P@ssport system - No EMI has been observed. 3.9 Thales Top Series i4000 - No EMI has been observed. 3.10 Thales Top Series i5000 - No EMI has been observed. 4. RECOMMENDATIONS: Should any customer encounter EMI due to the IFE system, on any VHF channel once the 8.33 KHz channel spacing is activated on their airplane, they are invited to report their findings to Airbus Customer Services Engineering (SEE61 ). In case that EMI are experienced with door closed (flight conditions), refer to FCOM 3.04.23. In addition, the following TSM tasks have been revised - A320Family TSM task 23-12-00-810-827 (May 01/06 revision) - Loss of one or more VHF transmission or Reception functions / channels - A330/A340 Family TSM task 23-12-00-810-819 (Jul 01/06 revision) - Loss of one or more VHF transmission or Reception functions / channels They mention the following note: Note: “Electro Magnetic Interferences from the Passenger Entertainment| System (PES) can cause the perturbation in reception of one or more VHF Channels. Refer to SIL 23-026.” AIRBUS SERVICE INFORMATION LETTER SIL NUMBER: 23-026 PAGE: 7 of 7 DATE: Sep 08/1998 REVISION: 04, Oct 01/2007 Appendix ASEB Audio Seat Electronic Box EADB Enhanced Area Distribution Box EPESC Enhanced Passenger Entertainment System Controller EVSCU Enhanced Video System Control Unit IVASEB Interactive Video Audio Seat Electronic Box MMUX Main Multiplexer PESC Passenger Entertainment System Controller SEB Seat Electronics Box VASEB Video Audio Seat Electronic Box VSCU Video System Control Unit WDB Wall Disconnect Box

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SERVICE INFORMATION LETTER