Auxiliary Power Unit Starter Motor and Air Intake System Inspection/Cleaning
**** Hidden Message ***** 1/2<BR>EASA AIRWORTHINESS DIRECTIVE<BR>AD No.: 2006 - 0153 R1<BR><BR>Date: 27 November 2006<BR>No person may operate an aircraft to which an Airworthiness Directive applies, except in accordance with the<BR>requirements of that Airworthiness Directive unless otherwise agreed with the Authority of the State of Registry.<BR>Type Approval Holder’s Name:<BR>AIRBUS SAS<BR>Type/Model designations:<BR>A318, A319, A320 and A321 aircraft<BR>TCDS Number: EASA A.064<BR>Foreign AD: Not applicable.<BR>Revision/Supersedure: This AD revises and supersedes EASA AD 2006-0153 dated 30 May 2006.<BR>ATA 49 Auxiliary Power Unit (APU) - Starter Motor and Air Intake System –<BR>Inspection/Cleaning<BR>Manufacturer(s): AIRBUS, (formerly AIRBUS INDUSTRIE)<BR>Applicability: AIRBUS A318, A319, A320 and A321 aircraft, all certified models, all serial<BR>numbers, except :<BR>- aircraft equipped with APIC APS 3200 APU, that have received AIRBUS<BR>modification (mod) 35803 in production or AIRBUS service bulletin (SB)<BR>A320-49-1070 in service.<BR>- aircraft equipped with Honeywell 131-9A APU, that have received Mod<BR>35936 in production or SB A320-49-1075 in service.<BR>Reason: An operator reported black smoke at the rear of the fuselage during taxi after<BR>landing. The smoke was caused by a fire in the APU air intake.<BR>The analysis has demonstrated that following numerous unsuccessful APU<BR>start attempts in flight, there is a risk of reverse flow leading to flame<BR>propagation to the APU air inlet and air intake duct. If this zone is<BR>contaminated, a fire may be initiated.<BR>It is reminded that the Flight Crew Operating Manual (FCOM) limits the<BR>number of APU start attempts as follows:<BR>APU STARTER<BR>After 3 starter motor duty cycles, wait 60 minutes before attempting 3 more<BR>cycles.<BR>2/2<BR>AD 2006-0153 required repetitive inspections of the APU starter motor, APU<BR>inlet plenum and APU air intake as well as repetitive cleaning of the APU air<BR>intake.<BR>This AD has now been revised to reduce the applicability and to introduce an<BR>optional terminating action.<BR>The ‘Compliance section of this AD has been corrected to replace the quoted<BR>issue date of AD 2006-0153 with the effective date, as intended.<BR>Effective Date: 11 December 2006<BR>Compliance: 1. Within the next 600 flight hours (FH) after June 09, 2006 (effective date of<BR>AD 2006-0153), inspect the APU starter motor, APU air inlet plenum and<BR>APU air intake, and apply the necessary corrective actions in accordance<BR>with the instructions given in the Airbus SB A320-49-1068 revision 1;<BR>2. Thereafter, at intervals not exceeding 600 flight hours, repeat the<BR>inspection as required by paragraph 1. of this directive;<BR>3. Prior to accumulating 2,400 FH total time since new or within the next 600<BR>FH after June 09, 2006 (effective date of AD 2006-0153), whichever<BR>occurs later, unless already accomplished as per SB A320-49-1068 at<BR>original issue, clean the APU air intake in accordance with the instructions<BR>given in the SB A320-49-1068 revision 1.<BR>4. Thereafter, at intervals not exceeding 2,400 FH, repeat the cleaning task<BR>as required by paragraph 3. of this directive.<BR>After embodiment of SB A320-49-1070 in service on aircraft equipped with<BR>APIC APS 3200 APU, or SB A320-49-1075 in service on aircraft equipped<BR>with Honeywell 131-9A APU, the inspections and cleaning as described above<BR>are no longer required.<BR>Ref. Publications: AIRBUS Service Bulletin A320-49-1068 revision 1<BR>AIRBUS Service Bulletin A320-49-1070 original issue<BR>AIRBUS Service Bulletin A320-49-1075 original issue<BR>or later approved revisions.<BR>Remarks: 1. If requested and appropriately substantiated the responsible EASA<BR>manager for the related product has the authority to accept Alternative<BR>Method of Compliance (AMOCs) for this AD.<BR>2. The original issue of this AD was posted AS PAD 06-054 for consultation<BR>on 13 March with a comment period until 27 March 2006. The Comment<BR>Response Document can be found at http://ad.easa.europa.eu/ .<BR>3. Enquiries regarding this AD should be addressed to the AD Focal Point,<BR>Certification Directorate, EASA. E-mail ADs@easa.europa.eu .<BR>4. For any question concerning the technical content of the requirements in<BR>this AD, please contact AIRBUS - Fax 33 5 61 93 44 51.学习了
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