Airbus Alert Operators Transmission A26P004-18

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AD 2018-18-04Fire Protection · Airbus A350-1041 and A350-941Effective Sep 14, 2018 · No revision named

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Page 1Open in PDF

CUSTOMER SERVICES DIRECTORATE 1 ROND POINT MAURICE BELLONTE 31707 BLAGNAC CEDEX FRANCE TELEPHONE + 33 (0)5 61 93 33 33

ALERT OPERATORS TRANSMISSION - AOT AOT ref: A26P004-18 Rev 00 Page 1 of 6 Date: 26-JUN-2018 © AIRBUS S.A.S. 2018. ALL RIGHTS RESERVED. CONFIDENTIAL AND PROPRIETARY DOCUMENT SUBJECT: ATA 26 – Protective caps found installed on Engine Fire Extinguishing pipes AIRCRAFT TYPE: A350 OUR REF.: A26P004-18 Rev 00 dated 26-JUN-2018

1. AIRCRAFT AFFECTED A350 in-service A/C as listed:

00005,00006,00007,00008,00009,00010,00011,00012,00013,00014,00015,00016,00017,00018,00019, 00020,00021,00022,00023,00024,00025,00026,00027,00028,00029,00030,00031,00032,00033,00034, 00035,00036,00037,00038,00039,00040,00041,00042,00043,00044,00045,00046,00047,00048,00049, 00050,00051,00053,00054,00056,00057,00058,00061,00062,00063,00064,00066,00067,00068,00069, 00070,00072,00073,00074,00075,00076,00077,00078,00079,00080,00081,00082,00083,00084,00085, 00086,00087,00088,00089,00090,00091,00092,00093,00094,00095,00096,00097,00099,00101,00103, 00104,00105,00107,00109,00111,00113,00115,00116,00117,00119,00120,00121,00122,00123,00124, 00127,00128,00129,00130,00132,00133,00134,00135,00136,00137,00138,00140,00142,00144,00145, 00146,00147,00148,00149,00150,00151,00153,00154,00155,00157,00158,00159,00160,00162,00164, 00165,00168,00170,00173,00174,00175,00176,00177,00179,00180,00181,00184,00186

2. REFERENCED DOCUMENTATION

2.1 APPENDIX None

2.2 REFERENCES Ref 1.: MP Task A350-A-26-21-XX-00001-340A-A Functional Check of the Engine Fire Extinguishing System (FES) Distribution-Line for Leakage or Blockage

3. REASON The purpose of this AOT is to advise A350 operators about findings on Engine Fire Extinguishing pipes, and to request one time inspection of the pipes and removal of protective caps in case of finding.

3.1 FACTS Before delivery, on two different aircraft the following was observed:

On the first aircraft at Engine level, in the Engine Core zone, 2 black protective caps were found on the Fire Extinguishing pipe.

Page 2Open in PDF

ALERT OPERATORS TRANSMISSION - AOT AOT ref: A26P004-18 Rev 00 Page 2 of 6 Date: 26-JUN-2018 © AIRBUS S.A.S. 2018. ALL RIGHTS RESERVED. CONFIDENTIAL AND PROPRIETARY DOCUMENT Fig. 1: Engine Location of black protective caps findings On each engine, 3 black caps are installed by Rolls Royce, as engine manufacturer and should be removed during aircraft final assembly.

On the second aircraft, one red cap was found on the Fire Extinguishing pipe installed below the pylon in Engine Fan case zone.

Fig. 2: Location of red protective caps findings in Engine Fan case zone In this area on each engine, 4 Red caps are installed by Airbus and should be removed during aircraft final assembly.

3.2 CONSEQUENCES In case of an Engine Fire, the efficiency of the fire extinguishing cannot be confirmed. Indeed there is no confirmation that the cap would be ejected at engine fire extinguishing agent discharge.

3.3 AIM The aim of this AOT is to recommend the inspection of ENG 1 and ENG 2 Fire Extinguishing pipes in engine core zone and in engine fan case zone. All caps that would have been left installed should be removed.

Page 3Open in PDF

4. SHORT TERM ACTION

4.1 PLANNING AND MANPOWER

4.1.1 ACCOMPLISHMENT TIMESCALE Within 4 months after reception of this AOT, and at the first opportunity, perform the procedure described in paragraph 4.2.

4.1.2 MANPOWER The estimated time to perform the inspection as per paragraph 4.2 is 1 MH per Engine including access.

4.2 DESCRIPTION

4.2.1 ACCESS Get access to inspection area as per paragraph 3 – Job set-up of Ref 1. MP Task.

After inspection, perform:

1/ SUBTASK 2621XX-86500130001 of Ref 1. MP task to normalize the circuit breakers 2/ Close up procedure as per paragraph 5 – Close up of Ref 1. MP task.

4.2.2 INSPECTION REQUIREMENTS For each engine, perform the visual inspection of the fire extinguishing pipe in Engine core zone and in engine fan case zone.

Fig 3.: Engine nozzles location

- 3 positions in each engine core zone (Zone 3 in terms of Rolls Royce naming of ventilation zone)

Page 4Open in PDF

- 4 positions in each pylon Fig 5.: Engine Fan case zone

Page 5Open in PDF

ALERT OPERATORS TRANSMISSION - AOT AOT ref: A26P004-18 Rev 00 Page 5 of 6 Date: 26-JUN-2018 © AIRBUS S.A.S. 2018. ALL RIGHTS RESERVED. CONFIDENTIAL AND PROPRIETARY DOCUMENT Fig 6.: Picture of the Engine Fan case zone red caps location

4.2.3 FINDINGS For each engine, in the Engine Core zone, if caps are found installed on the Fire Extinguishing pipe, remove the caps.

For each engine, in the Engine Fan case zone, if caps are found installed on the Fire Extinguishing pipe, remove the caps.

If a melted cap deposit is found on the external diameter of the pipe exit:

Clean with a thin metal brush If deposit is found on the internal diameter of the pipe exit:

Clean with abrasive material such as “emery cloth”. Movements have to be performed such as potential deposits go outside of the pipe.

4.3 SPARES AND TOOLING Reference QTY DESIGNATION 98V27801000000 1 CONTROL LEVER FLAP SLAT No Specific AR WARNING NOTICE(S) No Specific 1 ACCESS PLATFORM 4M (13 FT)-ADJUSTABLE No Specific 1 ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE

5. FURTHER INFORMATION

5.1 FOLLOW-UP PLAN

Page 6Open in PDF

5.2 IMPACTED DOCUMENTATION N/A

6. AOT APPROVAL The technical content of this document is approved under the authority of DOA nr. EASA.21J.031.

7. REPORTING Questions about this AOT are to be addressed to Airbus Customer Services through TechRequest on Airbus World, selecting Maintenance & Engineering Domain, Engineering Support Section and ATA

26-21.

As per latest reporting policy (Ref to OIT 999.0018/16), inspection results (with or without findings) are to be addressed to Airbus Customer Services through the generic e-mail address:

inspection.results@airbus.com.

This report shall contain result for each engine and each position inside the engine using the following format:

ENG1 – Fan case zone:

Number of plugs found and removed over the 4 points inspected :

ENG1 : Core zone Number of plugs found and removed over the 3 points inspected :

ENG2 : Fan case zone Number of plugs found and removed over the 4 points inspected :

ENG1 : Core zone Number of plugs found and removed over the 3 points inspected :

Pictures can be attached.

Best Regards, Jean-Luc MOUYSSET

VICE PRESIDENT ENGINEERING SUPPORT

CUSTOMER SERVICES Stéphane GOSSELIN VICE PRESIDENT A350 PROGRAMME