European Aviation Safety Agency

ATA 71 - Powerplant - Forward Engine Mount - Inspection
 N AD 2015-0038R1

Annotation

Reason:

During a A320 Extended Service Goal (ESG) residual fatigue test, in which new loads were used, taking into account the results of the 2006 fleet survey, the CFM56-5A/5B forward engine mount experienced a failure before reaching the threshold/interval for the detailed inspection of that forward engine mount, as identified in Airbus A318/A319/A320/A321 Airworthiness Limitations Section (ALS) Part 2 (hereafter referred to in this AD as ‘the ALS’) task 712111-01. In case of total loss of the primary load path, the current maintenance requirements do not ensure the design integrity of the remaining structure.

This condition, if not corrected, could lead to in-flight loss of an engine, possibly resulting in reduced control of the aeroplane and injury to persons on the ground.

For the reasons described above, EASA issued AD 2015-0038, requiring implementation of a reduced threshold and interval for the detailed inspections (DET) of the forward engine mount on both right hand (RH) and left hand (LH) sides, as specified in the ALS, task 712111-01.

Since that AD was issued, it was determined that the repetitive inspection interval may be extended for A318, A319 and A320 aeroplanes.

This AD is revised to amend the repetitive inspection interval accordingly.

Автоматический перевод:

ATA 71 - электростанция - прямая подвеска двигателя - проверка