Thu, Nov 16, 2006
Applicability:
EC 130 B4 helicopters, all serial numbers, modified in accordance
with MOD 073774 (Installation of screws/nuts in place of the
attachments of the lower fairings with “blind” nuts)
and not embodying Eurocopter drawing 350A085340.
Requirement:
1. For affected EC 130 B4 helicopters not modified in accordance
with Eurocopter drawing 350A085342 - Check the condition of the
electrical harnesses and the attachment, carry out the corrective
actions if necessary and protect the electrical harnesses in
accordance with the instructions described in paragraphs 2.B.1
through 2.B.3 (corresponding to Eurocopter drawing 350A085342) and
2.B.5 of Emergency Alert Service Bulletin (ASB) 88A001 dated 10
November 2006 or later approved version.
2. Check the condition of the electrical harnesses, carry out
the corrective actions and install the clamp blocks in accordance
with the instructions described in paragraphs 2.B.1, 2.B.2.a, 2.B.4
(corresponding to Eurocopter drawing 350A085340) and 2.B.5 of ASB
88A001 or later approved version.
Note 1: Compliance with Requirement 2 within 10 flight hours
after the effective date of this Directive makes compliance with
Requirement 1 redundant.
Note 2: EASA Emergency AD 2006-0344-E refers.
Compliance:
For Requirement 1 - Within 10 hours time in service (TIS) after
the effective date this Directive
For Requirement 2 - Within 550 hours TIS or within 2 years after
the effective date of this Directive, whichever occurs first. This
Airworthiness Directive becomes effective on 16 November 2006.
Background:
Eurocopter has advised the European Aviation Safety Agency (EASA)
of a report of an in flight incident which led to the inflation of
the emergency floatation gear and the activation of various
warnings. Investigations have revealed that a screw that secures
the RH lower centre fairing interfered with an electrical harness
and caused several short circuits, resulting in the inflation of
the emergency floatation gear.
The purpose of this Directive is to detect and prevent any
interference between the electrical harnesses and the bottom
structure fairing attachment screws post MOD 073774. Embodiment of
a modification in accordance with Eurocopter drawing 350A085342 is
considered to be a temporary (interim) solution, to ensure that
there is no interference. Embodiment of a modification in
accordance with Eurocopter drawing 350A085340 is the permanent
solution that can be applied according to the availability of the
helicopter and components.
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