Voglio sapere a riguardo di…

27536

Federal Register / Vol. 86, No. 97 / Friday, May 21, 2021 / Proposed Rules
dated November 4, 2014 EASA AD
20140241E.
This proposed AD was prompted by a report of a LH side stairway door that inadvertently opened and tore off from its attachment fittings during flight.
Subsequent investigation revealed that the affected side stairway door had been recently painted and the paint impaired the external door handle motion, affecting the correct operation of the door locking safety mechanism. The FAA is proposing this AD to address incorrect locking of the LH side stairway door, which could result in an in-flight opening of the door and subsequent damage to the helicopter or injury to persons on the ground. See EASA AD
20200087 for additional background information.
Related Service Information Under 1
CFR Part 51
EASA AD 20200087 requires repetitively inspecting the locking safety mechanism of the LH side stairway door handle for correct operation and depending on the results, reconditioning the locking safety mechanism or contacting the Airbus Helicopters Support and Services Department. EASA AD 20200087 also requires modifying the locking safety mechanism, which constitutes terminating action for the repetitive inspections.
This material is reasonably available because the interested parties have access to it through their normal course of business or by the means identified in the ADDRESSES section.
FAAs Determination and Requirements of This Proposed AD
These products have been approved by the aviation authority of another country, and are approved for operation in the United States. Pursuant to the bilateral agreement with the State of Design Authority, the FAA has been notified of the unsafe condition described in the EASA AD referenced above. The FAA is proposing this AD
after evaluating all the relevant information and determining the unsafe condition described previously is likely to exist or develop in other products of these same type designs.

jbell on DSKJLSW7X2PROD with PROPOSALS

Proposed AD Requirements This proposed AD would require accomplishing the actions specified in EASA AD 20200087, described previously, as incorporated by reference, except for any differences identified as exceptions in the regulatory text of this proposed AD and except as discussed under Differences
VerDate Sep<11>2014

16:41 May 20, 2021

Jkt 253001

Between this Proposed AD and the EASA AD.
Explanation of Required Compliance Information In the FAAs ongoing efforts to improve the efficiency of the AD
process, the FAA initially worked with Airbus and EASA to develop a process to use certain EASA ADs as the primary source of information for compliance with requirements for corresponding FAA ADs. The FAA has since coordinated with other manufacturers and civil aviation authorities CAAs to use this process. As a result, EASA AD
20200087 will be incorporated by reference in the FAA final rule. This proposed AD would, therefore, require compliance with EASA AD 20200087
in its entirety, through that incorporation, except for any differences identified as exceptions in the regulatory text of this proposed AD.
Using common terms that are the same as the heading of a particular section in the EASA AD does not mean that operators need comply only with that section. For example, where the AD
requirement refers to all required actions and compliance times, compliance with this AD requirement is not limited to the section titled Required Actions and Compliance Times in the EASA AD. Service information specified in EASA AD
20200087 that is required for compliance with EASA AD 20200087
will be available on the internet at https www.regulations.gov by searching for and locating Docket No.
FAA20210374 after the FAA final rule is published.
Differences Between This Proposed AD
and the EASA AD
Where EASA AD 20200087 refers to the effective date of EASA AD 2014
0214E or its effective date, this proposed AD would require using the effective date of this AD. Where EASA
AD 20200087 refers to Group 1 and 2
helicopters, this proposed AD would not refer to any groups of helicopters.
Where the service information referenced in EASA AD 20200087
allows the pilot to perform the requirements of the ASB, this proposed AD would require the requirements to be performed by a qualified mechanic.
Where the service information referenced in EASA AD 20200087
specifies to submit certain information to the manufacturer, this AD does not include that requirement. Where the service information referenced in EASA
AD 20200087 specifies to discard certain parts, this proposed AD would require removing those parts from
PO 00000

Frm 00002

Fmt 4702

Sfmt 4702

service instead. EASA AD 20200087
requires repeating the inspection before next flight after each application of painting on the LH side stairway door or its external door handle, whereas this proposed AD would not. EASA AD
20200087 requires contacting the Airbus Helicopters Support and Services Department if it is impossible to recondition the locking safety mechanism by moving the door handle, whereas this proposed AD would require, before further flight, accomplishing paragraph 5 of EASA
AD 20200087 or accomplishing corrective action using a method approved by the Manager, International Validation Branch, FAA. The Managers approval letter must specifically refer to this AD.
Costs of Compliance The FAA estimates that this AD
affects 37 helicopters of U.S. Registry.
Labor rates are estimated at $85 per work-hour. Based on these numbers, the FAA estimates that operators may incur the following costs in order to comply with this proposed AD.
Inspecting the operation of the locking safety mechanism on the LH
side stairway door handle would take about 0.1 work-hour for an estimated cost of $9 per helicopter and $333 for the U.S. fleet.
Moving the external door handle from the Locked to the Unlocked position to determine if the safety mechanism on the LH side stairway door handle can lock automatically would take about 0.5 work-hour for an estimated cost of $43 per helicopter.
Modifying the locking safety mechanism on the LH side stairway door handle would take about 8 workhours and parts would cost about $5,000
for an estimated cost of $5,680 per helicopter.
Authority for This Rulemaking Title 49 of the United States Code specifies the FAAs authority to issue rules on aviation safety. Subtitle I, section 106, describes the authority of the FAA Administrator. Subtitle VII:
Aviation Programs, describes in more detail the scope of the Agencys authority.
The FAA is issuing this rulemaking under the authority described in Subtitle VII, Part A, Subpart III, Section 44701: General requirements. Under that section, Congress charges the FAA
with promoting safe flight of civil aircraft in air commerce by prescribing regulations for practices, methods, and procedures the Administrator finds necessary for safety in air commerce.
This regulation is within the scope of
E:FRFM21MYP1.SGM

21MYP1