Airworthiness directives › 2021-21-01
AD 2021-21-01 Airworthiness Directives; Airbus Helicopters Deutschland GmbH Helicopters
Applicability*9
This AD applies to Airbus Helicopters Deutschland GmbH Model EC135P1, EC135P2, EC135P2+, EC135P3, EC135T1, EC135T2, EC135T2+, and EC135T3 helicopters, all serial numbers up to 1276 inclusive, certificated in any category, with an affected hoist as identified in European Union Aviation Safety Agency (EASA) AD 2021-0011, dated January 12, 2021 (EASA AD 2021-0011).
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
This paragraph restates the requirements of paragraph (e) of AD 2019-05-06, with no changes. For Model EC135P1, EC135P2, EC135P2+, EC135P3, EC135T1, EC135T2, EC135T2+, and EC135T3 helicopters: Within 90 hours time-in-service (TIS) after April 17, 2019 (the effective date of AD 2019-05-06) and thereafter at intervals not to exceed 180 hours TIS: (1) Inspect the hook assembly and determine whether the elastomeric energy absorber has taken a permanent compression set by following the Accomplishment Instructions, paragraphs 2.A and 2.B, of Goodrich Service Bulletin No. 44301-10-17, Revision 4, dated July 26, 2017 (SB 44301-10-17). If the elastomeric energy absorber has taken a permanent compression set, replace the elastomeric energy absorber before the next hoist operation. (2) Replace the retaining ring by following the Accomplishment Instructions, paragraphs 2.D through 2.K, of SB 44301-10-17.
Unsafe condition
This AD was prompted by a report that a hook detached from the hoist cable. The FAA is issuing this AD to address detachment of a hook from a hoist cable resulting in inflight failure of the hoist, which could result in injury to persons being lifted.
Affected ADs
This AD replaces AD 2019-05-06, Amendment 39-19588 (84 FR 8961, March 13, 2019) (AD 2019-05-06).
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