Airworthiness directives › 2021-13-11
AD 2021-13-11 Airworthiness Directives; MHI RJ Aviation ULC (Type Certificate Previously Held by Bombardier, Inc.) Airplanes
Applicability*9
This AD applies to MHI RJ Aviation ULC (type certificate previously held by Bombardier, Inc.) Model CL-600-2D15 (Regional Jet Series 705) and CL-600-2D24 (Regional Jet Series 900) airplanes, certificated in any category, having serial numbers 15057, 15063 through 15065 inclusive, 15071, 15074, 15079, 15087, 15090, 15106, 15111, 15113, 15115, and 15117.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
Within 36 months after the effective date of this AD: Modify the floor structure between fuselage station (FS) 379.00 and FS 394.00 at right buttock line (RBL) 37.75 in accordance with paragraph 2.B. of the Accomplishment Instructions of MHI RJ Service Bulletin 670BA-53-060, Revision A, dated September 17, 2020.
Unsafe condition
This AD was prompted by a report that the lower aft outboard supporting structure of galley 2 does not meet certification requirements for all flight and/or emergency landing loads. The FAA is issuing this AD to address the insufficient structural safety margin of galley 2 in case of hard landing or severe turbulence. This condition, if not corrected, could result in injury to the occupants and could limit access to the exit door during emergencies if the galley is displaced or fails structurally.
Affected ADs
None.
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