Airworthiness directives › 2018-23-05
AD 2018-23-05 Airworthiness Directives; Airbus SAS Airplanes
Models named: A350-941, A350-1041. Read the applicability below — it usually turns on serial or part numbers too.
Applicability*9
This AD applies to the Airbus SAS airplanes, certificated in any category, identified in paragraphs (c)(1) and (c)(2) of this AD. (1) Model A350-941 airplanes, manufacturer serial numbers (MSNs) 203, 205, 208, 209, 210, 212, 213, 218, 219, 221, 227, 228, and 235. (2) Model A350-1041 airplanes, MSN 188.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
Within 30 days after the effective date of this AD, revise the operator's MEL to prohibit dispatch of the airplane with any inoperative MEL item listed in figure 1 to paragraphs (g) and (i) of this AD. 4910-13-P Figure 1 to paragraphs (g) and (i) of this AD— Affected MEL items Sequence No. Item 21-09-01 AIR OVHT ON FUEL INERTING 1(2) Message. 21-09-03 AIR PRESS LO ON FUEL INERTING 1(2) Message. 21-50-01 Air conditioning Pack. 21-50-02C Pack 1 Valve—Both valves inoperative. 21-50-03C Pack 2 Valve—Both valves inoperative. 21-50-04B Pack Flow Sensor—Both sensors inoperative on the same pack. 21-50-07C Pack Ram Air Inlet Door—Associated pack considered inoperative. 21-50-08A Pack Ram Air Outlet Door—Failed open. 21-50-08C Pack Ram Air Outlet Door—Associated pack considered inoperative. 21-50-09B Pack Control Channel—Both channels inoperative. 21-58-01 Fuel Inerting Inlet Valve. 21-58-02 Fuel Inerting Inlet Valve Flap. 21-58-03 Fuel Inerting Ram Air Outlet Flap. 21-58-04 Fuel Inerting Temperature Control Valve. 21-58-05 Fuel Inerting Turbine Valve. 21-60-02C Hot Air Valve—Associated pack valves deactivated. 36-11-01 Engine Bleed Air System. 36-11-02 Engine Bleed Valve. 36-11-03 Engine Bleed Fan Air Valve. 36-11-04 Engine Bleed Overpressure Valve. 36-11-05A Engine Bleed IP Check Valve—Associated Bleed Considered Inoperative. 36-11-09 Engine Bleed Control. 36-11-10 Engine Bleed Monitoring. 36-11-11 Engine Bleed Monitoring and Control. 36-11-12 Engine Bleed Temperature Redundancy. 42-11-06 CPIOM H43. 42-11-07 CPIOM H44. 42-41-16 CRDC B01. 42-41-17 CRDC B02. 42-41-18 CRDC B03. 42-41-20 CRDC B05. 42-41-21 CRDC B06. 47-10-01 FTIS. BILLING CODE 4910-13-C
Unsafe condition
This AD was prompted by a report of a close gap between the wing lower cover (WLC) and wing rib feet. We are issuing this AD to address potential contact between the WLC and wing rib feet, which, combined with an empty fuel tank or fuel level below the wing rib foot area, could create an ignition source for the fuel vapor inside the tanks. In case of a lightning strike of high intensity in the immediate area, this condition could possibly result in ignition of the fuel-air mixture in the affected fuel tank and consequent loss of the airplane.
Affected ADs
None.
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The directive text above is reproduced from the Federal Register, a work of the United States government and in the public domain. The separation into applicability, compliance and required actions is TrackAD's.*1