Airworthiness directives › 2014-25-52
AD 2014-25-52 Airworthiness Directives; Airbus Airplanes
Models named: A330-223F, -243F, A330-201, -202, -203, -223, -243, A330-301, -302, -303. Read the applicability below — it usually turns on serial or part numbers too.
Applicability*9
This AD applies to the Airbus airplanes, certificated in any category, identified in paragraphs (c)(1) through (c)(6) of this AD. (1) All Model A330-223F and -243F airplanes. (2) All Model A330-201, -202, -203, -223, and -243 airplanes. (3) All Model A330-301, -302, -303, -321, -322, -323, -341, -342, and -343 airplanes. (4) All Model A340-211, -212, and -213 airplanes. (5) All Model A340-311, -312, and -313 airplanes. (6) All Model A340-541 and A340-642 airplanes.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
Within 2 days after the effective date of this AD, revise the AFM to incorporate procedures to address undue activation of Alpha Prot by inserting the text specified in figure 1 to paragraph (g) of this AD into the Emergency Procedures section of the applicable AFM, to advise the flightcrew of emergency procedures for abnormal Alpha Prot. This may be accomplished by inserting a copy of this AD into the AFM. When a statement identical to the text specified in figure 1 to paragraph (g) of this AD is included in the general revisions of the AFM, the general revisions may be inserted in the AFM, and the text specified in figure 1 to paragraph (g) of this AD may be removed. Figure 1 to Paragraph ( g ) of This AD—AFM Procedure • If the Alpha Prot strip (black and amber) completely and permanently hides the VLS strip (amber) in a stabilized wings-level flight path (without an increase in the load factor): Keep on one ADR. Turn off two ADRs. In case of dispatch with one ADR inoperative, switch only one ADR to OFF. CAUTION RISK OF ERRONEOUS DISPLAY OF THE VSW STRIP (RED AND BLACK) AND RISK OF UNDUE STALL WARNING Do not increase speed. Consider using the Flight Path Vector (FPV). Recover affected DU by using associated DMC switching. When at or above safety altitude, level off. • At any time, with a speed above VLS, if the aircraft goes to a continuous nose down pitch rate that cannot be stopped with backward sidestick inputs, immediately: Keep on one ADR. Turn off two ADRs.
Unsafe condition
This AD was prompted by a report of Angle of Attack (AoA) probes jamming on an in-service Airbus Model A321 airplane. We are issuing this AD to ensure the flightcrew has procedures to counteract the pitch down order due to abnormal activation of the Alpha Prot. An abnormal Alpha Prot, if not corrected, could result in loss of control 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