Airworthiness directives › 2023-11-09
AD 2023-11-09 Airworthiness Directives; Gulfstream Aerospace Corporation Airplanes
Models named: GVII-G500. Read the applicability below — it usually turns on serial or part numbers too.
Applicability*9
This AD applies to Gulfstream Aerospace Corporation Model GVII-G500 airplanes having serial numbers (S/Ns) 72001 through 72111 inclusive; and GVII-G600 airplanes having S/Ns 73001 through 73106 inclusive; certificated in any category, with flight control computer (FCC) software revisions installed as specified in figure 1 to paragraph (c) of this AD. Figure 1 to Paragraph ( c ) of This AD—FCC Software Revision Installed Model Nomenclature Gulfstream Aerospace Corporation part No. (P/N) Thales P/N GVII-G500 airplanes FCC COM-MON Module A FCC COM-MON Module B 72P2700001Z100-SW6.3 72P2700001Z200-SW6.3 C13204JB01 C13212JB01 GVII-G600 airplanes FCC COM-MON Module A FCC COM-MON Module B 72P2700001Z100-SW8.1 72P2700001Z200-SW8.1 C13204KB01 C13212KB01 Note 1 to paragraph (c): The FCC software label, which identifies the software revision installed, can be found on the face of the FCC module. The FCC modules are installed within the left and right electronic equipment racks. The labels may be viewed by opening the rack doors and removing 4 screws per FCC (8 screws total per airplane) from the FCC cover.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
Within 90 days after the effective date of this AD, update the FCC software in accordance with either: (1) Gulfstream GVII-G500 Aircraft Service Change No. 039, Revision A, dated September 13, 2022, including Thales Service Bulletin C13204J-27-002, Revision 01, dated September 13, 2022, and Thales Service Bulletin C13212J-27-002, Revision 01, dated September 13, 2022; or Gulfstream GVII-G600 Aircraft Service Change No. 029, Revision A, dated September 13, 2022, including Thales Service Bulletin C13204K-27-002, Revision 01, dated September 13, 2022, and Thales Service Bulletin C13212K-27-002, Revision 01, dated September 13, 2022; as applicable; or (2) A method approved by the Manager, East Certification Branch, FAA.
Unsafe condition
This AD was prompted by reports of two landing incidents where the alpha limiter engaged in the landing flare in unstable air while on the approach and caused high rate of descent landings and damage to the airplane. The FAA is issuing this AD to address inappropriate alpha limiter engagement during the landing flare, which can limit pilot pitch authority during a critical phase of flight near the ground, and result in a high rate of descent landing with possible consequent loss of control of the airplane.
Affected ADs
This AD affects AD 2020-02-18, Amendment 39-21026 (85 FR 8153, February 13, 2020) (AD 2020-02-18); and AD 2022-10-05, Amendment 39-22043 (87 FR 27494, May 9, 2022) (AD 2022-10-05).
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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