AD 2020-11-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Gulfstream | Aerospace Corporation | Airworthiness Directives; Gulfstream Aerospace Corporation Airplanes |
Unsafe Condition
The primary flight control actuation system (PFCAS) linear variable displacement transducer (LVDT) mechanical disconnect monitor may not trigger the disconnect of the affected control surfaces as required in the event of a control surface failure. This condition, if not addressed, could lead to spoiler hard-over or loss of structural integrity due to excessive surface deflection and result in loss of control of the airplane.
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Required Actions
Update the software for each PFCAS remote electronics unit (REU) from Label 34 to Label 35 by following the Accomplishment Instructions in Gulfstream G650 Customer Bulletin Number 201, dated September 28, 2017, or Gulfstream G650ER Customer Bulletin Number 201, dated September 28, 2017; the Modification Instructions, sections A through C, in Gulfstream G650 Aircraft Service Change No. 069, dated September 28, 2017, or Gulfstream G650ER Aircraft Service Change No. 069, dated September 28, 2017.
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Compliance Time
Within the next 24 months after July 27, 2020
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Affected Aircraft
Gulfstream Aerospace Corporation Model GVI airplanes, certificated in any category, serial numbers 6001 through 6111, 6113 through 6133, and 6135 through 6274.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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