AD 88-02-01 R1
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Gulfstream Aerospace Corporation | G-IV | Airworthiness Directives; GULFSTREAM AEROSPACE Model G-IV Series Airplanes |
Unsafe Condition
Potential display and use of hazardously misleading information from the flight guidance computer (FGC) during an ILS approach.
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Required Actions
Add a prohibition against ILS approaches using flight director/autopilot to the AFM limitations section, affix placards on the instrument panel and APR switch, disable the approach mode in the autopilot/flight director within 15 days, and install Gulfstream ASC #53A as terminating action.
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Compliance Time
Prior to further flight (for actions A, B, C) and within 15 days after the effective date (for action D).
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Affected Aircraft
Gulfstream Aerospace Corporation Model G-IV series airplanes, Serial Numbers 1000 through 1059.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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