AD 93-21-06
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Gulfstream Aerospace LP | 1125 Westwind Astra | Airworthiness Directives; ISRAEL AIRCRAFT INDUSTRIES, LTD. Model 1125 Westwind Astra Series Airplanes |
Unsafe Condition
Cracks in the horizontal stabilizer hinge fitting outer lug root radius, fore and aft surfaces, and around the hinge pin head and nut of the lugs could reduce structural integrity of the horizontal stabilizer assembly.
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Required Actions
Perform visual inspections of the horizontal stabilizer hinge fitting and aft spar splice fitting per Service Bulletin 1125-55-017. Replace part number 453005-503 with improved titanium part number 453005-509 within one year. Inspections must be repeated at intervals not exceeding specified time-in-service hours unless cracks are found, requiring immediate replacement before further flight.
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Compliance Time
Within the next 50 hours time-in-service after July 31, 1992 (or 25 hours time-in-service after December 13, 1993 for paragraph (b)), and within one year after December 13, 1993 for part replacement.
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Affected Aircraft
ISRAEL AIRCRAFT INDUSTRIES, LTD. Model 1125 Westwind Astra series airplanes without part number 453005-509 installed.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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