AD 89-13-03
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | GQ Parachutes Ltd. | Parachute Assemblies | Airworthiness Directives; GQ PARACHUTES LTD: Applicability: Type 350 Parachute Assemblies, 850 Parachute Assemblies, and 4.8m SAC Parachutes |
Unsafe Condition
Canopies may contain understrength material due to acid contamination affecting their tensile strength and pH value.
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Required Actions
Perform an acid test on each mesh panel per GQ SB No. 25-01. Neutralize acid contamination, conduct pH and tensile tests, and remove TSO-C23c markings if pH ≤5.5 or tensile strength <180 N/25mm. Alternatively, remove TSO-C23c markings and discontinue use as approved parachutes.
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Compliance Time
prior to next use after the effective date of this AD
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Affected Aircraft
GQ Parachutes Ltd. Type 350 Parachute Assemblies (P/N MRI GQ 1277, 1304, 1325), 850 Parachute Assemblies (P/N MRI GQ 1284, 1315, 1330), and 4.8m SAC Parachutes (P/N MRI GQ 1308, D 22918/2)
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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