AD 91-04-08
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | ATR - GIE Avions de Transport R gional | ATR42-300 | Airworthiness Directives; AEROSPATIALE Model ATR42-300 and ATR42-320 Series Airplanes |
| aircraft | ATR - GIE Avions de Transport R gional | ATR42-320 | Airworthiness Directives; AEROSPATIALE Model ATR42-300 and ATR42-320 Series Airplanes |
Unsafe Condition
Loss of cockpit voice recorder (CVR) information due to the absence of the automatic shut-off feature after Modification 1848 and lack of Modification 2311.
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Required Actions
Within 30 days after the effective date, restore the automatic shut-off feature to the CVR by rewiring relay 9RK per Aerospatiale Service Bulletin ATR42-23-0018. Alternate compliance or time adjustment may be approved by the Manager, Standardization Branch, ANM-113.
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Compliance Time
Within 30 days after the effective date of this AD
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Affected Aircraft
AEROSPATIALE Model ATR42-300 and ATR42-320 series airplanes, Serial Numbers 123 through 142, fitted with Modification 1848 and not incorporating Modification 2311.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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