AD Amdt-39-11173
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Pratt & Whitney | R-1340 Series Reciprocating | Airworthiness Directives; Pratt & Whitney R-1340 Series Reciprocating Engines |
Unsafe Condition
Cylinder head cracking in Pratt & Whitney R-1340 series reciprocating engines, which can lead to engine power loss, forced landing, and damage to the aircraft.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Initial and repetitive visual inspections of cylinders for head cracking must be conducted. Fluorescent penetrant inspections are also required to detect cracks.
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Compliance Time
Before further flight
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Affected Aircraft
Pratt & Whitney R-1340 series reciprocating engines.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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