AD 74-26-10
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Piper Aircraft Inc. | PA-31 | Airworthiness Directives; Piper Models PA-31, PA-31-300, PA-31-350, and PA-31P Airplanes |
| aircraft | Piper Aircraft Inc. | PA-31-300 | Airworthiness Directives; Piper Models PA-31, PA-31-300, PA-31-350, and PA-31P Airplanes |
| aircraft | Piper Aircraft Inc. | PA-31-350 | Airworthiness Directives; Piper Models PA-31, PA-31-300, PA-31-350, and PA-31P Airplanes |
| aircraft | Piper Aircraft Inc. | PA-31P | Airworthiness Directives; Piper Models PA-31, PA-31-300, PA-31-350, and PA-31P Airplanes |
Unsafe Condition
Inadvertently or accidentally shutting down an engine due to lack of a protective guard over the magneto switches.
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Required Actions
Install a protective guard over the magneto switches in accordance with Piper Service Letter No. 675. Equivalent installations must be approved by the Chief, Engineering and Manufacturing Branch, FAA Eastern Region. Compliance time may be adjusted upon submission of substantiating data through an FAA Maintenance Inspector.
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Compliance Time
Within the next 100 hours time in service after the effective date of this Airworthiness Directive
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Affected Aircraft
Piper Models PA-31 (S/N 31-2 to 31-7300969), PA-31-300 (same serial range), PA-31-350 (S/N 31-5001 to 31-7305091), and PA-31P (S/N 31P-1 to 31P-7300161)
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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