AD 78-25-03
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Piper Aircraft Inc. | PA-23-250 | Airworthiness Directives; THE DEUTSCH COMPANY, METAL COMPONENTS DIVISION: Applies to P/N 94B0100004F0160 and 94F0100004F0166 Hose Assemblies Marked With Identification 4Q77 or 1Q78 |
| aircraft | Piper Aircraft Inc. | PA-28R-180 | Airworthiness Directives; THE DEUTSCH COMPANY, METAL COMPONENTS DIVISION: Applies to P/N 94B0100004F0160 and 94F0100004F0166 Hose Assemblies Marked With Identification 4Q77 or 1Q78 |
| aircraft | Piper Aircraft Inc. | PA-28R-200 | Airworthiness Directives; THE DEUTSCH COMPANY, METAL COMPONENTS DIVISION: Applies to P/N 94B0100004F0160 and 94F0100004F0166 Hose Assemblies Marked With Identification 4Q77 or 1Q78 |
| aircraft | Piper Aircraft Inc. | PA-28R-201 | Airworthiness Directives; THE DEUTSCH COMPANY, METAL COMPONENTS DIVISION: Applies to P/N 94B0100004F0160 and 94F0100004F0166 Hose Assemblies Marked With Identification 4Q77 or 1Q78 |
| aircraft | Piper Aircraft Inc. | PA-28R-201T | Airworthiness Directives; THE DEUTSCH COMPANY, METAL COMPONENTS DIVISION: Applies to P/N 94B0100004F0160 and 94F0100004F0166 Hose Assemblies Marked With Identification 4Q77 or 1Q78 |
| aircraft | Piper Aircraft Inc. | PA-31 | Airworthiness Directives; THE DEUTSCH COMPANY, METAL COMPONENTS DIVISION: Applies to P/N 94B0100004F0160 and 94F0100004F0166 Hose Assemblies Marked With Identification 4Q77 or 1Q78 |
| aircraft | Piper Aircraft Inc. | PA-31-300 | Airworthiness Directives; THE DEUTSCH COMPANY, METAL COMPONENTS DIVISION: Applies to P/N 94B0100004F0160 and 94F0100004F0166 Hose Assemblies Marked With Identification 4Q77 or 1Q78 |
| aircraft | Piper Aircraft Inc. | PA-31-325 | Airworthiness Directives; THE DEUTSCH COMPANY, METAL COMPONENTS DIVISION: Applies to P/N 94B0100004F0160 and 94F0100004F0166 Hose Assemblies Marked With Identification 4Q77 or 1Q78 |
| aircraft | Piper Aircraft Inc. | PA-31-350 | Airworthiness Directives; THE DEUTSCH COMPANY, METAL COMPONENTS DIVISION: Applies to P/N 94B0100004F0160 and 94F0100004F0166 Hose Assemblies Marked With Identification 4Q77 or 1Q78 |
| aircraft | Piper Aircraft Inc. | PA-31P | Airworthiness Directives; THE DEUTSCH COMPANY, METAL COMPONENTS DIVISION: Applies to P/N 94B0100004F0160 and 94F0100004F0166 Hose Assemblies Marked With Identification 4Q77 or 1Q78 |
Unsafe Condition
The hose assemblies (P/N 94B0100004F0160 and 94F0100004F0166 marked with identification 4Q77 or 1Q78) may develop contamination or failure due to manufacturing defects, creating an unsafe condition in aircraft systems.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Within ten hours time in service after the effective date, inspect for presence of the specified hose assemblies. If installed, remove and replace them prior to further flight, and check the system for contamination; purge if contamination is found.
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Compliance Time
Within the next ten hours time in service after the effective date of this AD, inspect. If installed, prior to further flight, remove and replace. Compliance time may be adjusted with FAA approval upon submission of data.
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Affected Aircraft
THE DEUTSCH COMPANY, METAL COMPONENTS DIVISION hose assemblies (P/N 94B0100004F0160 and 94F0100004F0166 marked 4Q77 or 1Q78) installed on Piper Models PA-23-250, PA-28R-180, PA-28R-200, PA-28R-201, PA-28R-201T, PA-31, PA-31-300, PA-31-325, PA-31-350, PA-31P, PA-31-TI, PA-31-T, PA-34-200T, and PA-44-180 aircraft. Specific serial ranges are listed in the AD.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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