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FAA
Federal Aviation Administration Department of Transportation
Aviation Safety
AIRWORTHINESS DIRECTIVE
Generated by Aircraft-logs.com — March 22, 2026

AD 71-13-01 SUPERSEDED

Fuel Injector Manifold To Nozzle Tube Assemblies
WARNING: This AD has been superseded and is no longer active. Replaced by: 71-13-01R1. Refer to the superseding AD(s) for current requirements.
Key Information
AD Number 71-13-01 Status Superseded
Effective Date June 22, 1971 Issue Date Not specified
Docket Number Unknown Amendment 39-1231
Product Type ["Engine"] Product Subtype Not specified
CFR Part --- - Part 39 CFR Section N/A
Citation This information is not available.
Applicability
Manufacturer(s) Lycoming Engines
Model(s) TIO-540-A1A TIO-540-A1B TIO-540-A1C TIO-540-A2A TIO-540-A2B TIO-540-A2C
Related Airworthiness Directives
Superseded By 71-13-01R1
Regulatory Text

71-13-01 AVCO LYCOMING: Amdt. 39-1231. Applies to TIO 540-A series engines with serial numbers lower than 1931-61.
Compliance required within the next 50 hours' time in service after the effective date of this AD, unless already accomplished.
To prevent possible failures of the fuel injector manifold to nozzle tube assemblies accomplish the following:
1. Visually inspect each tube assembly for fuel stains, cracks, dents and bend radii under 5/8 inch. Replace cracked or dented lines and increase bends to 5/8 inch or more without denting or kinking before further flight.
2. Install support clamps in accordance with the instructions contained in Lycoming Service Bulletin No. 335 or later revision approved by the Chief, Engineering and Manufacturing Branch, FAA, Eastern Region.
This amendment is effective June 22, 1971.

AD 71-13-01 — Fuel Injector Manifold To Nozzle Tube Assemblies
Printed from Aircraft-logs.com — 03/22/2026