FUEL CAP (P/N 431-139) - As Removed

The 431-139 is a fuel cap assembly for Piper PA-31 aircraft gravity-fill fuel tank openings. This Shaw Aero Devices cap seals and secures the filler port, preventing fuel contamination and leakage during ground operations and flight. The cap features a positive-locking mechanism that maintains a tight seal under normal operating conditions.

Installation requires verification against the aircraft's Illustrated Parts Catalog and compliance with Piper maintenance manual procedures. Replace if damaged, cracked, or unable to maintain adequate seal pressure.

What is the FUEL CAP (P/N 431-139)?

The 431-139 is a fuel cap assembly for Piper PA-31 aircraft gravity-fill fuel tank openings. This Shaw Aero Devices cap seals and secures the filler port, preventing fuel contamination and leakage during ground operations and flight.

Is the 431-139 compatible with AVGAS and Jet-A fuels?

Fuel system components are designed for specific fuel types per their engineering specifications. The FUEL CAP should be verified against your aircraft's fuel system requirements. Currently available in: As Removed. Contact us for fuel compatibility details.

Does the 431-139 require companion seals or gaskets for installation?

Many fuel system components require new gaskets, O-rings, or seals during installation. Check your aircraft maintenance manual for the FUEL CAP installation requirements. We stock related sealing components and can help identify companion parts.

Are there shipping restrictions for the 431-139?

Most fuel system hardware ships via standard methods. Certain items containing fuel residue may require hazmat shipping procedures. We handle all packaging and shipping compliance. Same-day processing available for in-stock items.