The 88731-702 is a Piper OEM right-hand (RH) wing main spar reinforcement kit used as part of a structural inspection and reinforcement program defined under Piper Service Bulletin 1372. It is the RH counterpart to the LH kit 88731-701 and is installed on the right wing main spar assembly to restore or improve structural integrity in response to fatigue inspection findings or mandated compliance actions.

This kit is not a single replacement part but a structural reinforcement assembly package, typically including reinforcement plates and required installation hardware such as bolts, nuts, washers, and related consumables. Exact contents depend on aircraft model applicability and the configuration defined in the Piper Illustrated Parts Catalog and service bulletin instructions.

The wing spar is a primary load-bearing structure, responsible for transferring aerodynamic forces from the wings into the fuselage. Because of this, any reinforcement or modification is considered a major structural intervention, requiring strict compliance with Piper-approved maintenance procedures and regulatory oversight. Installation is performed during scheduled inspections, heavy maintenance events, or mandatory service bulletin embodiment.

According to Piper Service Bulletin 1372A, the 88731-701 and 88731-702 kits are specifically listed as optional reinforcement actions depending on inspection results and aircraft applicability.

Key features include:

Piper 88731-702 RH wing spar reinforcement kit
Used for structural reinforcement of right wing main spar
Installed under Service Bulletin 1372 compliance program
Includes reinforcement plates and associated structural hardware
Addresses fatigue findings and long-term wing structural integrity
Critical primary structure modification (wing load path area)
Must be installed per Piper-approved maintenance instructions
Works in conjunction with LH kit 88731-701 for full-wing coverage
Subject to strict inspection, compliance tracking, and airworthiness requirements
Used in specific Piper PA-series aircraft as defined by applicability data