Bulletin 54-088 [updated] < TESTED • 2026 >

, which is critical for maintaining balanced fuel levels and ensuring engine operation during extended flights. Regulations.gov Redundancy : The bulletin mandates the addition of a second fuel crossfeed valve

If you provide the issuing organization or the bulletin text, I’ll produce a tailored, finalized write-up formatted and populated with exact details. bulletin 54-088

Ignoring these factors, the bulletin warns, results in a 200% over-stress of the bolt, leading to either immediate yield or fatigue fracture within 1,000 cycles. , which is critical for maintaining balanced fuel

Service Bulletin 54-088 addresses wiring harness chafing in Freightliner and Western Star vehicles, which can cause active datalink fault codes (427, 1894, etc.), dashboard irregularities, and transmission performance issues. The bulletin requires inspecting the OEM harness near transmission lifting pads and sharp edges, repairing any damaged wires, and adding protective measures to prevent future chafing. Read the full story at NHTSA . Freightliner Service Bulletin - Managed Mobile Service Bulletin 54-088 addresses wiring harness chafing in