Investigation PE86054: Vehicles

Status

CLOSED

Opened

May 9, 1986

Closed

Jul 31, 1986

Model years

—

Subject

Lining separation

Component: Service brakes, hydraulic

Summary

Summary of information from manufacturer:manufacturer claims that aquality control error took place.either an improperly sized rivet wasinstalled to secure the lining, or the wrong mandrel was used to crushthe rivet.the manufacturer acts as his own distributor and will be ableto account for all of the defective shoes.it appears that all of thedefective shoes were installed on school buses.analysis:brake shoes with incorrect rivets may allow the lining toseparate which could jam against the drum.this may result in the wheelassembly locking, which could lead to a loss of control of the vehicle.proposed action:send a recall request letter.

An NHTSA investigation looks into whether a safety defect exists. Opening one is not a finding. Outcomes can include a recall, closure without action, or further inquiry.