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Service bulletin SC-21-010

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id11013314
Published by NHTSA2025-01-31
Manufacturer's numberSC-21-010
Manufacturer's date2022-05-12
Campaign id or software versionSC-21-010
NHTSA componentSTRUCTURE:BODY

NHTSA's summary

Transit bus body composite repair at the rear door if any fiberglass is delaminating.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Body and frame

Vehicles listed
PROTERRA CATALYST2017 to 2019
PROTERRA ZX52020

Listing a model year does not mean every vehicle of it is concerned: the document says which.