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Service bulletin BS1728E

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 id10110053
Published by NHTSA2017-08-03
Manufacturer's numberBS1728E
Manufacturer's date2013-02-12
NHTSA componentEQUIPMENT ADAPTIVE/MOBILITY; EQUIPMENT

NHTSA's summary

The isolation valve is absent on the refrigerant return line from the roof unit.

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

Equipment and accessories

Vehicles listed
NOVA BUS LFS2011 to 2012
NOVA BUS LFS ARTIC2010 to 2012

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