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Service bulletin S20AT

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 id10182457
Published by NHTSA2020-11-11
Manufacturer's numberS20AT
Manufacturer's date2020-11-09
NHTSA componentSERVICE BRAKES; ELECTRICAL SYSTEM

NHTSA's summary

Overview: Certain buses built with SmartTrac Hydraulic Anti-lock Brakes (ABS) may have dual fuse block 10041668 assembled incorrectly, causing the ABS fault lamp to illuminate. The Dealer is to inspect and verify the correct assembly of dual fuse block 10041668, per the enclosed instructions and correct as required. Affected Units: Certain model year 2021 Blue Bird Vision School Buses Manufactured from December 12, 2019 through March 7, 2020 The buses in your fleet that are affected by this Service Bulletin S20AT, are identified by Blue Bird Body Serial Number(s) on the enclosed cover sheet. Service Bulletin S20AT will be mailed to all owners on record. Be sure to review your list and advise of any incorrect owner names and/or addresses. Repair Parts: No additional parts/items are required to perform Service Bulletin S20AT. Time Allowance: Time allowed to inspect and install the lock washer under the nut as designed is 0.1 hours (6 minutes). Completion Notification: If you perform this service bulletin yourself or have an outside repair facility perform this bulletin, please notify your Blue Bird Dealer, when the repair is completed. Send the body number, repair date, and odometer reading to your Blue Bird Dealer. If you request reimbursement for labor, also send a copy of the work order/invoice to your Blue Bird Dealer. If the modification directed by this notification was performed on your unit prior to the receipt of this notification, you may be eligible to receive reimbursement for the cost of obtaining a pre-notification remedy of the subject matter of the campaign. Please provide a copy of all receipts to campaignparts@blue-bird.com Bulletin Duration: This Service Bulletin ends one (1) year from date of issue. Repair Facility: We encourage you to contact your Blue Bird Dealer to arrange to have this Service Bulletin performed.

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

Brakes, Electrical system

Vehicles listed
BLUE BIRD BBCV2021

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