S19ZY
March 14, 2019

To:

Blue Bird Owner

Subject:

S19ZY, Regeneration Inhibit Vehicle Speed Threshold

Models Affected:

Model Year:
Model Year:
Model:

Bulletin Duration:

One (1) Year from Date of Issue

Certain 2017-2020 (School Bus)
Certain 2017-2020 (Non-School Bus)
All American School Bus and Non-School Bus

Overview:
The Blue Bird or Cummins Dealer is to use the Cummins INSITE™ electronic service diagnostic program
to set the “Regeneration Inhibit Vehicle Speed Threshold” parameter value to 0 mph.
Affected Units:
All 2017-2020 model year Blue Bird All American School Buses with Cummins ISL-13 or L9 engines
manufactured from January 20, 2016 through September 18, 2018 and all model year 2017 through
2020 Blue Bird All American Non-School Buses with Cummins ISL-13 or L9 engines manufactured from
January 29, 2016 through September 7, 2018. On the subject buses, Blue Bird or Cummins Dealer is to
use the Cummins INSITE™ electronic service diagnostic program to set the “Regeneration Inhibit Vehicle
Speed Threshold” parameter value to 0 mph.
Repair Parts:
None
Time Allowance:
Time allowed to use the Cummins INSITE™ set the “Regeneration Inhibit Vehicle Speed Threshold”
parameter value to 0 mph in each bus is 0.5 hours.
Completion Notification:
If you have an authorized Cummins Dealer perform this service 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
[email protected]

BLUE BIRD BODY COMPANY
3920 Arkwright Road, Suite 200, Macon, GA 31210 – (478) 825-2021

Blue Bird Body Company
Page 2

S19ZY

Bulletin Duration:
This Service Bulletin ends one (1) year from date of issue.
Repair Facility:
You must contact your Blue Bird Dealer or an authorized Cummins Dealer to arrange to have this
Service Bulletin performed. A qualified technician must perform work required under this bulletin.
Questions:
Questions regarding this bulletin should be directed to your local Blue Bird Dealer or Blue Bird Field
Service Engineer.
Regards,

Lisa Hancock
Engineering Services
Blue Bird Corporation
3920 Arkwright Road, Suite 200, Macon, Georgia 31210
Phone 478.822.2242
[email protected]