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Service bulletin SIL 794

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 id10187972
Published by NHTSA2021-03-03
Manufacturer's numberSIL 794
Manufacturer's date2021-02-26
NHTSA componentSUSPENSION

NHTSA's summary

Altec discovered that one of the fasteners used to attach the rear shear plate on the subbase of the unit to the chassis can contact the chassis suspension U-bolt. The fastener can be a HuckBolt or a hex bolt and nut. Movement of the U-bolt can possibly cause damage to the HuckBolt or hex bolt and nut resulting in the fastener being broken off. Altec requires the customer to perform an inspection of the rear shear plates on both sides of the subbase to determine if HuckBolts or hex bolts and nuts were installed and if there is interference with the U-bolts. The inspection procedure included in the SIL should be completed no later than 90 days after the receipt of the SIL.

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

Suspension

Vehicles listed
ALTEC AERIAL DEVICE2016 to 2018

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