Cincinnati Insurance Co. v. AMSCO Windows, 593 F. App'x 802

AMSCO manufactured windows sold to dealers; it did not install them. Homeowners in Nevada sued contractors claiming window defects caused property damage; contractors pursued claims against J&L and AMSCO.
AMSCO tendered defense to its insurer, Cincinnati, under Commercial General Liability and umbrella policies (2002–2007); Cincinnati refused, prompting declaratory judgment litigation in Utah federal court.
Utah law governs the Policies. The Policies cover "property damage" caused by an "occurrence" (defined as an "accident, including continuous or repeated exposure to substantially the same general harmful conditions") and obligate defense for any "suit."
District court held Cincinnati must defend AMSCO in active Nevada litigation because damage beyond the defective work can be an "occurrence," but need not defend in Nevada Chapter 40 prelitigation proceedings because those are not "suits." Both parties appealed; Tenth Circuit affirmed.
Chapter 40 is a Nevada statutory prelitigation scheme requiring notice, inspection, and an opportunity to repair; noncompliance produces limited consequences in later litigation but does not itself create a civil adjudication or compulsory arbitration.

Issue	Cincinnati's Argument (Plaintiff)	AMSCO's Argument (Defendant)	Held
Whether homeowner claims alleging damage beyond defective windows constitute an "occurrence" under the Policies	No — damage from defective manufacture/installation is the natural, foreseeable result of faulty workmanship and thus not an "accident/occurrence."	Yes — damage to other property can be unintended/ unexpected and thus an "occurrence" triggering a duty to defend.	The court held claims alleging damage beyond the insured's work can allege an "occurrence"; duty to defend in active litigation affirmed.
Whether Nevada Chapter 40 prelitigation proceedings qualify as a "suit" under the Policies (triggering a duty to defend)	Chapter 40 should be treated as a civil proceeding; Nev. Rev. Stat. §40.649 requires insurers to treat Chapter 40 claims as if a civil action were brought.	Chapter 40 is informal prelitigation ADR/notice process, not a civil proceeding or compulsory arbitration; Policies only cover "suits" and ADR only when insurer consents.	The court held Chapter 40 proceedings are not "suits" under Utah-governed Policies; Cincinnati has no duty to defend in Chapter 40 absent consent.

Fire Ins. Exch. v. Estate of Therkelsen, 27 P.3d 555 (Utah 2001) (insurer's duty to defend broader than duty to indemnify; coverage determined by complaint).
N.M. ex rel. Caleb v. Daniel E., 175 P.3d 566 (Utah 2008) ("occurrence" assessed by whether result was intended or expected, not mere foreseeability).
Nova Cas. Co. v. Able Constr., Inc., 983 P.2d 575 (Utah 1999) (distinguishes negligent misrepresentation context; negligent acts may still produce an "accident" depending on expectation).
Hoffman v. Life Ins. Co. of N. Am., 669 P.2d 410 (Utah 1983) (recognizes accidents can result from negligent conduct where result is unexpected).
Emp'rs Mut. Cas. Co. v. Bartile Roofs, Inc., 618 F.3d 1153 (10th Cir. 2010) (construction-defect context: natural results of negligent, unworkmanlike construction may not constitute an "occurrence"; distinguished where damage is to non-defective property).