( March 21, 2024, 1:49 PM EDT) -- PHILADELPHIA — An engineering firm that was sued for its allegedly defective design of a heating, ventilation and air conditioning (HVAC) system in a large apartment building failed to sufficiently state third-party claims for contribution and indemnification against the general contractor that oversaw the building’s construction because the firm failed to support all elements of the claims with factual allegations, a Pennsylvania federal judge found in granting the contractor’s motion to dismiss without prejudice....