RAMIREZ, P. J.
In this matter, we have reviewed only the petition and judicially noticed records detailed below. Although real party in interest was invited to file a response to the petition, no response was filed. We have determined that resolution of the matter involves the application of settled principles of law, and that the equities favor petitioner. We conclude that issuance of a peremptory writ in the first instance is therefore appropriate. (Palma v. U.S. Industrial Fasteners, Inc. (1984) 36 Cal.3d 171, 178.)
This is a products defect case involving an allegedly faulty diesel engine in a Ford F-250 pickup. It was intended to trail the lead case of five in the trial court. However, the lead case was raised before this court in a petition for writ of mandate decided and granted in our nonpublished opinion, Ford v. Superior Court (Coon) (Mar. 14, 2018, E069775) (hereafter Coon).
"As a general rule, a challenge of a judge is permitted under section 170.6 any time before the commencement of a trial or hearing. [Citations.] . . . Subdivision [(a)](2) of section 170.6, however, establishes three exceptions to the general rule, namely, the '10-day/5-day' rule, the `master calendar' rule, and the `all purpose assignment' rule." (People v. Superior Court (Lavi) (1993) 4 Cal.4th 1164, 1171 (Lavi).) Under the master calendar rule, a party directed to trial of a cause where there is a master calendar must make a section 170.6 challenge to the judge supervising the master calendar at the time of the assignment. (§ 170.6, subd. (a)(2).) But, "[u]nder a true master calendar, a `ready case is assigned to a ready department.' [Citation.]" (Lavi, at p. 1175.) "`When the case is assigned for a future trial, the reasons for the special "master calendar" provision in section 170.6 do not exist.'" (Id. at p. 1176, citing Villarruel v. Superior Court (1973) 35 Cal.App.3d 559, 564.) Nonetheless, "[b]y stating that the courtroom must be `ready,' we do not suggest that the courtroom actually be idle at the time of assignment. Rather, we mean that the courtroom is available or reasonably expected to become available shortly so that the trial may commence. For example, an assignment made in the morning for a trial expected to begin that afternoon could fall within the master calendar rule, as could an assignment made in the afternoon for a trial expected to begin the following morning. [Citation.]" (Lavi, at p. 1177, fn. 8.)
Here, the assignment from the master calendar court to Judge Sykes's court was for a future trial. In fact, on the date of the assignment, January 5, 2018, only Coon, supra, E069775, was assigned a trial date. The master calendar court assigned Ettleman (and the other three cases) to Judge Sykes's court in the expectation of trying them serially after Coon, but no actual dates were identified. A master calendar assignment to a trial court need not begin immediately, but the interval must be brief, e.g., assignment in the morning for trial to commence that afternoon or in the afternoon for trial to commence the next morning. (Lavi, supra, 4 Cal.4th at p. 1177, fn. 8.) Here, the master calendar court made the assignment to Judge Sykes in Department 6 during the morning session on Friday, January 5, 2018. However, trial in the case of Ettleman (and the other three trailing related cases) were not assigned a trial date. That does not meet the exception footnoted in Lavi.
Another reason exists to grant relief in this case. The simple fact that cases have been deemed "related," as the master calendar court so deemed here, is insufficient to bar section 170.6 challenges in the individual cases, even if the lead case is successfully challenged, unless the related cases are a continuation of the lead case. "`[A] proceeding is a continuation of the original action out of which it arises if it involves "substantially the same issues" as the original action.' [Citation.]" (NutraGenetics, LLC v. Superior Court (2009) 179 Cal.App.4th 243, 253.) Here, the four related cases—Watts, Ettleman, Tanner, and Nolan—do not arise out of Coon, supra, E069775.
Accordingly, we have determined that the trial court abused its discretion in denying petitioner's section 170.6 statement of disqualification, and that the petition should be granted.
Let a peremptory writ of mandate issue, directing the Superior Court of Riverside County to vacate its order of January 16, 2018, in Riverside Superior Court case No. PSC1301934, denying petitioner's section 170.6 statement of disqualification, and to enter a new and different order granting disqualification and assigning another judge to the trial of this case. Each party to bear their own costs.
Petitioner is directed to prepare and have the peremptory writ of mandate issued, copies served, and the original filed with the clerk of this court, together with proof of service on all parties.