40 CFR 90.113 - In-use testing program for Phase 1 engines.
(a) This section applies only to Phase 1 engines. In-use testing provisions for Phase 2 engines are found in subpart M of this part. At the time of certification the engine manufacturer may propose which engine families should be included in an in-use test program. EPA will approve a manufacturer's test program if the selected engine families represent an adequate consideration of the elements listed in paragraphs (b) and (c) of this section.
(b)Number of engines to be tested. The number of engines to be tested by a manufacturer is determined by the following method:
(1) For an engine manufacturer with total projected annual production of more than 75,000 engines destined for the United States market for that model year, the minimum number of engines to be tested may be the lowest of the numbers determined in paragraph (b)(1)(i), (ii) or (iii) of this section:
(3) Engine families certified to different emission standards;
(4) Different engine designs (such as sidevalve head versus overhead valve engines);
(d)Collection of in-use engines. An engine manufacturer may procure in-use engines which have been operated for between half and three-quarters of the engine's advertised (or projected) useful life. All testing may be completed within three years from the date the certificate is first issued for an engine family undergoing in-use testing.
(1) Test engines may be procured from sources not associated with the engine manufacturer or vehicle manufacturer, except that with prior approval of the Administrator, an engine manufacturer with annual sales of less than 50,000 engines may obtain in-use engines associated with itself or its vehicle manufacturer.
(2) A test engine should have a maintenance history representative of actual in-use conditions.
(i) A manufacturer may question the end user regarding the accumulated usage, maintenance, operating conditions, and storage of the test engines.
(ii) Documents used in the procurement process may be maintained as required in § 90.121.
(3)Maintenance and testing of test engines.
(i) The manufacturer may perform minimal set-to-spec maintenance on a test engine. Maintenance may include only that which is listed in the owner's instructions for engines with the amount of service and age of the acquired test engine.
(ii) Documentation of all maintenance and adjustments may be maintained and retained as required by § 90.121.
(4) One valid emission test may be conducted for each in-use engine.
(5) If a selected in-use engine fails to comply with any applicable certification emission standard, the manufacturer may determine the reason for noncompliance. The manufacturer may report all determinations for noncompliance in its annual in-use test result report as described below.
(e)In-use test program reporting. The manufacturer may submit to the Administrator by January 30 of each calendar year all emission testing results generated from in-use testing. The following information may be reported for each test engine:
(1) Engine family;
(3) Engine serial number;
(4) Date of manufacture;
(5) Estimated hours of use;
(6) Results of all emission testing;
(7) Summary of all maintenance and/or adjustments performed;
(8) Summary of all modifications and/or repairs; and
(9) Determinations of compliance and/or noncompliance.
(f) The Administrator may approve and/or suggest modifications to a manufacturer's in-use testing program.