TWO company reports into the fatal Castle Peak power station explosion which contained references to faulty equipment and operating errors were not put before the original inquest into the deaths. Instead, another, less critical report was produced for the benefit of the jury and Coroner Warner Banks. The official disclosure was made on the second day of the resumed inquest into the deaths of Yip Ka-pui, 40, and Wong Kwong-yu, 38, who were killed in the blast on August 28 last year. The inquest, which originally returned a verdict of accidental death, was reopened on the instructions of the Attorney-General, Jeremy Mathews, after allegations were made about the existence of the two reports. Yesterday, Dr Richard Jack, scientific services officer for China Light and Power (CLP) - which jointly owns the power station with Exxon Energy Ltd - was recalled to give evidence. One of the reports not presented at the original inquest is known as the Blue Report and was drawn up by CLP staff and co-authored by Dr Jack. The other was drawn up by Exxon Energy. The third report, produced at the original inquest, is known as the RedReport. Dr Jack acknowledged that he did not inform the original inquest about the existence of the Blue and Exxon Reports, saying ''the occasion never arose''. He agreed with Coroner's Officer Clive Grossman QC that the Exxon Report contained references to faulty equipment and operator error at the plant which were omitted from the Red Report. However, he maintained that elements of Exxon's findings did come out during the first hearing. Mr Grossman said: ''You were aware and nobody else was that there had been a report prepared by Exxon which was very critical. I want to know whether you made it clear in all the technical and scientific evidence you gave that the cause of the explosion was due to faulty equipment and operating error.'' Dr Jack replied: ''I do believe we made it clear there was operating error.'' Mr Grossman: ''If the equipment hadn't been faulty and if CLP operators hadn't made an error, would this explosion have happened?'' Dr Jack: ''I don't believe so.'' Mr Grossman: ''Did you not feel that it might have been your duty to tell the jury that there was a report commissioned by your company and which indicated in unequivocal terms the cause of the incident - and put it down basically to faulty equipment andoperator error?'' Dr Jack: ''No, sir. I thought that all the material facts that were relevant to this explosion had become clear.'' Dr Jack went on to say he disagreed with some of the Exxon findings, although he accepted its claims that the plant had wiring deficiencies and a critical lack of instrument testing procedures in some areas. Mr Grossman: ''Was that in the Red Report?'' Dr Jack: ''That particular point is not in the Red Report.'' Mr Grossman: ''Why not?'' Dr Jack: ''I really can't answer that. We put in the Red Report what we thought were the essential facts associated with what happened. Why we didn't point out that particular fact in the Red Report I really cannot recall 14 months after we wrote it.'' In response to findings in the Exxon Report about faulty alarms, Dr Jack said: ''We did find evidence that some alarm systems had been, by mistake, overridden for several reasons. Though it had no bearing on the explosion, it was clearly undesirable.'' Mr Grossman: ''Do you accept that if the Exxon Report had been before the jury at the original inquest it would have thrown a different light on what happened?'' Dr Jack: ''I think that is a legal question which needs a legal mind to answer.'' Mr Grossman: ''The Red Report did not mention operator error. Why did it not deal with error by the staff of CLP?'' Dr Jack: ''That is the style and practice within CLP. It is the way in which CLP carries on its business and the way it writes its internal business.'' Later Mr Grossman said: ''You didn't volunteer anything in the Blue Report unless by chance the questioner [at the original inquest] happened to hit upon it.'' Dr Jack: ''I would not accept that was the position. I think we provided a lot more information than was actually in the Red Report.'' Under questioning from Michael Beloff QC for the power station owners, Dr Jack said the Blue Report was drawn up to help improve the operation of the company. He said he had not been inhibited from revealing to the jury factors not in the Red Report. Dr Jack added: ''The practices at Castle Peak were excellent by world standards. I think it extremely unlikely that a hazard operability study would have posited exactly this chain of events.'' The hearing continues on Monday.