CONNECTION BETWEEN THE DAMAGE AND THE 1994 REPAIRS
34 Jetopay contends that, even if the opinion evidence to which objection was taken is excluded, the remaining evidence was sufficient to support a conclusion that "the cause of the failure of the engine in July 1997" was:
· the presence of debris from within the engine from the time of the 1994 engine failure and its repair; and
· the negligence of those who carried out the repairs which took place in 1994 in not taking proper steps to clean out that debris from within the engine.
35 The conclusion of the primary judge (paragraph 55) was that, on the basis of the opinion evidence contained in the reports, the proximate cause of the July 1997 engine failure was, more likely than not, repairer's negligence, specifically, the negligence of those who carried out the repairs that took place in 1994, in not taking proper steps to clean up debris. His Honour considered that no intermediate or other plausible cause was indicated on the evidence, "as a matter of common sense and practicality". His Honour found, therefore, that the effective and proximate cause "of the 1997 failure" was repairer's negligence.
36 In the course of dealing with each of the reports that contained opinions that were the subject of objection, his Honour stated those opinions. Thus, it is clear that his Honour relied on the opinion evidence in reaching the conclusion stated above. In so far as the conclusion is based on evidence that we consider should have been rejected, we must agree that the conclusion cannot be supported.
37 Because his Honour relied on the inadmissible opinion evidence, it was not necessary for his Honour to consider whether there was other evidence that would support his Honour's conclusion that repairer's negligence was "the effective and proximate cause of the 1997 failure". If the Full Court were satisfied that other evidence is capable of supporting the conclusion, it would be appropriate for the Full Court to deal with that question. No issue of credibility arises since there was no cross-examination of any of the authors of the reports.
38 Those parts of the reports that were admitted without objection and that do not constitute opinion evidence established two kinds of damage. The first kind of damage was a crack in the cylinder block. It was described by Mr Crosby as follows:
"The engine block was seriously fractured in way of No. 6 unit where there is a 100 mm long crack at the stbd. side in 20 mm thick material: this crack then propagated to the centre of the block by 150 mm."
Mr Hughes described that damage as follows:
"A large crack was found in the cylinder block, this crack was located at the rear right hand side immediately below the rear cam shaft support bearing block. This crack which was about 150 mm long is in a critical area of the block and would require a major repair carried out before this engine could have been put back in service.
Should this crack have been left unrepaired it would most likely continue to progress until catascropic [sic] engine failure occurred."
There was no suggestion that the crack was caused by the negligence of the repairers in 1994. Rather, the inference to be drawn is that the crack was connected with the breakdown that occurred in 1994. Whether the failure to detect and repair the crack might amount to negligence on the part of the repairers is another question entirely, and one that was not addressed by the parties.
39 As indicated above, Messrs Crosby and Hughes described damage to a number of parts of the Vessel's engine, apart from the engine block. They described damage to the following parts of the engine:
· crankshaft;
· main bearings;
· connecting rod bearings;
· pistons;
· cylinder liners;
· cam shaft;
· cam shaft followers;
· fuel pump roller followers;
· valve roller followers;
· valve stems and valve faces;
· lubrication oil pump;
· oil filters.
The damage to some of those parts is described as "not serious". Other parts are described as "heavily galled and damaged". Most of the damage, however, is described as damage caused by "particulate debris".
40 In his report, Mr Crosby said that "…it cannot be stressed too highly" that, after completion of damage repairs, a "thorough flushing of the crank case and lubricating oil system" be carried out. He also said that thorough flushing was necessary again, after engine trials on the completion of repairs.
41 Mr Hughes expressed the opinion, in relation to the crankshaft, that either debris from a previous failure had lodged in some part of the engine and went undetected during a clean-up or debris generated within the engine from a failing part had circulated in the lubrication system and had been carried in the oil to the crankshaft bearings and caused "this very destructive damage". Damage resulting from the latter cause would not necessarily be within the Policy; that might depend on the cause of the failure of the part in question.
42 In any event, although it may be possible to conclude from that evidence that the damage described in detail by Messrs Crosby and Hughes was the result of inadequate flushing following repairs that were carried out in July 1994, the critical question is whether any inadequate flushing constituted negligence on the part of the repairers at that time. There is no evidence as to the nature of the repair work that was carried out in New Zealand beyond the cursory references described above. In the absence of the inadmissible opinion evidence, the remaining evidence does not establish, on the balance of probabilities, that the damage in question was caused by repairer's negligence.