Managers Perspective....Just like politicians and current management you are trying to not answer the question and distort the facts to divert attention away from the real issue.
FACT:The aircraft was serviced offshore.
FACT:Something was not done correctly.
FACT:The aircraft was grounded
Quote from PM.. "So far it sounds no more than a pressurisation whistle to me"
FACT: The aircraft was grounded because of a problem that happened after it was serviced.This cost the airline and it's reputation a huge amount.Not only because the aircraft was not earning money and because people in AUSTRALIA had to fix the problem but because of the public found out about YET ANOTHER OVERSEAS SCREWUP.
If the problem was "just a pressurisation whistle" as you put it MP and was of no significance then WHY WAS THE AIRCRAFT GROUNDED?