EdSet,
I am fully aware that the XV227 incident was as a result of duct failure. My point is that the first recommendation of the XV227 incident reports was:
RECOMMENDATIONS
39. It is recommended that:
a. A maintenance policy is investigated for the ruptured duct and all similar ducts.
Had a comprehensive maintenance policy been adopted following the 2004 incident involving ducting failure, it is likely that the insulation condition would have been included in the review.
This is NOT a challenge to the BoI findings, merely an echo:
XV230 BoI:
65 Recommendations
a. Policy.
(1) The Nimrod Maintenance Policy is reviewed to ensure that maintenance procedures reflect the increasing age of the aircraft.
I appreciate that hindsight is always 20/20, but risk assessments must be thorough.