Safety Criticality
May I tap memories please.
We know that, by MoD's policy directive of the time, the FADEC software was Safety Critical; because no manual reversion was possible. The policy was issued by DUS(DP) on 14.12.89 and reiterated on 2.6.92. It was a joint policy, agreed by Industry.
Both Boeing and Boscombe agreed, but MoD denied it. (A common theme, in denial about their own mandated policies).
Question - Did MoD ever admit it was Safety Critical?