Caz
1. There was no Controller of Aircraft Release for the use of PRC 112 in British Military Aircraft.
2. There was, therefore, no clearance for PRC 112 to be used in the Chinook Mk2 of the Royal Air Force.
While I agree with the gist of your post, that Walter’s LZ theory is unlikely to be a factor, it cannot be discounted when posts like this highlight the appalling failings in the aircraft release process.
- The PRC112 would not need Controller Air Release as it is a hand held radio used by ground forces. The airborne component is, commonly, AN/ARS-6(V). Collectively the system is known as AN/AYD-1 PLS. Fitted at Station 130 or thereabouts, I understand.
- If an equipment does not have CA Release, it most certainly does NOT follow that it (a) does not have clearance for use in the aircraft or (b) was not in the aircraft.
For example, according to the CA Release at the time of the accident there was no Intercom cleared for use in the Mk2. Yet one was clearly fitted as radio transmissions were made!