Eurocopter has now issued Safety Information Notice 2197-S-00 concerning flight in volcanic ash. Reproduced text:
Due to the eruption of the volcano in Iceland EUROCOPTER has been contacted by many operators asking for advice on how to proceed with their operation under these circumstances.
Flying in an atmosphere containing volcanic ash may affect the behaviour of the helicopter. Depending to the variety of the particles (size, weight, density, chemical composition…) it may increase the probability of a partial
power loss, engine flame out, navigation and piloting instruments failure or other helicopter malfunctions. Flight in such conditions may also decrease visibility and accelerate erosion of certain helicopter parts. In the past, on EC helicopters, engine flame outs have been experienced after flight through industrial smoke.
As a consequence EUROCOPTER advises operators to avoid flight in area of high density volcanic ash contamination (named zone 1 or black zone).
The flights done in potential contamination zone (area of low density volcanic ash contamination named zone 2 or red zone) have to be treated as flight in sandy or contaminated atmosphere. In this case the specific maintenance for flight in sandy or contaminated atmosphere has to be applied. The use of blades erosion protection kit is an option that remains at operator initiative. Engines in this environment must be operated and inspected in accordance with the applicable engine manufacturers instructions. Operators are requested to report to EC any unusual findings or unusual helicopter behaviour in operations.
Helicopters parked outside shall be protected by adequate covers to avoid accumulation and penetration of particles. Helicopters which have been exposed to volcanic ash shall be washed in accordance with general
procedures which are applied under conditions such as salt water or sand and dust environment.
EUROCOPTER stays at your disposal for further questions. Please refer to your normal contact person at EUROCOPTER’s technical support department