However, at EPCOR -one of the world’s main suppliers of APU maintenance, repair and overhaul- a trend in post-storage failure of APU’s has been detected. Due to inadequate preservation measures during storage, APU’s suffer from full seizure and are rendered out of order. This has occurred with the Honeywell GTCP 131-9B, the APU operated on Boeing 737 aircraft, and may occur with other APU types as well.
APU failure after more than 7 days parking of aircraft
The Covid-19 pandemic caused airlines worldwide to keep their aircraft grounded for a longer period of time. Entire fleets were parked and stored. OAM’s and OEM’s provided specific measures to preserve aircraft, engines and parts during storage. These measures aim at flawless fleet recovery. Depending on the areas, when the consequences of Covid-19 seem to diminish, aircraft are taken out of storage. As air travel picks up, so do airlines’ operations. Many aircraft are taking off again and do so without any major problems.
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