RAF staff reported that it was extremely unusual for all four of the RAF Valley helicopters to be unserviceable with such substantial technical faults.
The report added the performance of the crew from RAF Leconfield was was 'extremely commendable'.
It added: 'However, the risks they faced during the rescue were exacerbated by the lack of more locally available search-and-rescue helicopters.'
The MV Carrier ran aground in strong winds and large waves on the North Wales coast on April 3rd last year, having been loading limestone at Raynes Jetty at Llanddulas.
All seven Polish crew members were winched to safety and were uninjured, in spite of the delay. However, the vessel was substantially damaged and was declared a 'total constructive loss'.
More top news
It's not too bad out there tonight. A few showers over northern areas, but dry elsewhere with temperatures degrees milder than last night.
Traders across Wales have told ITV News the migrant crisis in Calais is having a 'devastating' impact on their business.
The Balmoral is back but for how long? Volunteers appeal for public support to keep her sailing the Bristol Channel.