I saw a documentry on this and I believe it was the Gloster (I am talking thru my hat) fishermen and yes it was a over fishing problem but they went overboard and darn near bankrupted most of the fishermen with a ban. I am sure there is someone that knows a heck of a lot more about it than I.
The Government shut down many old airtankers because of the C-130 wing failure. One such company is ARDCO here in Tucson. They have been flying Douglas DC-4's for many many years with great success. The DC-4 has never had a wing failure and yet it was banned from service. The really crappy part of this is they waited till the start of the season after ARDCO spent all winter preparing the aircraft for the upcoming season. The kind of inspections they do are very costly. In fact they de-mated the outboard wing panels on all the aircraft and X-rayed the bathtub attach fittings. This company is family owned and they use funds such as home equity and Biz loans to do this work.The forest service signed off the aircraft as airworthy and a week or so later told them they were grounded. With not so much as a howdy do or reach around.
Makes perfect sense a turbine powered aircraft that is subject to high freqency vibrations and subject to many more cracking problems than a recipricating engine powered aircraft is allowed to continue flight and the proven recip aircraft is grounded. I talk from experience for i have worked structural repair on C-130, L-382, L-188, DC-3, DC-4, DC-6, DC-7. I have seen cracks six feet long in the upper wing planks of a L-188 Electra All we did was fix cracks in the Lockheed wings. Based on my experience I would rather fly the older Douglas recip aircraft than the newer turbine aircraft. The decision was purely political and ruined many good people. Keep in mind it was the C-130 wing that failed.
And you won't see any ugly external doublers and tripler beef ups around the outboard nacelles of a Douglas 4, 6, or 7 only the Lockheed wings. This was due to the outboard engines leaving the aircraft (killing all aboard). Douglas got the wing right the first time.
Now in the commercial aviation world governed by the FAA aircraft are flown past their established life limits all the time using a continued airworthiness inspection program. But in the case of the DC-4 a life limit has never been established. Based on fatigue cracks in the wings "well there just isn't any". All this nonsense was initiated at the same exact time as one of the big boy's debute of the B-747 airtanker. Humm And by the way they sold that to the public as a new airplane when the truth be known it is a worn out corroded piece of crap Pan AM discarded years ago. I know I have worked on it.
Oh and the B-747 is limited to only 2 g's at gross weight. Just the airplane to fly in mountain turbulance at low level. But hey it's your money!
This is a quote from a Interagencies report on the grounding of the DC-4's in Tucson. Note their private think tank Dynaco could not determine if the aircraft were safe. So rather than go by the aircrafts safety record they choose to shot gun it and give the money to the big boys "sound familar?
Quote:
The report to the Chief and the Director from Dyncorp Technologies indicated that the contractors did not have enough data to provide to Dyncorp to determine the OSL. Fort Worth Texas-based DynCorp Technical Services was hired June 9th, 2004, to provide the expertise in analyzing the airworthiness documentation provided by contractors for each heavy airtanker. The DC-4 large airtankers are owned by ARDCO, Incorporated of Tucson, Arizona.
On May 10th, 2004, the Forest Service and the Department of the Interior terminated the contracts for 33 large airtankers to be used in firefighting missions due to concerns over the airworthiness of the aircraft, and firefighter and public safety. The decision was based on safety recommendations from the National Transportation Safety Board (NTSB) issued April 23, 2004, at the conclusion of their investigation into three fatal airtanker crashes related to in-flight structural failures.
End quote
When the country is going up in smoke (greenhouse gases) and all you see are whimpy little single engine turbines and $10,000.00 an hour helicopters pizzing on the fire you can thank the Forest Service.
If you want to read more:
http://www.nifc.gov/nr_airtanker-contracts.html