(Note to our readers: the above video was shot several days ago during a successful demonstration flight of the Martin Mars.)
The Martin Mars struck shallow rocks in Lake Winnebago on Friday while doing a demonstration during Wisconsin’s EAA AirVenture Oshkosh airshow, according to a Canadian news report.
Pilots were scooping water out of the lake when an engine warning light came on, and they were forced to abandon take off. The plane struck shallow rocks, which punched a few repairable holes in the plane’s belly, according to the news report.
Above: Heli-Rappellers at Salmon, Idaho just after they were transported back to the base by a helicopter after supporting the Comet Fire. L to R: Chris Lilley, Jacob Edluna, and Matt Knott.
Thursday we stopped by the U.S. Forest Service Helibase at the airport at Salmon, Idaho. Some of the 19 USFS personnel assigned to the base were supporting the 367-acre Comet Fire 12 miles north of the airport.
Eric Ellis, the Base Manager who was kind enough to show us around, said they saw the lighting strike that ignited the fire on July 26. Later four firefighters from the base rappelled into the steep terrain. The helibase crew also helped to facilitate helicopter water bucket work and sling loads of equipment.
At the base on Thursday was one 205++ helicopter and one K-MAX helicopter. A second 205++ and a Sikorsky were away working on fires.
Salmon is the home of the largest of the USFS rappel bases. They have two 205++ helicopters assigned that are each staffed seven days a week. The USFS is the only federal land management agency that has wildland firefighters who rappel into fires. The National Park Service has quite a few helitack personnel trained for short haul, the technique of transporting one or more people at the end of a rope attached to a helicopter, but without sliding down the rope.
An hour or so after we photographed the K-MAX helicopter at the base, we saw the same ship dropping water on the Comet Fire.
In dramatic fashion, the helicopter was forced to hover over the tarmac while firefighters cobbled together a landing platform out of wooden palettes, The Yakima Herald reported. Some crew members and passengers jumped out of the helicopter while it hovered.
Weston Burch sent us this excellent photo of Tanker 912 dropping retardant on the Hayden Pass Fire, July 14, 2016. The fire was 17 air miles southeast of Salida, Colorado. The aircraft was working out of the Pueblo, Colorado airport at the time. Thanks Weston!
As a bonus, here is a video of a DC-10 dropping on the Sand Fire near Los Angeles. Click on the arrows at bottom/right to see it in full screen.
The Colorado Division of Fire Prevention and Control posted this video which apparently shows one of the state’s Multi-Mission Aircraft using infrared sensors to detect a single-tree fire. In the brief period of normal (not infrared imagery) there is very little visible smoke.
The investigators concluded that a wing stalled either independently or in combination with an encounter with a wing-tip vortex generated by another aircraft.
Below is the TSB’s Summary of the incident:
An Air Tractor AT-802A on amphibious floats (registration C-GXNX, serial number AT- 802A-0530), operating as Tanker 685, was carrying out wildfire management operations during daylight near Chantslar Lake, British Columbia. Three similar aircraft were working as a group with Tanker 685, which was second in line on a touch-and-go to scoop water from Chantslar Lake. Upon liftoff, control was lost and the aircraft’s right wing struck the water. The aircraft water-looped, and the floats and their support structure separated from the fuselage. The aircraft remained upright and slowly sank.
The pilot received minor injuries, egressed from the cockpit, and inflated the personal flotation device being worn. The third aircraft in the formation jettisoned its hopper load as it continued its takeoff and remained in the circuit. The fourth aircraft jettisoned its hopper load, rejected its takeoff, and taxied to pick up the accident pilot. There was sufficient impact force to activate the on-board 406- megahertz emergency locator transmitter, but the search-and-rescue satellite system did not detect a signal from the emergency locator transmitter until the wreckage was being recovered 6 days later.
The TSB’s findings, in part:
1. A wing stalled either independently or in combination with an encounter with a wing-tip vortex generated by the lead aircraft. This caused a loss of control moments after liftoff, and resulted in the right-hand wing tip contacting the water and in a subsequent water-loop.
2. The operator’s standard takeoff procedures did not specify a liftoff speed for scooping operations. Lifting off below the published power-off stall speed contributed to a loss of control at an altitude insufficient to permit a recovery.
3. The takeoff condition, with the aircraft heavy, its speed below the published power-off stall speed, and a high angle-of-attack contributed to the loss of control.
4. An understaffed management structure during organizational changes likely led to excessive workload for existing managers. This contributed to risks, contained within the standard operating procedures, not being addressed through the operator’s safety management system, resulting in continued aircraft operations below published minimum airspeed limitations.
The report states that Conair hired a safety manager and a company check pilot for the Fire Boss fleet before the 2015 spring training season started. And, Conair adopted a risk mitigation plan for 2015–2016, applicable to the company’s AT-802 fleet. The plan addresses issues mentioned in the TSB report, plus an additional issue identified in-house.
The year following the August 14, 2014 crash on Chantslar Lake there were three incidents that we are aware of that involved Conair AT-802’s:
2015, April 11: An engine failure on Air Tanker 699, an Air Tractor AT-802A, during training resulted in damage to a float upon landing. The incident occurred April 11, 2015 on Harrison Lake, BC, 33 nm NNE of Abbotsford.
Sky Aviation purchased four CH-46 helicopters in 2015.
Alyssa Gaulke of Sky Aviation sent us some photos of one of their CH-46E that is assigned on the Lava Mountain Fire 17 air miles northwest of Dubois, Wyoming — and we found more at their Facebook page.
This CH-46E is one of four that the Worland, Wyoming-based company acquired last year.