Consolidated PB4Y-2 Privateer

The airplane was maneuvering to deliver fire retardant when its left wing separated. Aircraft control was lost and the airplane crashed into mountainous terrain. A witness on the ground took a series of photographs that showed the air tanker's left wing separating at the wing root and the remaining airplane entering a 45-degree dive to the ground in a counterclockwise roll. An examination of the airplane wreckage revealed extensive areas of preexisting fatigue in the left wing's forward spar lower spar cap, the adjacent spar web, and the adjacent area of the lower wing skin. The portion of the wing containing the fatigue crack was obscured by the retardant tanks and would not have been detectable by an exterior visual inspection. An examination of two other air tankers of the same make and model revealed the area where the failure occurred on the accident airplane was in a location masked by the airplane's fuselage construction. The airplane was manufactured in 1945 and was in military service until 1956. It was not designed with the intention of operating as a firefighting airplane. In 1958, the airplane was converted to civilian use as an airtanker and served in that capacity until the time of the accident. The investigation revealed that the owner developed service and inspection procedures for the airtanker; however, the information contained in the procedures did not adequately describe where and how to inspect for critical fatigue cracks. The procedures were based on U.S Navy PB4Y-2 airplane structural repair manuals that had not been revised since 1948.

During the takeoff roll at Ramona Airport, the airplane went out of control, veered off runway and came to rest. While both pilots escaped uninjured, the airplane was damaged beyond repair.

During 1975, '13D was under contract to the US Department of the Interior and based at Anchorage, Alaska. Total flight time was approximately 1475 hours. On Friday, 8 August 197 5, the aircraft was being flown back to the lower 48 States from Anchorage with an eventual destination of Greybull, Wyoming. One engine had been shut down due to its running rough, and we understand that a planned fuel stop at Ketchikan, Alaska, was missed because of bad weather. Shortly after midnight on Saturday, 9 August, after seven hours of flight, BuNo 59876 ran out of fuel, and the engines that were still in operation began to quit! Luckily, they were over the northern tip of Vancouver Island, British Columbia, Canada, and below was the 5000 foot paved runway at Port Hardy. Unbelievably , during final approach with only one engine still running, the pilot considered he was too high to land and attempted to go-around! The aircraft struck the ground during the turn, crashed through the airport perimeter fence, crossed the rock and driftwood strewn beach, and came to rest in the ocean, approximately 100 yards offshore! When the radio operator in the control tower lost contact with the plane, he immediately sounded the alarm in the airport fire station. Since no aircraft, nor fire, could be seen, it was felt the plane must have gone down short of the airport, and a search was started in that area. When the aircraft finally came to a stop, the two-man crew was unsure of where they were and what had happened. Almost immediately, the cockpit started to fill with water, and the men struggled to climb out a roof escape hatch. After standing on top of the aircraft for a short while, they spotted a seat cushion floating by, grabbed it, and swam the hundred or so yards to shore. When they arrived on land, their legs were so cold they could not stand. After a short rest, the crew scrambled in the dark over logs and through bushes, and made it to the airport boundary fence. During this same time period, the fire and rescue crews decided the plane must have gone off the runway and into the ocean, so they returned to the airport to resume their search. As the pilot and copilot approached the fence, they saw an emergency vehicle speed toward them down the runway and then continue on by until it stopped at the hole in the fence where the plane had crashed through on its way to the ocean. A short time later, another truck arrived. They were able to get the attention of the driver by shouting and waving. The flight crew was taken to the fire hall where they were given blankets and hot drinks until an ambulance took them to the hospital for examination. Both the pilot and copilot received only minor injuries during their ordeal. The pilot was fired by H&P, but the copilot remained with the company, only to be killed in the crash of a C119 during 1980. N6813D received substantial damage to its nose gear and underbelly, and the left wing tip and flap were destroyed.
Source: http://pb4y-2.org/pdf/all.pdf

The crew departed Tucson Airport in the early morning on a firefighting mission in the region of Safford. While flying at low height over the forest in fire, the airplane struck trees and crashed in a mountain slope. The aircraft was totally destroyed and both occupants were killed.

Following a fire fighting mission in the region of Wenatchee, the crew was returning to Wenatchee-Pangborn Airport. On short final, the airplane crashed in flames short of runway threshold and came to rest. Both pilots were slightly injured and the aircraft was destroyed.

The crew was engaged in a firefighting mission and departed Medford Airport around noon. En route, three engines stopped and/or lost power and the crew lost control of the airplane that crashed into Diamond Lake. While the aircraft was damaged beyond repair, both crew members were injured.

The crew departed Greybull on a firefighting mission. While flying at low height, the aircraft went through the smoke when it struck tree tops and crashed in flames in a wooded area. Both pilots were killed.

The crew was engaged in a fire fighting mission near McGrath. While flying at low height, the airplane stuck the slope of a mountain and crashed, killing all four occupants.

The crew was involved in a supply mission to Kuomintang guerrillas in east Burma. While flying at low height, the four engine aircraft was shot down by the pilot of a Burma Air Force Hawker Sea Fury. Two crew members were able to bail out and were later recovered. Out of control, the Privateer crashed in the jungle located in a mountainous region of Doi Tung. Four other crew members were killed. The Burmese Hawker Sea Fury registered UB-466 was hit by return fire and crashed shorty later, killing its pilot Noel Peters.

Crashed in unknown circumstances. Crew fate unknown.