California

The four engine aircraft landed on a wet runway. After touchdown, it was unable to stop within the remaining distance, overran and came to rest 200 feet further on. All 45 occupants were uninjured and quickly disembarked while the aircraft was considered as damaged beyond repair due to severe damages to the fuselage.

At 0324LT, the crew informed ATC about his position at 9,000 feet vertical to Newhall and six minutes later, he obtained the permission to descend. At 0341LT, the aircraft hit the slope of Mt White located 14 miles south of Lebec and disintegrated on impact. All 11 occupants were killed. It appears that at the time of the accident, the aircraft was off track to the east by ten miles due to strong west winds, and it hit the mountain 75 feet below the summit.

Crashed in unknown circumstances into the Pacific Ocean off Point Arena, killing all six crew members who were returning to their base following a maritime patrol mission.
Crew:
Lt Jg W. Bulter,
Ems C. L. Coler,
Amm1 G. R. Spalding,
Amm1 W. W. Englehardt,
Arm1 T. M. Meleller,
Aom1 W. Zinkel.

Aircraft took off from Clovis Army Air Field in New Mexico, bound for Hamilton AAF in Marin County. The plane stopped at Mines Field in Los Angeles, refueled, retook to the skies at 2317LT and was due to arrive at Hamilton at 0117LT in the morning, but the pilot, according to the Army investigation, lost his way while trying to locate Hamilton Field. At around 0200LT in the morning, and five minutes from its destination, the pilot radioed Hamilton Field for radar assistance in landing. But, shortly after 0200LT, the engines of the bomber, starved of fuel, quit, and the bomber smashed into a 1300-foot peak of White's Hill, some nine miles short of the airfield. Striking the hill only six feet below its top, the plane bounced over the top, thudded across the rough terrain, and slid to a grinding halt that churned up earth and rock for more than 100 yards, and scattering wreckage for 300 yards. Dazed, confounded, and startled by the crash, the pilot and co-pilot extricated themselves out of the wreckage of his once-proud aircraft. Still trapped in the wreckage were five of their crew. Stumbling and clawing their way through the morning darkness towards the city lights they saw in the distant, they reached a retirement home, from which they alerted the airfield. Killed instantly in the First Lieutenant Milton M. Souza, 25, of Santa Clara. CA. and Master Sergeant E. B. Nichols, of Clovis, NM. Rescuers chopped a hole through the wreckage with an axe to extricate a Lieutenant Colonel from the fuselage. He was then strapped on a litter with his parachute shrouds and brought down the hillside. It took a total of six hours to free the five trapped men from the plane, two of whom were seriously injured.
Source:
http://www.check-six.com/Crash_Sites/Marin_B-17_crash.htm

The crew was conducting a test flight after the left engine has been replaced. Few minutes after takeoff, a failure occurred on the 8th cylinder in the left engine and the crew shut off this engine and returned to Hollywood-Lockheed Air Terminal Airport. Due to low visibility caused by foggy conditions, the crew was unable to locate the runway and decided to go around. During the second attempt to land, the captain decided to reduce his altitude to establish a visual contact with the ground when the aircraft hit an eucalyptus and crashed near Lorne Street, North Hollywood. The aircraft was destroyed by impact forces and a post crash fire and all three crew members were killed.

After takeoff from Oakland Airport, while climbing, the crew was instructed by ATC to maintain a minimum safe altitude of 3,000 feet or at least 500 feet above clouds. Shortly later, due to the deterioration of the weather conditions, the captain informed ground that he elected to return to Oakland Airfield. While completing a last turn to the right at an insufficient altitude, the twin engine aircraft hit tree tops then crashed in a wooded area located on the slope of Mt Diablo located east of Walnut Creek. The aircraft was destroyed by impact forces and both occupants were killed. At the time of the accident, the mountain was shrouded by clouds and the visibility was poor.

While flying at an altitude of 7,200 feet, the twin engine aircraft lost a part of its right wing and the empennage failed as well. Out of control, the aircraft dove into the ground, partially disintegrated in the air and eventually crashed on the slope of a mountain located in the Donner State Park, west of Hobart Mills. All 26 occupants were killed.
Crew:
Cpt Richard K. Young, pilot,
1st Lt Louis N. Duesing, copilot,
Sgt Antone J. Esgro, flight engineer.
Passengers:
Lyle C. Dykes,
Richard O. Ehlers,
Cpt Donald A. Bride,
Raymond L. Schneider,
Lt L. S. Stark,
Floyd R. Sundgren,
Lt Col Clyde M. Taylor,
1st Lt Ervin P. Cue,
Maurice L. Bose,
Charles R. Branass,
Pvt Glenn P. Dickerson,
Cpl William T. Woodhouse,
Pasqual Iuluicci,
Melvin S. Van Riper,
Lt Frank W. Davis,
Ens Gino C. Caletti,
Stephen R. Kirsch,
Gerald P. Udell,
Robet A. McGee,
Lt John C. Shaw,
1st Lt James E. Milton,
2nd Lt Richard F. Simpson,
Pvt Willie B. Wilson.

At 0559LT, the aircraft departed Tucson and routine position reports were subsequently received from the flight over Casa Grande, Gila Bend, and Yuma, Arizona. At 0754, the American Airlines radio operator at San Diego transmitted the 0750 weather report for San Diego: Indefinite ceiling 1,200 feet, broken clouds; visibility 8 miles. Receipt of this information was acknowledged by flight 6103 and immediately thereafter the flight reported that it had been over El Centro, California, at 0753 at 3,000 feet. Los angels Airway Traffic Control delivered a clearance for Flight 6103 to American Airlines radio station at San Diego clearing the flight to San Diego to cruise at 8,000 feet and to cross San Diego at an altitude of at least 500 feet above the overcast. The company station, in turn, attempted to relay the Airway Traffic Control clearance to the flight at 0812, however, after several attempts at establishing contact with the flight, Airway Traffic Control was advised that the clearance as not delivered. All further attempts to contact the flight were unsuccessful. Routine search procedures were initiated immediately and at 1305 aircraft of the Naval Air Control Center at San Diego reported sighting the wreckage of the airplane was spotted on the east slope of Thing Mountain, some 10 miles southeast of Pine Valley. The aircraft was destroyed by impact forces and all 25 occupants were killed.

Following several modifications, the aircraft was completing a test flight for a CAA certification and was carrying a NAA research engineer, one pilot and a CAA inspector. After its departure from Los Angeles-Mine Field, the twin engine aircraft flew to the northwest when an engine caught fire in flight. Out of control, the aircraft dove into the sea and crashed few miles off Malibu. All three occupants were killed.
Crew:
Joseph E. Barton, pilot,
Albon C. Cowles Jr., research engineer.
Passenger:
Mr. McCutcheon, CAA inspector.
Source: http://www.joebaugher.com/usaf_bombers/b25_20.html