United States of America

During the activation of the crew oxygen system a fire erupted which consumed the entire pressure vessel. Representatives from the National Aeronautics and Space Administration's (NASA) Johnson Space Center (JSC), White Sands Testing Facility (WSTF), Las Cruces, New Mexico, examined the retained oxygen system components. Examination of these components revealed that the fire's initiation location was the first stage pressure reducer located in the oxygen regulator assembly.

The certificated commercial pilot, with five passengers aboard, was departing runway 18 on a scheduled commuter flight. The pilot stated that the flight's original departure time was delayed for two hours due to ice fog, and low visibility. He said that just after takeoff, the engine surged followed by a loss of power. The airplane collided with snow-covered terrain during an off-airport emergency landing, and sustained substantial damage to the propeller, fuselage, and wings. Following retrieval of the airplane, an FAA airworthiness inspector examined the airplane, and found no mechanical anomalies. While still attached to the airplane, the engine was started and run at idle. The engine later produced full power on an engine test stand. A pilot-rated Alaska State Trooper, with extensive experience in the accident airplane make and model, examined the airplane soon after the accident. He said the wings, horizontal stabilizer, and elevators had an accumulation of frost.

The non instrument-rated pilot attempted VFR flight into known instrument flight conditions after being briefed by an FAA Automated Flight Service Station that VFR flight was not recommended. The pilot encountered instrument flight conditions while maneuvering on initial takeoff climb, experienced an in-flight loss of control (stall/spin) due to failure to maintain airspeed, and subsequent in-flight collision with trees and terrain.

The Cessna 551, collided with trees and subsequently the ground following a missed approach to runway 10, at the Crisp County Airport in Cordele, Georgia. According to the Jacksonville Air Traffic Control Center, the pilot was given radar vectors to the outer marker and cleared him for the non-precision localizer approach to runway 10. Recorded radar data showed the airplane initiating the approach at 1900 feet mean sea level (MSL) as published. The airplane descended to 600 feet MSL as published and over-flew the airport. The controller stated that he was waiting for the missed approach call, as he observed the airplane climb to 700 feet MSL. The airplane then descended back to 600 feet MSL and disappeared from radar. The controller never received a missed approach call. A witness near the airport stated that he heard the airplane fly over but did not see it due to haze and fog.

The PIC was cleared for an ASR approach to the destination airport. The co-pilot was looking outside to obtain a visual reference on the destination airport. They broke out of the clouds at about 900 feet, and were descending at about 480 feet per minute. The ceiling was overcast, ragged, and very dark with no visible horizon. The co-pilot looked back inside the cockpit to check the radios when he heard a thump. The PIC had continued the descent below the minimum descent altitude, the airplane collided with the marsh and crashed.

On takeoff during the initiation of a cross-country flight, the pilot raised the landing gear following liftoff and the aircraft settled back onto the ground off the end of the runway. According to the pilot and the FAA inspector who examined the aircraft, both engines were producing normal power. The elevator trim was set at 12 degrees nose up vice 3-6 degrees required, and the aircraft was within weight and balance limits. The pilot lowered the landing gear prior to impact. According to information provided by the aircraft manufacturer, induced drag increases during landing gear retraction and extension due to the landing gear doors being extended into the air stream as the landing gear cycles.

After a 5-hour flight, the Westwind jet began its descent to the airport. Air traffic control instructed the flight crew to cross a VOR at 18,000 feet. The flight crew was then instructed to cross an intersection at 6,000 feet. The flight crew needed to descend the airplane 12,000 feet, in 36 nautical miles, to make the crossing restriction. The flight crew acknowledged the clearance, and no further transmissions were received from the airplane. The airplane struck treetops and impacted the ground in a wooded area. The accident flight was the airplane's first flight after maintenance. Work that was accomplished during the maintenance included disassembly and reassembly of the horizontal stabilizer trim actuator. Examination of the actuator at the accident site revealed that components of the actuator were separated and that they displayed no damage where they would have been attached. Examination of the actuator by the Safety Board revealed that the actuator had not been properly assembled in the airplane. A similar actuator was improperly assembled and installed in a static airplane for a ground test. When the actuator was run, the jackscrews of the actuator were observed backing out of the rod end caps within the first few actuations of the pitch trim toward the nose-down position. As the pitch trim continued to be actuated toward the nose-down position, the jackscrews became disconnected from the rod end caps, and the horizontal stabilizer became disconnected from the actuator. The passenger was Peter Lahaye, founder and owner of the Lahaye Laboratories and the aircraft.

Prior to takeoff from Lambert Field/St. Louis International Airport, St. Louis, Missouri, the pilot contacted the operations manager at M. Graham Clark Airport, Point Lookout, Missouri, and asked about the current weather conditions there. The operations manager told the pilot that the weather was "pretty poor." The airplane took off from St. Louis, at 1411 cst. At 1447:12 cst, the pilot checked in with Springfield Approach Control. The pilot was told to expect the ILS approach to runway 2 at the Springfield-Branson Regional Airport. At 1501:01 cst, the pilot requested to go to Point Lookout and shoot the GPS to runway 11. Springfield Approach instructed the pilot to descend to 3,000 feet msl and cleared him for the approach. At 1507:08 cst, Springfield radar showed the airplane crossing the initial waypoint at 3,000 feet msl, and turn to 116 degrees approach heading. At 1507:17 cst, the airplane descended to 2,500 feet msl. At 1508:51 cst, Springfield Approach cleared the pilot to change to advisory frequency. "Call me back with your cancellation or your miss." The pilot responded, "Okay we're, we're RAWBE inbound and we will call you on the miss or cancellation." The operations manager at M. Graham Clark Airport said that he heard the pilot on the airport's common frequency radio say, "Citation 525KL is RAWBE inbound on the GPS 11 approach." At 1509:01 cst, Springfield radar showed the airplane begin a descent out of 2,500 feet msl. The last radar contact was at 1509:48 cst. The airplane was five nautical miles from the airport on a 296 degree radial, at 2,100 feet msl. At 1530 cst, the operations manager heard Springfield approach trying to contact the airplane. The operations manager initiated a search for the airplane. At 1430 cst, the weather observation at the M. Graham Clark Airport was 300 feet overcast, rain and mist, 3/4 miles visibility, temperature 53 degrees F, winds variable at 3 knots, altimeter 29.92 inches HG. Approach minimum weather for the GPS RWY11 straight in approach to Point Lookout are a minimum ceiling of 600 feet and visibility of 1 mile for a category B aircraft. An examination of the airplane wreckage revealed no anomalies. The results of FAA toxicology testing of specimens from the pilot revealed concentrations of Doxepin in kidney and liver. The Physicians' Desk Reference states that "... drowsiness may occur with the use of this drug, patients should be warned of the possibility and cautioned against driving a car or operating dangerous machinery while taking the drug." The physician who prescribed the Doxepin to the pilot said that he was using it to treat the pilot's "irritable bowel" condition. According to his wife, the pilot had not slept well for several nights, up to the day of the accident, due to problems he was having with the FAA. A friend, who spoke with the pilot just before the accident flight, confirmed the pilot saying "I haven't slept for three days." The friend stated further that the pilot "wasn't himself that day."

The airline transport pilot departed on a CFR Part 135 scheduled passenger flight to a remote coastal village. When the flight did not return, an aerial search was initiated. The wreckage was located the following day along the pilot's intended route, about 49 miles from the departure airport. The airplane had collided with flat, featureless, snow-covered, terrain. A pilot that departed about one minute after the accident airplane's departure, had a similar route of flight. He characterized the weather conditions along the accident airplane's route as overcast, with ceilings ranging between 2,500 and 4,500 feet. He said that as he approached the area of the accident, he encountered 'a wall of weather' starting from the ground, with tops at 1,500 feet. He added that visibility was low, with fog and varied layers of cloud cover. The pilot stated that he changed his route in order to avoid the worsening weather conditions. He added that with satisfactory weather conditions, and given the intended destination of the accident airplane, the standard route of flight would be directly over the location of the accident site. No pre accident anomalies were noted with the accident airplane.

Witnesses reported that following takeoff from a river, the aircraft climbed to approximately 100 to 400 feet above the water, then initiated a left turn of approximately 45 degrees bank. The majority of the witnesses reported that after the aircraft had turned about 180 degrees, its nose abruptly dropped and it impacted the water. Witnesses did not report observing any evidence of problems with the aircraft before impact, and did not report hearing any abnormal engine sounds or sudden changes in engine pitch. Upon water impact, the aircraft went inverted and its cabin submerged. Efforts by witnesses to gain entry to the aircraft cabin to render assistance were unsuccessful due to aircraft damage. Rescue divers found all occupants deceased in the aircraft upon arrival, but were able to remove the two rear-seat victims without removing any passenger restraints. Autopsies disclosed that all four aircraft occupants had drowned. Investigators did not find any evidence of pre-impact aircraft or engine malfunctions during post-accident examinations of the wreckage, but did find that a cabin entry door was jammed shut due to impact damage, and that the range of travel of both pilot doors was restricted by damaged aircraft components.