Laredo

After takeoff from runway 35 at Saltillo-Plan de Guadalupe Airport, while climbing to an altitude of 800 feet, the crew encountered technical issues with the right engine that lost power and started to vibrate. The crew reduced his altitude and attempted an emergency landing when the aircraft crashed in bushes about 4,5 km northwest of the airport and came to rest. Both pilots were uninjured and the aircraft was damaged beyond repair.

The aircraft departed Santiago de Querétaro Airport on a night cargo flight to Laredo, Texas, carrying two pilots and a load consisting of automotive parts. En route, the crew encountered engine problems and was clearted to divert to San Luis Potosí-Ponciano Arriaga Airport for an emergency landing. On approach, the crew realized he could not make it and decided to attempt an forced landing. The airplane struck the ground, lost its undercarriage and came to rest in an agricultural area located in Peñasco, about 6 km northeast of runway 14 threshold. The left wing was bent and partially torn off. Both crew members escaped with minor injuries and the aircraft was damaged beyond repair.

The commercial pilot and passenger, who held a student certificate, departed runway 18R for a local flight in a multi-engine airplane. The pilot held a flight instructor certificate for single-engine airplane. Just after takeoff, the tower controller reported to the pilot that smoke was coming from the left side of the airplane. The pilot acknowledged, stating that they were going to "fix it," and then entered a left downwind for runway 18R, adding that they didn't need any assistance. The controller subsequently cleared the airplane to land on runway 18L, which the pilot acknowledged. Two witnesses reported seeing the smoke come from the left engine. Still images taken from airport security video show the airplane before making the turn to land with white smoke trailing and the landing gear down. The airplane was then seen in a steep left turn to final approach exceeding 90° of bank, before it impacted terrain, just short of the runway in a near vertical attitude. A postcrash fire ensued. The examination of the wreckage found that the left engine's propeller was not being driven by the engine at the time of impact. The left propeller was not in the feathered position and the landing gear was found extended. The damage to the right engine propeller blades was consistent with the engine operating at high power at impact. The examination of the airframe and engines revealed no evidence of preimpact anomalies; however, the examinations were limited by impact and fire damage which precluded examination of the hoses and lines associated with the engines. The white smoke observed from the left side of the airplane was likely the result of an oil leak which allowed oil to reach the hot exterior surfaces of the engine; however, this could not be verified due to damage to the engine. There was no evidence of oil starvation for either engine. Both the extended landing gear and non-feathered left propeller would have increased the drag on the airplane. Because the pilot's operating procedures for an engine failure in a climb call for feathering the affected engine and raising the landing gear until certain of making the field, it is unlikely the pilot followed the applicable checklists in response to the situation. Further, the change from landing on runway 18R to 18L also reduced the radius of the turn and increased the required angle of bank. The increased left banked turn, the right engine operating at a high-power setting, and the airplane's increased drag likely decreased the airplane airspeed below the airplane's minimum controllable airspeed (Vmc), which resulted in a loss of control.

On January 9, 2007, at 2323 central standard time, a Gates Learjet model 24F airplane, N444TW, serial number 348, was destroyed upon impact with terrain, about 18.8 nautical miles east of Guadalajara, State of Jalisco, in the Republic of Mexico. The airline transport-rated pilot and the commercial pilot functioning as first officer were fatally injured. The airplane was registered to the Sierra American Corporation of Wilmington, Delaware, and was being operated by Ameristar Jet Charter, Inc., of Addison, Texas, as Ameristar flight 878, a Title 14 Code of Federal Regulations Part 135 on-demand cargo flight. Night visual meteorological conditions prevailed and an instrument flight rules (IFR) flight plan was filed for the flight from Laredo, Texas. The cargo flight had originated in Laredo, Texas, at about 2210, with the Don Miguel Hidalgo International Airport (MMGL) near Guadalajara, Mexico, as its intended destination. Mexican Air Traffic Control personnel reported that the flight had approached MMGL from the north. At 2313, Guadalajara Approach Control cleared the flight to descend to 12,000 feet, provided an altimeter setting of 30.28, and told the flight to expect radar vectors for the ILS runway 28 approach to MMGL. After being provided a vector of 190 to intercept the localizer for the ILS runway 28 approach, there were communications between the flight and the controller to clarify which runway was active, and at 2318:00, the flight was given a right turn to a heading of 200 degrees. At 2318:56 the flight was cleared to descend to 10,000 feet, and at 2320:38, the flight was cleared to descend to 9,000 feet. The airplane was last observed on radar descending through 9,200 feet, while crossing the GDL VOR 085 degree radial.

On September 16, 2003, at 1430 central daylight time, an Aero Commander 690 twin-engine airplane, N302WB was destroyed upon impact with trees and terrain while attempting a takeoff from an airstrip near Soto La Marina, in the State of Tamaulipas, in the Republic of Mexico. The commercial pilot, sole occupant of the airplane, was fatally injured. The airplane was registered to the QEAT-4 LLC., in Naples, Florida, and was being operated by the MGS Corporation of Laredo, Texas. Visual meteorological conditions prevailed for the business flight for which no flight plan was filed. The flight's destination was reported to be Laredo, Texas. Local authorities reported that the turboprop powered airplane, serial number 11003, had previously sustained some damage to the nose landing gear and the owner had replaced the nose landing gear prior to attempting to depart from the airstrip.

The crew was completing a local post maintenance test flight at Laredo Airport. After several touch-and-goes, the aircraft was in initial climb when the left engine lost power, followed shortly later by the right engine. The crew reduced his altitude and ditched the aircraft in the Casa Blanca Lake, about 50 feet from the shore. All three crew members were evacuated safely while the aircraft sank in six feet of water.

After departing on an IFR flight in VFR conditions, the flight had been cleared to climb from 3,000 to 4,000 feet, when the right engine lost power. The pilots diverted toward an uncontrolled airport, secured the right engine, & cancelled their IFR clearance. They made an approach to land on runway 15, then attempted a single engine go-around. During the go-around, the airplane yawed/rolled to the right in what the passenger believed was a VMC roll. It then struck power lines & crashed in a right wing low attitude. Investigation revealed that both pilots held multi-engine ratings. The owner said the pilot (PIC) had flown the airplane for a short time on 12/21/98; however, no other record was found to verify that either the pilot or copilot had flight experience in this make/model of airplane. Examination of the wreckage revealed evidence that the flaps were retracted, the landing gear was in transit, the left propeller was operating with power, & the right propeller was feathered. The airplane had a history of fuel flow fluctuations in the right engine. The diaphragm (P/N 364446) in the right engine distributor valve assembly was found ruptured. It was an old style diaphragm, which was colored black. Bendix Service Bulletin RS-76, issued 11/15/80, called for replacement of the black diaphragm with a red fluorosilicone diaphragm (P/N 245088) at overhaul. The engine was overhauled in June 1992. During maintenance in December 1997, both fuel system injectors & nozzles were tested; however, the distributor valve assembles were not tested. Calculations showed the airplane was loaded 116.3 lbs over the maximum allowable gross weight & 1.3 inches forward of the allowable CG range.

Radar data showed the airplane tracking north of the planned route. It made several heading changes, and descended to 500 feet msl. The pilot advised ATC that he was landing at Shreveport, and was assigned a transponder code. No further transmissions were received by ATC. The airplane impacted transmission lines, poles, and trees approx 19 miles northwest of the airport. Examination of the propellers revealed that the right spinner dome marks equated to 74°; the operating range is 17-35°. The three blades of the left propeller showed only leading edge damage at the tips. Examination of the right engine revealed the following: carbon buildup in the exhaust and intake manifolds, exhaust valves pitted and scored, valve seats worn and pitted, spark plugs worn, compression below 60 on 4 cylinders, and a separated magneto block with pitting and fretting. Time since last annual inspection by operator maintenance personnel was 78 hrs. The left engine and accessories were extensively damaged by fire. The pilot, sole on board, was killed.

The airplane broke up in flight while descending from FL240. The horizontal stabilizer, or top of the T-type tail, had separated from the fuselage before ground impact. Examination revealed that the 47 screw fasteners that would have attached the upper surface of the leading edge assembly for the left side of the horizontal stabilizer were missing. They had been removed the night before during scheduled maintenance. Investigation revealed that there was a lack of compliance with the FAA-approved general maintenance manual procedures by the mechanics, inspectors, and supervisors responsible for assuring the airworthiness of the airplane the night before the accident. In addition, routine surveillance of the continental express maintenance department by the FAA was inadequate and did not detect deficiencies, such as those that led to this accident. All 14 occupants were killed.

The pilot stated that during takeoff from runway 35L, the copilot on the flight controls reduced left propeller and right engine power at an altitude of less than 100 feet agl. He attempted to restore takeoff power while applying forward pressure on the control yoke, but lost control of the aircraft and impacted the terrain adjacent to the departure runway. He further stated that the cargo may have shifted to the rear of the aircraft during takeoff. The aircraft was destroyed and both pilots were seriously injured.