Two deteriorated locknuts were largely to blame for last year’s P-51 crash at the National Championship Air Races in Reno, Nev., according to an August 27 report by the National Transportation Safety Board’s (NTSB). The accident killed the pilot and 10 spectators, injuring 60 others. The report said the bad locknuts allowed the trim-tab attachment screws to loosen, initiating a crack in one.
There’s no better way to start off an EAA AirVenture show in Oshkosh, Wis., with a little flying out of the world’s busiest airport (during the week-long show, at least). Last year, the Gobosh folks were kind enough to invite me to fly the Gobosh 700A Light Sport Aircraft (LSA). This year, Remos Aircraft is demonstrating its newest LSA, the GX NXT, a high-wing composite two-seater powered by a 100-hp Rotax 912ULS.
Pelzer Consult has its own solution to cabin noise in the form of new “closed sandwich” trim tab technology. Conventional trim panels, said the Swiss acoustic products supplier, create an undesired loudspeaker effect.
Hawker Beechcraft King Air C90A, Emporia, Kan., Sept. 22, 2007–Following a severe high-frequency vibration in flight and an emergency landing, the King Air pilot found the right elevator trim tab push rod was broken. The NTSB blamed the incident on the improper installation of the trim tab attachment hardware by maintenance personnel, which resulted in excessive wear, fatigue and failure of the push-pull tube.
RAYTHEON BEECH 1900D, ALBANY, N.Y., OCT. 16, 2003–During the takeoff roll of a Beech 1900, operated by CommutAir as Continental Connection Flight 8718, the flight crew was unable to rotate the airplane and aborted the takeoff uneventfully. Examination revealed that when the elevator trim wheel in the cockpit was positioned to neutral, the elevator trim was actually in the full nose-down position.
Cessna Citation 550 Bravo, Bethany, Okla., May 20, 2002–The NTSB determined that the cause of N13VP’s runway overrun during an aborted takeoff from Wiley Post Airport was the anomalous elevator trim system and the pilot’s failure to note its improper setting before takeoff. The aircraft was substantially damaged when it hit two fences, but there were no fatalities or serious injuries among the five passengers and ATP pilot.
BEECH 1900D, HYANNIS, MASS., AUG. 26, 2003–At approximately 7:38 p.m. EDT Beech N240CJ, operated by Colgan Air, crashed after takeoff from Runway 24 at Barnstable Municipal Airport (HYA) in Hyannis. Both pilots–captain Scott Knabe, 39, and first officer Steven Dean, 38–the only occupants, were killed and the aircraft was destroyed.
The NTSB has recommended that the FAA require an aural trim-in-motion warning in the Cessna CitationJet 525 to alert pilots of a runaway trim. The Safety Board made the recommendation, along with three others that address runaway trim, last month in response to the 2003 Citation 525 crash in Coupeville, Wash., in which the pilot was forced to ditch the aircraft in the waters near Whidbey Island following a runaway trim.
Cessna Citation 550 Bravo, Bethany, Okla., May 20, 2002–Despite a trouble-free preflight and taxi at Wiley Post Airport, Bethany, the Citation’s nosegear failed to come off the runway on the takeoff roll. Aborting the takeoff, the pilot veered to the right to avoid hitting the localizer antennas. Skid marks measured 1,765 feet leading
Cessna Citation 550 Bravo, Bethany, Okla., May 20, 2002–Citation N13VP was substantially damaged when it hit a perimeter fence and road during a runway overrun after an aborted takeoff at the Wiley Post Airport. The ATP-rated pilot and four passengers were not injured. One passenger sustained minor injuries. VMC prevailed and an IFR flight plan was filed for the Part 91 business flight.
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