# NTSB FTW02LA032: Aero Commander 200D, N28PC, Houston, TX, November 13, 2001 - Type: NTSB accident investigation - Classification: Accident · No injuries · Limited investigation · Final report - Date: November 13, 2001, 09:20 local (15:20 UTC) - Place: Houston, TX - Coordinates: 29.610418, -95.119148 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=29.6104&lon=-95.1191&mi=10 - Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping) - Highest injury: No injuries - Injuries: 1 uninjured - Status: Completed, report May 21, 2002 - Report: Approved by Office Director - Parties: Federal Aviation Administartion - NTSB case key (mKey): 53757 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=FTW02LA032 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/53757/pdf - Page: https://openairdocs.org/ntsb/FTW02LA032 ## Probable cause the failure of the left outboard elevator attachment, which resulted in the partial separation of the left elevator and induced an airframe vibration. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - Airframe/component/system failure/malfunction, cruise - normal - flight control,elevator attachment - failure (cause) - flight control,elevator - separation - airframe - vibration - precautionary landing - performed, pilot in command ## Analysis The airplane departed on an IFR flight plan and ten minutes had elapsed when a vibration in the airframe was felt, which gradually intensified. The pilot observed that the horizontal stabilizer was shaking with more intensity than the rest of the airplane. The vibration continued to intensify to the degree that the cockpit instruments were unreadable. The pilot declared an emergency to air traffic control and initiated an emergency descent. He then slowed the airplane to 120 knots and the vibration subsided; however, the vibration was still apparent. Subsequently, the airplane landed, and when the pilot exited the airplane, he observed that the left elevator was hanging 3-4 inches low, at the outboard end. Examination of the airplane by an FAA inspector revealed that the outboard left elevator hinge had separated from the horizontal stabilizer. A section of the aft spar had separated from the horizontal stabilizer and remained attached to the elevator hinge. Additionally, the left elevator trim tab push rod had separated in two places. Approximately 10 flight hours prior to the accident, several dents were found on the left elevator. The repair station reported that during the repair, rivets on a portion of the elevator were removed, and then replaced while the elevator remained attached the horizontal stabilizer. They added that no abnormal stresses were placed on the elevator hinge attachments during the repairs. ## Factual narrative On November 13, 2001, at 0920 central standard time, an Aero Commander 200D, N28PC, was substantially damaged when it experienced an airframe structural failure while in cruise flight near Houston, Texas. The airplane was registered to three private individuals and operated by one of the individuals. The commercial pilot, who was the sole occupant of the airplane, was not injured. Visual meteorological conditions prevailed and an instrument flight rules (IFR) flight plan was filed for the 14 Code of Federal Regulations Part 91 personal flight. The flight originated from the West Houston Airport, Houston, Texas, at 0915, and was destined for Mineral Wells, Texas. According to the pilot, he departed Houston and ten minutes had elapsed when the airplane "started vibrating, a little at first, then gradually more." When the airplane starting vibrating, it was flying level at 4,000 feet, at an airspeed of 165 mph, and there was no turbulence. The pilot visually checked the wings and tail surfaces, and observed that the horizontal stabilizer was shaking with more intensity than the rest of the airplane. The vibration continued to intensify to the degree that the flight and engine instruments in the cockpit were unreadable. The pilot declared an emergency to air traffic control and initiated an emergency descent toward the David Wayne Hooks Memorial Airport, Houston, Texas. He then slowed the airplane to 120 knots and the vibration subsided; however, the vibration was still apparent. He added that the elevator control was responsive to control inputs. Subsequently, the airplane landed at the David Wayne Hooks Airport. After the pilot exited the airplane, he observed that the left elevator was hanging 3-4 inches low, at the outboard end. Examination of the airplane by an FAA inspector revealed damage to the elevator and horizontal stabilizer. The outboard left elevator hinge had separated from the horizontal stabilizer. A section of the aft spar had separated from the horizontal stabilizer and remained attached to the elevator hinge. The left elevator trim tab push rod had separated in two places. On September 1, 2001, the airplane underwent an annual inspection, at which time it had accumulated a total of 2,823.4 hours. On October 29, 2001, according to a work order (No. 11061) from Calkins Aero Service, Inc. Houston, Texas, several dents on the left elevator were repaired. The work order stated that the left elevator end cap and balance weight were removed from the airplane, and the damaged areas were repaired. During the repairs, rivets on a portion of the elevator were removed and then replaced while the elevator remained attached to the horizontal stabilizer. The balance weight and end cap were then reinstalled. Caulkins Aero stated that no abnormal stresses were placed on the elevator hinge attachment points during the repairs. The work order revealed that the airplane had accumulated a total of 2,889.0 hours at the time that the work was completed. At the time of the accident, the airplane had accumulated a total of 2,900.0 hours. ## Aircraft - Registration: [N28PC](https://openairdocs.org/aircraft/N28PC), registered now, S/N 377, built 1967 (OpenAirDocs) - Reported make and model: Aero Commander 200D - Registry model: [Aero Commander 200D](https://openairdocs.org/model/aero-commander-200d) (registry code 0140312) (OpenAirDocs) - Registry engine: [Continental IO-520 series](https://openairdocs.org/engine/continental-io-520-series) (registry code 17032, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: 377 - Airframe hours: 2900 - Engines: Continental IO-520 285 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Operator: Gerald Walker, doing business as N/A - Registered owner: David A. Pyle, Frank M. Gilley, Gerald Walker - Airworthiness certificate: Standard, Normal - Last inspection: Annual, September 1, 2001, 77 hours before - Departed: IWS, Houston, TX - Destination: MWL, Mineral Wells, TX - Flight plan: IFR - Airport: DWH, David Wayne Hooks Memorial, runway 17R, 7,009 × 100 ft, asphalt ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 50; injuries: none; student; airplane ratings: single-engine land; instrument ratings: airplane; medical: class 2, valid medical--w/ waivers/lim; last flight review October 15, 2001; seat: left; flight hours: 458 total, 108 in this make and model, 373 as pilot in command, 101 in the last 90 days, 32 in the last 30 days, 0 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Wind: calm - Visibility: 3 statute miles - Lowest ceiling: none - Temperature: 64 °F, dew point 61 °F - Altimeter: 30.22 inHg - Observed at: DWH ## FAA reports on this event (1) The FAA's own accident and incident reports, matched to the aircraft by N-number and date (OpenAirDocs). - [Accident 20011113030059A](https://openairdocs.org/incident/20011113030059A), Nov 13, 2001: Propjt 200D, Houston, TX, Substantial damage. (.19) On November 13, 2001, at 0920 central standard time, an aero commander 200D, N28PC, was substantially damaged in cruise flight after experiencing an… From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.