What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
(-23) Airworthiness directive (AD) 76-14-07/R2 applies to the aircraft's main landing gear saddles (left and right main gear). This AD has two basic parts, (replacement of the saddles and an annual dye penetrant inspection of the new saddles). The initial replacement of the saddles was complied with, but the annual requirement to do a dye penetrant inspection of the saddles was never recorded nor was an amoc. The left main landing gear saddle failed at the location identified in the AD for the dye penetrant inspections. The area of the saddle that failed showed water-marking signs in the metal. This failure occurred during a gear extension for landing. The left gear was unable to achieved the down and locked position. The pilot could see the left gear was not completely extended and the unsafe light verified this. The pilot elected to land with the nose and right main gear down and locked causing damage to the left fuselage belly, left wing tip, left elevator and the left vertical stabilizer.
As the FAA filed it
(-23) AIRWORTHINESS DIRECTIVE (AD) 76-14-07/R2 APPLIES TO THE AIRCRAFT'S MAIN LANDING GEAR SADDLES (LEFT AND RIGHT MAIN GEAR). THIS AD HAS TWO BASIC PARTS, (REPLACEMENT OF THE SADDLES AND AN ANNUAL DYE PENETRANT INSPECTION OF THE NEW SADDLES). THE INITIAL REPLACEMENT OF THE SADDLES WAS COMPLIED WITH, BUT THE ANNUAL REQUIREMENT TO DO A DYE PENETRANT INSPECTION OF THE SADDLES WAS NEVER RECORDED NOR WAS AN AMOC. THE LEFT MAIN LANDING GEAR SADDLE FAILED AT THE LOCATION IDENTIFIED IN THE AD FOR THE DYE PENETRANT INSPECTIONS. THE AREA OF THE SADDLE THAT FAILED SHOWED WATER-MARKING SIGNS IN THE METAL. THIS FAILURE OCCURRED DURING A GEAR EXTENSION FOR LANDING. THE LEFT GEAR WAS UNABLE TO ACHIEVED THE DOWN AND LOCKED POSITION. THE PILOT COULD SEE THE LEFT GEAR WAS NOT COMPLETELY EXTENDED AND THE UNSAFE LIGHT VERIFIED THIS. THE PILOT ELECTED TO LAND WITH THE NOSE AND RIGHT MAIN GEAR DOWN AND LOCKED CAUSING DAMAGE TO THE LEFT FUSELAGE BELLY, LEFT WING TIP, LEFT ELEVATOR AND THE LEFT VERTICAL STABILIZER.
NTSB investigation
The NTSB’s investigation of this event, with its probable cause and findings. Matched to this report by N-number and date.
Other reports on N4974U · 2
Matched to the same aircraft by N-number and date.