OpenAirDocs.org

19990514041419A

Accident · Substantial damage
Open the Markdown

FAA accident report · Beech B100 · Hickory, NC · May 14, 1999

FAA Aviation Safety Information Portal

© OpenStreetMap
Date
May 14, 1999 · 00:03 local
Place
Hickory, NC
Airport
Hickory Regional Airport
Phase of flight
Level Off Touchdown
Operating rules
General operating rules (Part 91)
Damage
Substantial damage
Aircraft
N924RM
NTSB investigation
NTSBATL99LA086
Reported as
Beech B100
Reported engine
Garrett TPE331*
People aboard
4
Fatal injuries
0
Pilot’s flight hours
25,400 total1,200 in this make and model

From the FAA’s Accident/Incident Data System (AIDS), through its Aviation Safety Information Portal, as reported. The NTSB investigates accidents separately, and its record of an accident is the fuller one. The aircraft is matched to the registry by N-number and event date, checked against the reported make and model; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.

What happened

The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.

(.4) While on approach, the pilot placed the landing-gear handle in the down position but the right main gear did not extend. All attempts to extend the right main gear failed. The pilot landed on the left main gear and the nose wheel. The right wing settled to the runway and the airplane veered off the right side of the runway and collided with a ditch. A post-accident inspection of the landing gear system by the FAA revealed that the right main gear drive shaft had been sheared, disabling the actuator. Examination of the actuator parts revealed that the ring gear was missing one tooth and the pinion gear, which meshes with the ring gear, had missing and damaged teeth. Examination of the upper and lower thrust bearings revealed that the lower thrust bearing had been installed in reverse. The type of damage the ring and pinion gears exhibited indicated that the gears were not meshing properly. A thrust bearing installed in reverse could create an interference condition between the gears.

As the FAA filed it

(.4) WHILE ON APPROACH, THE PILOT PLACED THE LANDING-GEAR HANDLE IN THE DOWN POSITION BUT THE RIGHT MAIN GEAR DID NOT EXTEND. ALL ATTEMPTS TO EXTEND THE RIGHT MAIN GEAR FAILED. THE PILOT LANDED ON THE LEFT MAIN GEAR AND THE NOSE WHEEL. THE RIGHT WING SETTLED TO THE RUNWAY AND THE AIRPLANE VEERED OFF THE RIGHT SIDE OF THE RUNWAY AND COLLIDED WITH A DITCH. A POST-ACCIDENT INSPECTION OF THE LANDING GEAR SYSTEM BY THE FAA REVEALED THAT THE RIGHT MAIN GEAR DRIVE SHAFT HAD BEEN SHEARED, DISABLING THE ACTUATOR. EXAMINATION OF THE ACTUATOR PARTS REVEALED THAT THE RING GEAR WAS MISSING ONE TOOTH AND THE PINION GEAR, WHICH MESHES WITH THE RING GEAR, HAD MISSING AND DAMAGED TEETH. EXAMINATION OF THE UPPER AND LOWER THRUST BEARINGS REVEALED THAT THE LOWER THRUST BEARING HAD BEEN INSTALLED IN REVERSE. THE TYPE OF DAMAGE THE RING AND PINION GEARS EXHIBITED INDICATED THAT THE GEARS WERE NOT MESHING PROPERLY. A THRUST BEARING INSTALLED IN REVERSE COULD CREATE AN INTERFERENCE CONDITION BETWEEN THE GEARS.

NTSB investigation

The NTSB’s investigation of this event, with its probable cause and findings. Matched to this report by N-number and date.

NTSB ATL99LA086Accident · No injuriesLimited investigationFinal reportHickory, NCThe failure of the landing gear actuator due to the improper installation of the lower thrust bearing by maintenance personnel.May 14, 1999 · Substantial damage