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NTSB Report
March 7, 1990 · Cessna 402B · N3128K
Alamogordo, NM
Overview
Report Status
Probable Cause
Event Type
Accident
Date
March 7, 1990
Injury Outcomes
No injuries (1 uninjured)
Location
Alamogordo, NM
Aircraft
Cessna 402B
Tail Number
N3128K
Operator
New Mexico Flying Service
Injuries
None
Aircraft Damage
Substantial
NTSB Number
DEN90LA071
THE RIGHT LANDING GEAR MADE A LOUD NOISE DURING RETRACTION AND THE GEAR 'UNLOCKED' LIGHT REMAINED ON. THE COMMERCIAL PILOT OF THE AIR TAXI CARGO FLIGHT FLEW BY A CONTROL TOWER AT HOLLOMAN AIR FORCE BASE FOR A VISUAL CHECK OF THE LANDING GEAR. TOWER PERSONNEL WERE ABLE TO CONFIRM THE GEAR DID NOT APPEAR TO BE LOCKED DOWN. DURING LANDING ROLL, THE RIGHT MAIN LANDING GEAR FOLDED, THE PLANE SWERVED TO THE RIGHT AND CAME TO REST OFF THE RIGHT SIDE OF THE RUNWAY. A POSTACCIDENT INVESTIGATION REVEALED THAT THE TORQUE TUBE BRACKET ASSEMBLY HAD FAILED AND RESULTED IN THE GEAR DOWN LOCK ASSEMBLY MALFUNCTION.
NTSB Probable Cause
THE COLLAPSE OF THE RIGHT MAIN LANDING GEAR AS A RESULT OF THE MALFUNCTION OF THE DOWN LOCK ASSEMBLY AND FAILURE OF THE TORQUE TUBE BRACKET ASSEMBLY.
Full Narrative
THE RIGHT LANDING GEAR MADE A LOUD NOISE DURING RETRACTION AND THE GEAR 'UNLOCKED' LIGHT REMAINED ON. THE COMMERCIAL PILOT OF THE AIR TAXI CARGO FLIGHT FLEW BY A CONTROL TOWER AT HOLLOMAN AIR FORCE BASE FOR A VISUAL CHECK OF THE LANDING GEAR. TOWER PERSONNEL WERE ABLE TO CONFIRM THE GEAR DID NOT APPEAR TO BE LOCKED DOWN. DURING LANDING ROLL, THE RIGHT MAIN LANDING GEAR FOLDED, THE PLANE SWERVED TO THE RIGHT AND CAME TO REST OFF THE RIGHT SIDE OF THE RUNWAY. A POSTACCIDENT INVESTIGATION REVEALED THAT THE TORQUE TUBE BRACKET ASSEMBLY HAD FAILED AND RESULTED IN THE GEAR DOWN LOCK ASSEMBLY MALFUNCTION.
Flight
Event TypeAccident
Event Time19:03 MST
Nearest AirportAlamogordo (0nm N)
Runway21
Runway Length7005 ft
Runway Width150 ft
Flight Plan FiledVFR
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftCessna 402B
Tail NumberN3128K
Aircraft CategoryAir
DamageSubstantial
OperatorNew Mexico Flying Service
Operating RulePart 135
Engines2
Engine TypeReciprocating
Engine DetailsContinental · TSIO-520E · Reciprocating · 300
Seats2
People & Injuries
Injury SummaryNo injuries (1 uninjured)
Fatal0
Serious0
Minor0
Uninjured1
Total1
Crew 1Age 42 · Second Class
Conditions
ConditionsVMC
LightDark Night
Wind190° @ 14 kt
Visibility20 sm
CeilingBroken clouds 20000 ft
Temperature / Dew Point64 F / 36 C
Altimeter29.00 inHg
Weather SourcePILO