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20090523008679I

Incident · Minor damage
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FAA incident report · Namer T-6G · Belmar/Farming, NJ · May 23, 2009

FAA Aviation Safety Information Portal

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Date
May 23, 2009 · 09:45 local
Place
Belmar/Farming, NJ
Airport
Monmouth Executive
Phase of flight
Landing
Operating rules
General operating rules (Part 91)
Damage
Minor damage
Aircraft
N25KP
Reported as
Namer T6G
Reported engine
Pratt & Whitney R1340*
People aboard
1
Fatal injuries
0
Other injuries
0
Pilot’s flight hours
1,230 total100 in this make and model7 in the last 90 days
N25KPRegistered now · North American T-6GS/N 49-3336AAirframe modelNorth American T-6G

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.

(-23) Pilot stated that after making an uneventful local flight, he entered the traffic pattern on downwind for rwy 14 at kblm and lowered the landing gear. He stated that he observed both left and right gear down gear lights and observed both the left and right "claws" (downlocks) in the locked position through the gear position windows located in the tops of both wings. He stated that he continued his approach and made a normal, full flaps, landing at 85 mph. He stated that after 500-700 yards on roll out without braking, at 20-25 mph, the right wing suddenly dropped and the aircaft made a violent right turn into the grass on the right side of the runway. Post incident investigation revealed that the right hand (RH) main landing gear (MLG) actuator rod end failed at its point of attachment to the right MLG actuator actuating rod. This is an indication that the spring loaded RH downlock was not engaged on landing and the gear was being supported soley by the actuator assembly, which failed as described above. Inspection of the RH downlock assembly showed it to be corrosion free, properly rigged and lubricated. Repeated swings of the RH gear could not reproduce a failure of the downlock to engage.

As the FAA filed it

(-23) PILOT STATED THAT AFTER MAKING AN UNEVENTFUL LOCAL FLIGHT, HE ENTERED THE TRAFFIC PATTERN ON DOWNWIND FOR RWY 14 AT KBLM AND LOWERED THE LANDING GEAR. HE STATED THAT HE OBSERVED BOTH LEFT AND RIGHT GEAR DOWN GEAR LIGHTS AND OBSERVED BOTH THE LEFT AND RIGHT "CLAWS" (DOWNLOCKS) IN THE LOCKED POSITION THROUGH THE GEAR POSITION WINDOWS LOCATED IN THE TOPS OF BOTH WINGS. HE STATED THAT HE CONTINUED HIS APPROACH AND MADE A NORMAL, FULL FLAPS, LANDING AT 85 MPH. HE STATED THAT AFTER 500-700 YARDS ON ROLL OUT WITHOUT BRAKING, AT 20-25 MPH, THE RIGHT WING SUDDENLY DROPPED AND THE AIRCAFT MADE A VIOLENT RIGHT TURN INTO THE GRASS ON THE RIGHT SIDE OF THE RUNWAY. POST INCIDENT INVESTIGATION REVEALED THAT THE RIGHT HAND (RH) MAIN LANDING GEAR (MLG) ACTUATOR ROD END FAILED AT ITS POINT OF ATTACHMENT TO THE RIGHT MLG ACTUATOR ACTUATING ROD. THIS IS AN INDICATION THAT THE SPRING LOADED RH DOWNLOCK WAS NOT ENGAGED ON LANDING AND THE GEAR WAS BEING SUPPORTED SOLEY BY THE ACTUATOR ASSEMBLY, WHICH FAILED AS DESCRIBED ABOVE. INSPECTION OF THE RH DOWNLOCK ASSEMBLY SHOWED IT TO BE CORROSION FREE, PROPERLY RIGGED AND LUBRICATED. REPEATED SWINGS OF THE RH GEAR COULD NOT REPRODUCE A FAILURE OF THE DOWNLOCK TO ENGAGE.