19991004043919A

Accident · Substantial damage

FAA accident report · Cessna 421B · Montague, CA · October 4, 1999

Date
October 4, 1999 · 23:45 local
Place
Montague, CA
Airport
Montague-Yreka Rohrer Field
Phase of flight
Roll-Out (Fixed Wing)
Operating rules
General operating rules (Part 91)
Damage
Substantial damage
Aircraft
N69GP
NTSB investigation
NTSBLAX00LA004
Reported as
Cessna 421B
People aboard
5
Fatal injuries
0
Pilot’s flight hours
7,200 total153 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.

(-23) Left main landing gear (MLG) collapsed on roll-out causing a/c to veer off runway striking several parked a/c. teh a/c was declared totaled by the insurace company who after requesting received permission from NTSB to disassemble, and relocate the a/c, as a result the FAA was unable to examine the a/c at the scene. However, the FAA did interview two airframe and powerplant mechanics who after examining the left MLG, agreed that it was out of rig, which could have contributed to this accident. (.4) the pilot landed, and about 500 to 800 feet beyond his touchdown point, the left main landing gear collapsed. He attempted to maintain direction control with aileron and rudder, but the airplane continued to veer left off the runway toward the ramp area. Before coming to a stop, the right side of the airplane impacted the left wing of a parked Cessna P210N, causing substantial damage to both aircraft. The Cessna P210N then spun around, came out of its tie down chains, and collided with a parked Cessna 150K, inflicting minor damage to it. The pilot reported that all three green landing gear down indicator lights had been illuminated prior to landing. The postcras h examination of the airplane revealed that the left landing gear had retracted up into the gear well, and the nose gear and the right gear appeared to be undamaged. Examination of the landing gear and the associated extension/retraction systems failed to disclose a cause for the collapse. The pilot reported that he hadn't experienced any mechanical problems with the aircraft prior to the accident. He estimated that the winds at the accident airport were from approximately 200 degrees at less than 5 knots.

As the FAA filed it

(-23) LEFT MAIN LANDING GEAR (MLG) COLLAPSED ON ROLL-OUT CAUSING A/C TO VEER OFF RUNWAY STRIKING SEVERAL PARKED A/C. TEH A/C WAS DECLARED TOTALED BY THE INSURACE COMPANY WHO AFTER REQUESTING RECEIVED PERMISSION FROM NTSB TO DISASSEMBLE, AND RELOCATE THE A/C, AS A RESULT THE FAA WAS UNABLE TO EXAMINE THE A/C AT THE SCENE. HOWEVER, THE FAA DID INTERVIEW TWO AIRFRAME AND POWERPLANT MECHANICS WHO AFTER EXAMINING THE LEFT MLG, AGREED THAT IT WAS OUT OF RIG, WHICH COULD HAVE CONTRIBUTED TO THIS ACCIDENT. (.4) THE PILOT LANDED, AND ABOUT 500 TO 800 FEET BEYOND HIS TOUCHDOWN POINT, THE LEFT MAIN LANDING GEAR COLLAPSED. HE ATTEMPTED TO MAINTAIN DIRECTION CONTROL WITH AILERON AND RUDDER, BUT THE AIRPLANE CONTINUED TO VEER LEFT OFF THE RUNWAY TOWARD THE RAMP AREA. BEFORE COMING TO A STOP, THE RIGHT SIDE OF THE AIRPLANE IMPACTED THE LEFT WING OF A PARKED CESSNA P210N, CAUSING SUBSTANTIAL DAMAGE TO BOTH AIRCRAFT. THE CESSNA P210N THEN SPUN AROUND, CAME OUT OF ITS TIE DOWN CHAINS, AND COLLIDED WITH A PARKED CESSNA 150K, INFLICTING MINOR DAMAGE TO IT. THE PILOT REPORTED THAT ALL THREE GREEN LANDING GEAR DOWN INDICATOR LIGHTS HAD BEEN ILLUMINATED PRIOR TO LANDING. THE POSTCRAS H EXAMINATION OF THE AIRPLANE REVEALED THAT THE LEFT LANDING GEAR HAD RETRACTED UP INTO THE GEAR WELL, AND THE NOSE GEAR AND THE RIGHT GEAR APPEARED TO BE UNDAMAGED. EXAMINATION OF THE LANDING GEAR AND THE ASSOCIATED EXTENSION/RETRACTION SYSTEMS FAILED TO DISCLOSE A CAUSE FOR THE COLLAPSE. THE PILOT REPORTED THAT HE HADN'T EXPERIENCED ANY MECHANICAL PROBLEMS WITH THE AIRCRAFT PRIOR TO THE ACCIDENT. HE ESTIMATED THAT THE WINDS AT THE ACCIDENT AIRPORT WERE FROM APPROXIMATELY 200 DEGREES AT LESS THAN 5 KNOTS.

NTSB investigation

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