# Accident 19991004043919A: Cessna 421B, Montague, CA, October 4, 1999

- Type: FAA accident report (Accident/Incident Data System), as reported
- Date: October 4, 1999, 23:45 local time
- Place: Montague, CA
- Airport: Montague-Yreka Rohrer Field
- Damage: Substantial damage
- Phase of flight: Roll-Out (Fixed Wing)
- Operating rules: General operating rules (Part 91)
- Location: 41.7599° N, 122.3909° W: From the FAA, an estimate near the named town, within about 3 miles
- Nearby events: https://openairdocs.org/map.md?lat=41.7599&lon=-122.3909&mi=10
- Aircraft: N69GP, a cancelled registration (https://openairdocs.org/deregistered/N69GP-2002-11-18) (OpenAirDocs)
- Registry model: Cessna 421B (registry code 2076014, https://openairdocs.org/model/cessna-421b) (OpenAirDocs)
- Registry engine: Continental GTSIO-520-C (registry code 17035, https://openairdocs.org/engine/continental-gtsio-520-c) (OpenAirDocs)
- Reported make and model: CESSNA 421B
- People aboard: 5
- Fatal injuries: 0
- Pilot flight hours: 7,200 total, 153 in this make and model
- NTSB investigation: [NTSB LAX00LA004](https://openairdocs.org/ntsb/LAX00LA004) (OpenAirDocs)
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/19991004043919A

## Narrative

As the FAA filed it, in capitals; the FAA replaces private details with ^PRIVACY DATA OMITTED^.

(-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.

## The NTSB's investigation of this event (1)

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

- [NTSB LAX00LA004](https://openairdocs.org/ntsb/LAX00LA004), Oct 5, 1999: Cessna 421B (N69GP), Montague, CA, substantial damage. Probable cause: The collapse of the left main landing gear during the landing rollout for undetermined reasons, which resulted in the pilot's loss of directional control.

From the FAA Accident/Incident Data System. Reports are matched to registry aircraft 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. For accidents, the NTSB's own investigation is the fuller record.

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