ASN Wikibase Occurrence # 362492
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| Date: | Thursday 21 January 1993 |
| Time: | 18:00 LT |
| Type: |  Grumman G-164A Ag-Cat |
| Owner/operator: | San Joaquin Helicopters, Inc. |
| Registration: | N6654 |
| MSN: | 777 |
| Total airframe hrs: | 4423 hours |
| Engine model: | P&W R-1340 |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Lost Hills, CA -
 United States of America
|
| Phase: | Landing |
| Nature: | Agricultural |
| Departure airport: | (73L) |
| (73L) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
THE PILOT SAID THAT AFTER TOUCHDOWN HE APPLIED SOME LEFT BRAKE PEDAL TO AID IN MAINTAINING DIRECTIONAL CONTROL AS THE AIRCRAFT SLOWED. THE PILOT STATED THAT WHEN HE RELEASED THE BRAKE PRESSURE THE LEFT BRAKE PEDAL REMAINED DEPRESSED WITH THAT BRAKE STILL ACTIVATED. THE PILOT SAID HE WAS ABLE TO MAINTAIN SOME DIRECTIONAL CONTROL BY USING RIGHT BRAKE PRESSURE AND RUDDER; HOWEVER, AS THE AIRCRAFT SLOWED, THE CORRECTIVE ACTIONS BECAME LESS AND LESS EFFECTIVE AND THE AIRCRAFT EVENTUALLY RAN OFF THE LEFT SIDE OF THE RUNWAY AND GROUND LOOPED. THE OPERATOR REPORTED THAT A POST ACCIDENT EXAMINATION REVEALED THAT THE LEFT BRAKE MASTER CYLINDER HAD MALFUNCTIONED AND WOULD BIND WHEN THE PEDAL WAS DEPRESSED.
Probable Cause: THE PILOT'S INABILITY TO MAINTAIN DIRECTIONAL CONTROL DURING THE LANDING ROLL OUT DUE TO A BINDING LEFT BRAKE MASTER CYLINDER.
Accident investigation:
 |
|
Sources:
NTSB LAX93LA098
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 18-Mar-2024 07:05 | ASN Update Bot | Added |
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