What happened
The aircraft departed a private grass strip with the specific mission of dispensing liquid chemicals onto a nearby cotton field. Following the completion of the spraying operation, the pilot attempted to return to the airfield for landing. Upon final approach and touchdown, the pilot experienced a sudden loss of function in the right main brake system.
The investigation
Post-incident examination revealed that the hydraulic fluid had drained off during the flight. This loss of pressure was attributed to an undetected leak within the hydraulic line. The pilot stated that the brakes had been properly serviced with fluid prior to the last takeoff, indicating the leak developed or became apparent only after departure.
Findings
The primary contributing factor was the loss of right main brake capability during the landing phase. This failure was directly caused by hydraulic fluid leakage from an undetected fault in the hydraulic line, which resulted in insufficient pressure to operate the braking system effectively on that side.