What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
On 9-16-09, the aircraft was flown for a maintenance test flight after maintenance on several items. The RH gear, outboard wheel half had been replaced. The brake cylinders had been rebuilt with new gaskets, and new brake pads. Repaired systems were ground tested and maintenance documented before the test flight. The aircraft was test flown by the pilot with the associated mechanic on board. The aircraft landed on runway 7, and during braking on rollout, the brake on the right side failed, the pedal to the floor. Loss of aircraft braking control (RH) resulted in a veering off the runway to the side grassy area and an aircraft 270 degree ground loop. The aircraft damaged the right wingtip area, the right wing pontoon and supporting struts, and the right wing aileron. Inspection of the failed right side brake system revealed a failed, broken brake hose attach fitting, an to pipe, 1/4 inch, an 823-4D, failed approx. 1 thread below the brake cylinder outer surface.
As the FAA filed it
ON 9-16-09, THE AIRCRAFT WAS FLOWN FOR A MAINTENANCE TEST FLIGHT AFTER MAINTENANCE ON SEVERAL ITEMS. THE RH GEAR, OUTBOARD WHEEL HALF HAD BEEN REPLACED. THE BRAKE CYLINDERS HAD BEEN REBUILT WITH NEW GASKETS, AND NEW BRAKE PADS. REPAIRED SYSTEMS WERE GROUND TESTED AND MAINTENANCE DOCUMENTED BEFORE THE TEST FLIGHT. THE AIRCRAFT WAS TEST FLOWN BY THE PILOT WITH THE ASSOCIATED MECHANIC ON BOARD. THE AIRCRAFT LANDED ON RUNWAY 7, AND DURING BRAKING ON ROLLOUT, THE BRAKE ON THE RIGHT SIDE FAILED, THE PEDAL TO THE FLOOR. LOSS OF AIRCRAFT BRAKING CONTROL (RH) RESULTED IN A VEERING OFF THE RUNWAY TO THE SIDE GRASSY AREA AND AN AIRCRAFT 270 DEGREE GROUND LOOP. THE AIRCRAFT DAMAGED THE RIGHT WINGTIP AREA, THE RIGHT WING PONTOON AND SUPPORTING STRUTS, AND THE RIGHT WING AILERON. INSPECTION OF THE FAILED RIGHT SIDE BRAKE SYSTEM REVEALED A FAILED, BROKEN BRAKE HOSE ATTACH FITTING, AN TO PIPE, 1/4 INCH, AN 823-4D, FAILED APPROX. 1 THREAD BELOW THE BRAKE CYLINDER OUTER SURFACE.
NTSB investigation
The NTSB’s investigation of this event, with its probable cause and findings. Matched to this report by N-number and date.
Other reports on N86627 · 1
Matched to the same aircraft by N-number and date.