NTSB Identification: BFO89LA013.
The docket is stored on NTSB microfiche number 39992.
Accident occurred Wednesday, November 30, 1988 in WASHINGTON, DC
Probable Cause Approval Date: 01/16/1990
Aircraft: SWEARINGEN SA-226T, registration: N263CM
Injuries: 1 Uninjured.

NTSB investigators may not have traveled in support of this investigation and used data provided by various sources to prepare this aircraft accident report.

THE PLT RPRTD HE WAS FLYING AN AUTOPILOT COUPLED ILS APCH WHEN THE YAW DAMPER & AUTOPILOT DISENGAGED. AFTER SOME DIFFICULTY, THE PLT WAS ABLE TO KEEP THE AUTOPILOT ENGAGED. HE SAID HE DISENGAGED THE AUTOPILOT ON FINAL APCH AT AN ALT OF APRX 250' AGL. HE LOWERED FULL FLAPS & SLOWED THE ACFT TO 107 KTS. THE PLT STATED THAT AFTER THE ACFT TOUCHED DOWN & TRAVELED APRX 1000', ITS NOSE BEGAN TO RISE & OSCILLATE. HE ABORTED THE LNDG, BUT HE WAS UNABLE TO GET AN UP & LOCKED INDICATION FOR THE NOSE GEAR, ALTHOUGH IT WOULD LOCK DOWN. AFTER MAKING A FLY-BY TO VERIFY THE GEAR POSITION, HE MADE A 'SLOW' LNDG. THE PLT RPRTD THAT ALTHOUGH A SLIGHT OSCILLATION WAS NOTED DRG THE LNDG, HE FORCEFULLY HELD THE NOSE DOWN AS HE SLOWED THE ACFT. TESTING & EVALUATION OF THE AUTOPILOT SYSTEM FAILED TO DISCLOSE ANY DISCREPANCY WHICH WOULD HAVE RESULTED IN THE OSCILLATIONS.

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

PILOTS FAILURE TO MAINTAIN CONTROL OF THE AIRPLANE DURING A TOUCH AND GO LANDING.

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