NTSB Identification: SEA89FA122.
The docket is stored on NTSB microfiche number 40826.
Accident occurred Monday, June 26, 1989 in PETERSBURG, AK
Probable Cause Approval Date: 01/23/1992
Aircraft: DOUGLAS DC-3C, registration: N8042X
Injuries: 2 Uninjured.

NTSB investigators either traveled in support of this investigation or conducted a significant amount of investigative work without any travel, and used data obtained from various sources to prepare this aircraft accident report.

IMMEDIATELY AFTER TKOF AT 200-300 FT AGL, A PORTION OF FABRIC SEPD FROM THE R AILERON. WHILE MANEUVERING THE ACFT THE PLT'S CONTROL WHEEL BECAME FREE, AND HE ELECTED TO DITCH USING FULL RUDDER & DIFFERENTIAL POWER. EXAM OF THE PLT'S CONTROL WHEEL AILERON CONTROL CHAIN REVEALED THAT THE CHAIN FAILED DUE TO OVERLOAD. THE RIGHT SEAT WAS OCCUPIED BY A MECHANIC EMPLOYED BY THE OPERATOR AND HELD A PRIVATE PLT CERT WITH SINGLE & MULTIENGINE RATING. HE STATED THAT HE SUGGESTED TO THE PLT THAT HIS CONTROLS WERE FUNCTIONING NORMALLY, BUT THE PLT DISAGREED & PROCEEDED TO DITCH THE ACFT. EXAM OF THE RIGHT CONTROL YOKE REVEALED AILERON MOVEMENT IN THE CORRECT DIRECTION.

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

THE PILOT'S IMPROPER DECISION TO DITCH THE AIRCRAFT WHEN IT COULD HAVE BEEN FLOWN BACK TO THE AIRPORT USING THE RIGHT SEAT CONTROLS. CONTRIBUTING FACTOR(S) WAS: THE FAILURE & SEPARATION OF A PORTION OF THE RIGHT AILERON FABRIC, AND THE PILOT'S EXCESSIVE FORCE APPLIED TO THE CONTROL WHEEL WHICH RESULTED IN OVERSTRESSING THE AILERON CONTROL CHAIN.

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