NTSB Identification: SEA83FA045.
The docket is stored on NTSB microfiche number 20292.
Accident occurred Sunday, January 23, 1983 in ATHOL, ID
Aircraft: CROMWELL/PITTS S-1S, registration: N56T
Injuries: 1 Fatal.

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.

THE PLT TOOKOFF WITH AN ESTIMATED 7 GAL OF FUEL ON BOARD. WHILE PERFORMING AEROBATIC MANEUVER, HE ENTERED A VERTICAL, CLIMBING, POWER-ON MANEUVER. WITNESSES REPORTED THAT THE ACFT CLIMBED TO ZERO AIRSPEED AT ABOUT 2500 FT AGL. REPORTEDLY, THE ACFT THEN SLID BACKWARD AND ENTERED AN INVERTED FLAT SPIN. POWER REMAINED ON FOR ABOUT HALF OF THE DESCENT. WHEN THE POWER WAS REDUCED, THE ACFT ENTERED AN UPRIGHT SPIN AND CONTINUED TO DESCEND IN THIS MODE UNTIL GROUND IMPACT. INTERVIEWS WITH OTHER PLTS, FAMILIAR WITH THE FLT CHARACTERISTICS OF THE PITTS, REVEALED THAT AT A LOW STATE OF FUEL, THE CENTER-OF-GRAVITY IS IN THE AFT RANGE. THEY REPORTED A POWER REDUCTION IS NECESSARY TO RECOVER FROM AN INVERTED SPIN. THEY ALSO STATED THAT INTENTIONAL SPINS WERE NOT A NORMAL PART OF THIS PLT'S AEROBATIC ROUTINE. NO MALFUNCTION OF THE ACFT OR PLT IMPAIRMENT WAS FOUND DURING THE INVESTIGATION.

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

STALL/SPIN..NOT CORRECTED..PILOT IN COMMAND

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

EMERGENCY PROCEDURE..IMPROPER..PILOT IN COMMAND

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

THROTTLE/POWER CONTROL..IMPROPER USE OF..PILOT IN COMMAND


Contributing Factors

AEROBATICS..PERFORMED..PILOT IN COMMAND


Contributing Factors

STALL/SPIN..INADVERTENT..PILOT IN COMMAND


Contributing Factors

LACK OF TOTAL EXPERIENCE IN TYPE OF AIRCRAFT..PILOT IN COMMAND

Index for Jan1983 | Index of months