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NTSB Report
May 25, 1988 · Rockwell A9B · N7787V
Marianna, FL
Overview
Report Status
Preliminary report
Event Type
Accident
Date
May 25, 1988
Injury Outcomes
1 injury (1 serious injury)
Location
Marianna, FL
Aircraft
Rockwell A9B
Tail Number
N7787V
Operator
Panhandle Aviation
Injuries
Serious
Aircraft Damage
Substantial
NTSB Number
MIA88FA178
THE ACFT SUSTAINED A COMPLETE & SUDDEN POWER LOSS WHILE ENGAGED IN AG OPERATIONS AT LOW ALT. THE PROP, FWD PORTION OF THE CRANKSHAFT, CYL HEAD & OTHER ENG PARTS SEPARATED FROM THE ACFT. THE ACFT STRUCK A ROW OF 40 FT TREES & CRASHED TO THE GRND. AN EXAM OF THE FAILED CRANKSHAFT REVEALED THAT IT HAD SEPARATED JUST FWD OF THE NO. 2 MAIN BEARING. LAB ANALYSIS REVEALED EVIDENCE TO SUGGEST THE CRANKSHAFT FAILED DUE TO FATIGUE. THE OWNER OF THE ACFT STATED THE ENG HAD BEEN OVERHAULED IN THE PAST BUT HE DID NOT KNOW WHEN OR BY WHOM. ENG LOGBOOK ENTRIES DID NOT REFLECT ANY ENG OVERHAUL.
Full Narrative
THE ACFT SUSTAINED A COMPLETE & SUDDEN POWER LOSS WHILE ENGAGED IN AG OPERATIONS AT LOW ALT. THE PROP, FWD PORTION OF THE CRANKSHAFT, CYL HEAD & OTHER ENG PARTS SEPARATED FROM THE ACFT. THE ACFT STRUCK A ROW OF 40 FT TREES & CRASHED TO THE GRND. AN EXAM OF THE FAILED CRANKSHAFT REVEALED THAT IT HAD SEPARATED JUST FWD OF THE NO. 2 MAIN BEARING. LAB ANALYSIS REVEALED EVIDENCE TO SUGGEST THE CRANKSHAFT FAILED DUE TO FATIGUE. THE OWNER OF THE ACFT STATED THE ENG HAD BEEN OVERHAULED IN THE PAST BUT HE DID NOT KNOW WHEN OR BY WHOM. ENG LOGBOOK ENTRIES DID NOT REFLECT ANY ENG OVERHAUL.
Flight
Event TypeAccident
Event Time08:10 CDT
Nearest Airport0nm N
Runway0
Runway Length0
Runway Width0
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftRockwell A9B
Tail NumberN7787V
Aircraft CategoryAir
DamageSubstantial
OperatorPanhandle Aviation
Operating RulePart 137
Engines1
Engine TypeReciprocating
Engine DetailsLycoming · IO-540-G1C5 · Reciprocating · 290
Seats1
People & Injuries
Injury Summary1 injury (1 serious injury)
Fatal0
Serious1
Minor0
Uninjured0
Total1
Crew 1Age 46 · Second Class
Conditions
ConditionsVMC
LightDaylight
WindCalm
Visibility7 sm
CeilingBroken clouds 2000 ft
Temperature / Dew Point70 F / 64 F
Altimeter29.00 inHg
Observation Time11:47
Weather SourceWFAC