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July 31, 1987 · Aero Commander Callair A9-B Callair A9 · N7726V
Osgood, MO
Overview
Report Status
Preliminary report
Event Type
Accident
Date
July 31, 1987
Injury Outcomes
No injuries (1 uninjured)
Location
Osgood, MO
Aircraft
Aero Commander Callair A9-B Callair A9
Tail Number
N7726V
Injuries
None
Aircraft Damage
Substantial
NTSB Number
MKC87LA152
DURING AN AERIAL APPLICATION OPERATION, PILOT EXPERIENCED PARTIAL POWER LOSS AND VIBRATION, FOLLOWED BY A LOUD EXPLOSIVE SOUND AND TOTAL LOSS OF POWER. AN EMERGENCY LDG WAS MADE FOLLOWED BY A NOSE OVER. POSTACCIDENT INSPECTION REVEALED THE ENTIRE PROPELLER ASSEMBLY, ONE CYLINDER, AND PART OF THE CRANKSHAFT WERE MISSING. THIS COMPLETE ASSEMBLY WAS FOUND ABOUT THREE MONTHS LATER, APPROXIMATELY ONE QUARTER MILE FROM THE ACCIDENT SCENE. MET LAB REPORT ON PORTION OF CRANKSHAFT THAT REMAINED WITH ACFT INDICATED NO UNUSUAL WEAR OR DAMAGE THAT MIGHT CAUSE ITS FAILURE. THE PIC STATED THAT AFTER THE EXPLOSION, WHICH BLEW THE FRONT HOPPER LOADING LID OFF, THE SPRAY MATERIAL COVERED THE WINDSHIELD MAKING VISIBILITY DIFFICULT.
Full Narrative
DURING AN AERIAL APPLICATION OPERATION, PILOT EXPERIENCED PARTIAL POWER LOSS AND VIBRATION, FOLLOWED BY A LOUD EXPLOSIVE SOUND AND TOTAL LOSS OF POWER. AN EMERGENCY LDG WAS MADE FOLLOWED BY A NOSE OVER. POSTACCIDENT INSPECTION REVEALED THE ENTIRE PROPELLER ASSEMBLY, ONE CYLINDER, AND PART OF THE CRANKSHAFT WERE MISSING. THIS COMPLETE ASSEMBLY WAS FOUND ABOUT THREE MONTHS LATER, APPROXIMATELY ONE QUARTER MILE FROM THE ACCIDENT SCENE. MET LAB REPORT ON PORTION OF CRANKSHAFT THAT REMAINED WITH ACFT INDICATED NO UNUSUAL WEAR OR DAMAGE THAT MIGHT CAUSE ITS FAILURE. THE PIC STATED THAT AFTER THE EXPLOSION, WHICH BLEW THE FRONT HOPPER LOADING LID OFF, THE SPRAY MATERIAL COVERED THE WINDSHIELD MAKING VISIBILITY DIFFICULT.
Flight
Event TypeAccident
Event Time15:45 CDT
Nearest AirportTRENTON (15nm NE)
Runway18
Runway Length4300 ft
Runway Width50 ft
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftAero Commander Callair A9-B Callair A9
Tail NumberN7726V
Aircraft CategoryAir
DamageSubstantial
Operating RulePart 137
Engines1
Engine TypeReciprocating
Engine DetailsLycoming · IO-540-G1C5 · Reciprocating · 290
Seats1
People & Injuries
Injury SummaryNo injuries (1 uninjured)
Fatal0
Serious0
Minor0
Uninjured1
Total1
Crew 1Age 52 · Second Class
Conditions
ConditionsVMC
LightDaylight
WindCalm
Visibility20 sm
CeilingNone
Temperature / Dew Point0 C
Altimeter0
Weather SourcePILO