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September 30, 1987 · Aero Commander 720 · N4100S
50 Nw San Juan, PR
Overview
Report Status
Preliminary report
Event Type
Accident
Date
September 30, 1987
Injury Outcomes
2 injuries (1 serious injury, 1 minor injury)
Location
50 Nw San Juan, PR
Aircraft
Aero Commander 720
Tail Number
N4100S
Injuries
Serious
Aircraft Damage
Substantial
NTSB Number
MIA87LA266
FIFTEEN MINUTES AFTER A NORTHWEST DEPARTURE FROM SAN JUAN INTERNATIONAL ARPT THE PLT REPORTED THAT THE FLT WAS RETURNING TO LAND AFTER SECURING THE RT ENG DUE TO REPORTED PROBLEMS. UNABLE TO MAINTAIN ALTITUDE THE ACFT WAS DITCHED APRX 50 MILES NORTHWEST OF THE ARPT. DENSITY ALTITUDE WAS COMPUTED TO BE 1900 FT AT THE ARPT 1 MINUTE AFTER THE DITCHING. ACCORDING TO THE ACFT OPERATING MANUAL, AT THE DESIGNED GROSS WEIGHT WITH A PROPERLY SECURED ENGINE AT THE ABOVE COMPUTED DENSITY ALTITUDE, THE SINGLE ENGINE RATE OF CLIMB WOULD BE 212 FEET PER MINUTE. THE ACFT & LOGBOOKS HAVE NOT BEEN RECOVERED THEREFORE THE CAUSE OF THE REPORTED ENG FAILURE & MAINTENANCE INFORMATION COULD NOT BE DETERMINED & OBTAINED RESPECTIVELY.
Full Narrative
FIFTEEN MINUTES AFTER A NORTHWEST DEPARTURE FROM SAN JUAN INTERNATIONAL ARPT THE PLT REPORTED THAT THE FLT WAS RETURNING TO LAND AFTER SECURING THE RT ENG DUE TO REPORTED PROBLEMS. UNABLE TO MAINTAIN ALTITUDE THE ACFT WAS DITCHED APRX 50 MILES NORTHWEST OF THE ARPT. DENSITY ALTITUDE WAS COMPUTED TO BE 1900 FT AT THE ARPT 1 MINUTE AFTER THE DITCHING. ACCORDING TO THE ACFT OPERATING MANUAL, AT THE DESIGNED GROSS WEIGHT WITH A PROPERLY SECURED ENGINE AT THE ABOVE COMPUTED DENSITY ALTITUDE, THE SINGLE ENGINE RATE OF CLIMB WOULD BE 212 FEET PER MINUTE. THE ACFT & LOGBOOKS HAVE NOT BEEN RECOVERED THEREFORE THE CAUSE OF THE REPORTED ENG FAILURE & MAINTENANCE INFORMATION COULD NOT BE DETERMINED & OBTAINED RESPECTIVELY.
Flight
Event TypeAccident
Event Time08:51 AST
Nearest Airport50nm WNW
Runway0
Runway Length0
Runway Width0
Flight Plan FiledVFR
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftAero Commander 720
Tail NumberN4100S
Aircraft CategoryAir
DamageSubstantial
Operating RulePart 91
Engines2
Engine TypeReciprocating
Engine DetailsLycoming · GSO-480-B1A6 · Reciprocating · 340
Seats6
People & Injuries
Injury Summary2 injuries (1 serious injury, 1 minor injury)
Fatal0
Serious1
Minor1
Uninjured0
Total2
Crew 1Age 56 · Second Class
Conditions
ConditionsVMC
LightDaylight
Wind130° @ 9 kt
Visibility15 sm
CeilingNone
Altimeter29.00 inHg
Observation Time12:52
Weather SourceWFAC