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NTSB Report
June 16, 1991 · Boeing 747-400 · PHBFG
Philadelphia, PA
Overview
Report Status
Probable Cause
Event Type
Accident
Date
June 16, 1991
Injury Outcomes
6 injuries (1 serious injury, 5 minor injuries), 272 uninjured
Location
Philadelphia, PA
Aircraft
Boeing 747-400
Tail Number
PHBFG
Operator
Klm Royal Dutch Airline
Injuries
Serious
NTSB Number
BFO91LA055
THE FLIGHT WAS ON A CRUISE DESCENT AT 20,000 FEET MSL WHEN IT ENCOUNTERED TURBULENCE, CAUSING INJURIES TO CABIN CREWMEMBERS INCLUDING ONE WHO WAS SERIOUSLY INJURED. THE PILOT REPORTED THAT HE WAS DEVIATING AROUND CUMULONIMBUS CLOUDS WHEN HE INADVERTENTLY ENTERED ONE. HE SAID THE SEAT BELT SIGN WAS ON AT THE TIME. THE FLIGHT PROCEEDED TO THE DESTINATION AND LANDED WITHOUT FURTHER INCIDENT.
NTSB Probable Cause
FAILURE OF THE PILOT TO ENSURE CABIN CREW MEMBERS WERE PREPARED FOR AN ENCOUNTER WITH TURBULENCE.
Full Narrative
THE FLIGHT WAS ON A CRUISE DESCENT AT 20,000 FEET MSL WHEN IT ENCOUNTERED TURBULENCE, CAUSING INJURIES TO CABIN CREWMEMBERS INCLUDING ONE WHO WAS SERIOUSLY INJURED. THE PILOT REPORTED THAT HE WAS DEVIATING AROUND CUMULONIMBUS CLOUDS WHEN HE INADVERTENTLY ENTERED ONE. HE SAID THE SEAT BELT SIGN WAS ON AT THE TIME. THE FLIGHT PROCEEDED TO THE DESTINATION AND LANDED WITHOUT FURTHER INCIDENT.
Flight
Event TypeAccident
Event Time15:00 EDT
Nearest Airport0nm N
Runway0
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftBoeing 747-400
Tail NumberPHBFG
Aircraft CategoryAir
OperatorKlm Royal Dutch Airline
Operating RulePart 129
Engines4
Engine TypeTurbofan
Engine DetailsTurbofan
People & Injuries
Injury Summary6 injuries (1 serious injury, 5 minor injuries), 272 uninjured
Fatal0
Serious1
Minor5
Uninjured272
Total278
Crew 1Age 54 · First Class
Conditions
ConditionsVMC
LightDaylight
Wind200° @ 3 kt
Visibility8 sm
CeilingBroken clouds 7000 ft
Altimeter29.00 inHg
Observation Time19:00
Weather SourceWFAC