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Aviation safety reports, made easier to study

NTSB Reports is an independent research and search tool for public aviation accident and incident records. It brings NTSB aviation reports, structured fields, docket files, extracted figures, photos, videos, and update history into one searchable interface.

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August 27, 1992 · Boeing 737-200 · N206AU

Miami, FL

Overview

Report Status
Probable Cause
Event Type
Accident
Date
August 27, 1992
Injury Outcomes
3 injuries (1 serious injury, 2 minor injuries), 92 uninjured
Location
Miami, FL
Aircraft
Boeing 737-200
Tail Number
N206AU
Operator
Carnival Airlines
Injuries
Serious
NTSB Number
MIA92LA167

WHILE AWAITING TAKEOFF CLEARANCE, THE CAPT STATED THAT HE OBSERVED A FLASH OF LIGHT & SMELLED SMOKE. HE INITIATED THE PAX EVACUATION CHECKLIST & ALL PAX EVACUATED THE ACFT. EXAM OF THE ACFT BY COMPANY MAINT PERSONNEL REVEALED THAT THE NO. 1 GENERATOR CONTROL UNIT (GCU) LOCATED BEHIND THE FIRST OFFICER'S SEAT EXPERIENCED INTERNAL FAILURE. THE GCU WAS REMOVED FOR FURTHER EXAMINATION. EXAM OF THE UNIT REVEALED THAT A DIODE LOCATED INSIDE A TRANSFORMER WAS SHORTED, WHICH OVERHEATED THE TRANSFORMER & PRODUCED THE SMOKE. ACCORDING TO BOEING, THERE HAVE BEEN 12 SIMILAR OCCURRENCES.

NTSB Probable Cause

FAILURE (SHORT) OF A DIODE LOCATED INSIDE A TRANSFORMER WHICH IS LOCATED IN THE NO. 1 GENERATOR CONTROL UNIT.

Full Narrative

WHILE AWAITING TAKEOFF CLEARANCE, THE CAPT STATED THAT HE OBSERVED A FLASH OF LIGHT & SMELLED SMOKE. HE INITIATED THE PAX EVACUATION CHECKLIST & ALL PAX EVACUATED THE ACFT. EXAM OF THE ACFT BY COMPANY MAINT PERSONNEL REVEALED THAT THE NO. 1 GENERATOR CONTROL UNIT (GCU) LOCATED BEHIND THE FIRST OFFICER'S SEAT EXPERIENCED INTERNAL FAILURE. THE GCU WAS REMOVED FOR FURTHER EXAMINATION. EXAM OF THE UNIT REVEALED THAT A DIODE LOCATED INSIDE A TRANSFORMER WAS SHORTED, WHICH OVERHEATED THE TRANSFORMER & PRODUCED THE SMOKE. ACCORDING TO BOEING, THERE HAVE BEEN 12 SIMILAR OCCURRENCES.

Flight

Event TypeAccident
Event Time20:10 EDT
Nearest AirportMiami International (0nm)
Runway0
Flight Plan FiledIFR
Aircraft FireNo
Aircraft ExplosionNo

Aircraft

AircraftBoeing 737-200
Tail NumberN206AU
Aircraft CategoryAir
OperatorCarnival Airlines
Operating RulePart 121
Engines2
Engine TypeTurbojet
Engine DetailsP&W · JT8D-9A · Turbojet · 14000

People & Injuries

Injury Summary3 injuries (1 serious injury, 2 minor injuries), 92 uninjured
Fatal0
Serious1
Minor2
Uninjured92
Total95
Crew 1Age 53 · First Class

Conditions

ConditionsVMC
LightDusk
Wind60° @ 9 kt
Visibility7 sm
CeilingNone
Altimeter30.00 inHg
Observation Time23:50
Weather SourceWFAC

Appendix: Source Data