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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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July 26, 1988 · Boeing 737-300 · N14336

Kenton, DE

Overview

Report Status
Preliminary report
Event Type
Incident
Date
July 26, 1988
Injury Outcomes
No injuries (50 uninjured)
Location
Kenton, DE
Aircraft
Boeing 737-300
Tail Number
N14336
Injuries
None
Aircraft Damage
Minor
NTSB Number
FTW88IA141

A FLAMEOUT OF THE #1 ENGINE OCCURRED DUE TO WATER INGESTION WHEN THE AIRCRAFT PENETRATED A VIP LEVEL 5 THUNDERSTORM AND ENCOUNTERED HEAVY RAIN WHILE DESCENDING WITH THE THROTTLES A FLIGHT IDLE. THE ENGINE SUFFERED OVERTEMPERATURE DAMAGE TO THE TURBINE SECTION DURING THE SUBSEQUENT WINDMILLING START. THE CAPTAIN ELECTED TO DESCEND IN PRECIPITATION WITH THE ENGINES AT IDLE, DESPITE THE COPILOT'S WARNING THAT IDLE DESCENT WAS CONTRARY TO RECENTLY PUBLISHED PROCEDURES WHICH REQUIRED MAINTAINING A MINIMUM OF 45% N1 RPM. THE PRECIPITATION INDUCED FLAMEOUT PHENOMENA HAD BEEN IDENTIFIED IN PREVIOUS INCIDENTS, AND CORRECTIVE PROCEDURES WERE ISSUED BY THE FAA, THE MANUFACTURERS, AND THE CARRIER, PRIOR TO THIS OCCURRENCE.

Full Narrative

A FLAMEOUT OF THE #1 ENGINE OCCURRED DUE TO WATER INGESTION WHEN THE AIRCRAFT PENETRATED A VIP LEVEL 5 THUNDERSTORM AND ENCOUNTERED HEAVY RAIN WHILE DESCENDING WITH THE THROTTLES A FLIGHT IDLE. THE ENGINE SUFFERED OVERTEMPERATURE DAMAGE TO THE TURBINE SECTION DURING THE SUBSEQUENT WINDMILLING START. THE CAPTAIN ELECTED TO DESCEND IN PRECIPITATION WITH THE ENGINES AT IDLE, DESPITE THE COPILOT'S WARNING THAT IDLE DESCENT WAS CONTRARY TO RECENTLY PUBLISHED PROCEDURES WHICH REQUIRED MAINTAINING A MINIMUM OF 45% N1 RPM. THE PRECIPITATION INDUCED FLAMEOUT PHENOMENA HAD BEEN IDENTIFIED IN PREVIOUS INCIDENTS, AND CORRECTIVE PROCEDURES WERE ISSUED BY THE FAA, THE MANUFACTURERS, AND THE CARRIER, PRIOR TO THIS OCCURRENCE.

Flight

Event TypeIncident
Event Time19:08 EDT
Nearest Airport30nm N
Runway0
Flight Plan FiledIFR
Aircraft FireNo
Aircraft ExplosionNo

Aircraft

AircraftBoeing 737-300
Tail NumberN14336
Aircraft CategoryAir
DamageMinor
Operating RulePart 121
Engines2
Engine TypeTurbofan
Engine DetailsGe · CFM-56-3 · Turbofan · 20000
Seats125

People & Injuries

Injury SummaryNo injuries (50 uninjured)
Fatal0
Serious0
Minor0
Uninjured50
Total50
Crew 1Age 39 · First Class

Conditions

ConditionsIMC
LightDaylight
WindCalm
CeilingNone
Temperature / Dew Point0 C / 0 C
Altimeter29.00 inHg
Weather SourcePILO

Appendix: Source Data