FTW88IA109

NTSB incident investigation · Boeing 737-3T0 · New Orleans, LA · May 24, 1988

Incident · No injuriesIncident investigationFinal report
Date
May 24, 1988, 12:55 local (17:55 UTC)
Place
New Orleans, LA
Injuries
45 uninjured
Damage
Minor damage
Phase of flight
Enroute
Aircraft
N75356Boeing 737-3T0
Weather
Visual (VMC) · Day
Status
Completed · report March 25, 1991
Report
Approved by Office Director
FAA report
19880524032219I
Case key
22574

From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the incident.

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Probable cause

A double engine flameout due to water ingestion which occurred as a result of an inflight encounter with an area of very heavy rain and hail. A contributing cause of the incident was the inadequate design of the engines and the FAA water ingestion certification standards which did not reflect the waterfall rates that can be expected in moderate or higher intensity thunderstorms.

Sequence of events

NTSB’s coding before 2008: each occurrence and phase of flight, and the causes and factors under it. The codes are defined in NTSB’s coding manual.

In flight encounter with weatherDescent - normal
Flight into known adverse weather - continuedPilot in commandFactor
Weather condition - thunderstormFactor
Weather condition - rainFactor
Weather condition - hailFactor
Weather condition - turbulenceFactor
Loss of engine power(total) - nonmechanicalDescent - normal
All engines
Miscellaneous - waterCause
Powerplant - inoperativeCause
Acft/equip,inadequate designManufacturerFactor
Inadequate certification/approval,aircraftFaa(organization)Factor
Forced landingDescent - emergency
Starting procedure - attempted
Powerplant - overtemperature
Emergency procedure - performed

Analysis

Drg dscnt fm FL 350 for IFR arr to New Orleans, flt crew noted green & yellow rtrns on wx radar with some isolated red cells, left & rgt of intended flt path. Bfr entering clouds at 30,000', capt slctd continuous eng ignition & activated eng anti-ice sys. Crew slctd route bet 2 cells, displayed as red on wx radar. Hvy rain, hail & turbc were enctrd. At ABT16,500', both engs flamed out. APU was started & ac elec pwr was restored while dscndg thru abt 10,600'. Atmts to wind- mill restart were unsuccessful. Both engs lit-off by using starters, but neither would accelerate to idle; advng thrust levers increased EGT byd limits. Engs were shut down to avoid catastrophic failure. Emerg lndg was made on levee w/o further dmg to acft. Inv revealed acft enctrd lvl 4 tstm, but engs flamed out, though they had met FAA specs for water ingestion. Acft had minor hail dmg; #2 eng was dmgd fm overtemp. After incident, omb 88-5 & AD 6-14-88 issued to rqr minrpm of 45% & to restr use of autothrust in mod/hvy precip; eng mod was provided for increased cpty of wtr ingestion.

Aircraft

Registration
N75356
Reported as
Boeing 737-3T0
Category
Airplane
Serial number
23838
Airframe hours
81
Engine
GE CFM56-3B1, 20,000 lbs thrust, turbo fan
Damage
Minor damage
Flight
Part 129
Operator
Taca International Airlines
Registered owner
Polaris Aircraft Leasing Corp.
Airworthiness certificate
Standard, Transport
Last inspection
Continuous airworthiness · May 20, 1988 · 10 hours before
Departed
BZE · Belize City, OF
Destination
MSY
Flight plan
IFR

Flight crew

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
29
Certificates
Foreign, Airline transport
Airplane ratings
Multi-engine land, Single-engine land
Instrument ratings
Airplane
Medical
Class 1, Valid Medical--w/ waivers/lim
Seat
Left
Flight hours
13,410 total · 4,011 in this make and model · 10,900 as pilot in command · 240 in the last 90 days · 85 in the last 30 days · 6 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
170° at 10 knots
Visibility
8 statute miles
Lowest ceiling
4,500 ft broken
Temperature
77 °F, dew point 72 °F
Altimeter
29.00 inHg
Observed at
NEW, 5 nm away

FAA reports on this event · 1

The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.