DCA23LA067

NTSB accident investigation · Airbus A320 · Red Oak, IA · November 20, 2022

Accident · No injuriesClass 4 · LimitedFinal report
Date
November 19, 2022, 20:51 local (Nov 20, 2022, 02:51 UTC)
Place
Red Oak, IA · from 6120
Injuries
153 uninjured
Damage
Substantial damage
Phase of flight
Enroute
Aircraft
N330NWAirbus A320
Defining event
Enroute-descent: Birdstrike
Weather
Visual (VMC) · Night
Status
Completed
Report
Approved by Office Director
Investigation class
Class 4 - Basic report with no Prelim publish
NTSB office
Major Investigations Division
Parties
FAA/AVP100
Case key
106329

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

On this page

Probable cause

Multiple bird strikes during descent.

Findings · 3

NTSB’s coded findings. Those marked are part of the probable cause; the rest are factors or other findings. Under each, the cases with the same finding.

Object/animal/substance: animal(s)/bird(s)Environmental issues › Physical environment · Effect on equipmentAirbus Industrie A320-211: 2 casesAll aircraft: 358 casesProbable cause
Object/animal/substance: animal(s)/bird(s)Environmental issues › Physical environment · Availability of related infoAirbus Industrie A320-211: 2 casesAll aircraft: 358 cases
Object/animal/substance: animal(s)/bird(s)Environmental issues › Physical environment · Ability to respond/compensateAirbus Industrie A320-211: 2 casesAll aircraft: 358 cases

Sequence of events

The events NTSB coded, in order, by phase of flight. The defining event is the one that best describes the accident. Under each, the cases with the same event anywhere in their sequence.

Analysis

Delta Air Lines flight 2295 struck several birds while descending through 13,000 feet on approach to Eppley Airfield (OMA), Omaha, Nebraska. The bird strike occurred about 34 miles southeast of the airport, near Red Oak, Iowa, at an airspeed of 290 knots. The crew continued the approach and made a normal landing. Weather at the time of the event was night visual conditions. Birds struck the airplane and punctured the fuselage skin in two locations on the left side; one above the cockpit windows and another near the pitot tube (see figure 1). Another bird punctured the skin on the right side of the fuselage below the cockpit window. Damage was evident to the stringers and frames at each location, and the size of the punctures in total exceeded the size of the outflow valve. The damage adversely affected the structural strength and pressurization performance and required a major repair. Figure 1. Photo of two of the bird strikes on the left side of the airplane, indicated by blue circles. (Source: Delta Air Lines) The flight crew described the noise as the strike occurred as being like an “explosion.” The cabin depressurized, and the cockpit door blew open. The captain reported that the wind noise was “extreme” which made communication difficult. Soon after the strike the airplane descended though 10,000 ft and the cabin altitude matched the airplane altitude at about 9,500 ft. The crew declared an emergency, continued the approach to OMA, and landed uneventfully. The species of birds was identified as either Snow Goose or Ross’s Goose (DNA testing could not discriminate between the two) by the Smithsonian Institution Feather Identification Laboratory. According to the FAA, there were no pilot reports of bird activity in the area near the time of the accident.

Aircraft

Registration
N330NW
Reported as
Airbus A320 (211)
Category
Airplane
Serial number
307
Built
1992
Airframe hours
84,273
Engines
CFM Intl. CFM56 SERIES, turbo fanCFM Intl. CFM56 SERIES, turbo fan
Damage
Substantial damage
Flight
Part 121
Operator
Delta Air Lines Inc
Registered owner
Delta Air Lines Inc
Airworthiness certificate
Standard, Transport
Last inspection
Continuous airworthiness · November 17, 2022
Departed
ATL · Atlanta, GA
Destination
OMA · Omaha, NE
Flight plan
IFR
Equipment
Angle of attack indicator, ADS-B, Stall warning system, Onboard weather, Electronic primary flight display, Electronic multifunction display, Electronic flight bag or handheld device, Data recorder, Auto-pilot

Matched to the registry by N-number and the event date; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.

Flight crew · 2

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
60
Injuries
None
Certificate
Airline transport
Airplane ratings
Multi-engine land, Single-engine land
Instrument ratings
Airplane
Medical
Class 1, Unknown
Last flight review
April 10, 2022
Seat
Left
Flight hours
16,335 total · 1,779 in this make and model · 172 in the last 90 days · 3 in the last 24 hours
Role
Co-pilot
Age
37
Injuries
None
Certificate
Airline transport
Airplane ratings
Multi-engine land, Single-engine land
Instrument ratings
Airplane
Medical
Class 1, Unknown
Last flight review
May 2, 2022
Seat
Right
Flight hours
660 total · 316 in this make and model · 163 in the last 90 days · 3 in the last 24 hours

Weather

Conditions
Visual (VMC) · Night
Wind
170° at 3 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
19 °F, dew point 9 °F
Altimeter
30.37 inHg
Observed at
KOMA, 34 nm away
METAR
METAR KOMA 200252Z 17003KT 10SM CLR M07/M13 A3037 RMK AO2 SLP298 T10721133 50000=

Docket · 4

The files NTSB released with the investigation on October 16, 2023, on NTSB’s docket system: statements, records, photos and specialists’ reports. 3.7 MB in all.