Aircraft Accident/Incident Report

Phoenix, Arizona 85034
Monday, November 2, 2009 8:50 MST

NTSB Narrative Summary Released at Completion of Accident

The flight crew reported that during climb to cruise they heard a loud bang, followed by a "pop" in the pressurization and loud noise within the cockpit. The first officer stated that prior to the loud bang he observed "several black dots" directly in front of him. The flight crew declared an emergency and diverted to their departure airport, where they landed uneventfully. Examination of the airplane by a Federal Aviation Administration inspector revealed an approximately 18 inch by 21 inch tear in fuselage skin located aft of the right side flight deck eyebrow window and structural damage to the upper portion of the fuselage. Bird residue and feathers were observed near the torn area of fuselage skin. The Smithsonian National Museum of Natural History Feather Identification Laboratory performed DNA analysis, microscopic examination, and whole feather comparisons with museum study skins on the recovered residue and feathers. The analysis identified the residue and feathers as the remains of a Western Grebe (Aechmophorus occidentalis). The weight range for the species complex is recorded from 906 to 1,429 grams, with an average weight of 3.3 pounds.

NTSB Probable Cause Narrative

An in-flight collision with birds.

Event Information

Type of Event Accident
Event Date 11/2/2009
Event Day of the Week Monday
Time of Event 850
Event Time Zone Mountain Standard Time
Event City Phoenix
Event State ARIZONA
Event Country --
Zipcode of the event site 85034
Event Date Year 2009
Event Date Month 11
MidAir Collision Indicator No
On Ground Collision occurred ? No
Event Location Latitude 332603N
Event Location Longitude 1120041W
Event Location Airport --
Event Location Nearest Airport ID --
Indicates whether the acc/inc occurred off or on an airport Off Airport/Airstrip
Distance from airport in statute miles --
Degrees magnetic from airport --
Airport Elevation --
Weather Briefing Completeness --
Investigator's weather source Weather Observation Facility
Time of the weather observation 851 Mountain Standard Time
Direction of event from weather observation facility (degrees) 30
Weather Observation Facility ID PHX
Elevation of weather observation facility 1135
Distance of event from weather observation facility (units?) 23
Time Zone of the weather observation MST
Lighting Conditions Day
Lowest Ceiling Height --
Lowest Non-Ceiling Height --
Sky/Lowest/Cloud Conditions Clear
Sky Condition for Lowest Ceiling None
Visibility Runway Visual Range (Feet) --
Visibility Runway Visual Value (Statute Miles) --
Visibility (Statute Miles) 10
Air Temperature at event time (in degrees celsius) 19
Dew Point at event time (in degress fahrenheit) -1
Wind Direction (degrees magnetic) 90
Variable Wind Indicator Wind direction could be determined
Wind Speed (knots) 3
Wind Velocity Indicator --
Wind Gust Indicator Not Gusting
Wind Gust (knots) --
Altimeter Setting at event time (in. Hg) 30.11
Density Altitude (feet) --
Intensity of Precipitation --
METAR weather report --
Event Highest Injury None
On Ground, Fatal Injuries --
On Ground, Minor Injuries --
On Ground, Serious Injuries --
Injury Total Fatal --
Injury Total Minor --
Injury Total None 70
Injury Total Serious --
Injury Total All --
Investigating Agency NTSB
NTSB Docket Number (internal use) 26431
NTSB Notification Source Delta Airlines Inc.
NTSB Notification Date --
NTSB Notification Time --
Fiche Number and/or location -used to find docket information --
Date of most recent change to record Dec 11 2009 7:51PM
User who most recently changed record stam
Basic weather conditions Visual Meteorological Cond
FAA District Office --

Aircraft Involved

Aircraft #1

Aircraft Registration Number N909DA
NTSB Number WPR10LA044
Missing Aircraft Indicator --
Federal Aviation Reg. Part Part 121: Air Carrier
Type of Flight Plan filed IFR
Flight plan Was Activated? Yes
Damage Substantial
Aircraft Fire None
Aircraft Explosion None
Aircraft Manufacturer's Full Name MCDONNELL DOUGLAS
Aircraft Model MD-90-30
Aircraft Series Identifier --
Aircraft Serial Number 53389
Certified Max Gross Weight 161000
Aircraft Category Airplane
Aircraft Registration Class --
Aircraft is a homebuilt? No
Flight Crew Seats 3
Cabin Crew Seats 5
Passenger Seats 150
Total number of seats on the aircraft 158
Number of Engines 2
Fixed gear or retractable gear Retractable
Aircraft, Type of Last Inspection Continuous Airworthiness
Date of Last Inspection Oct 31 2009 12:00AM
Airframe hours since last inspection --
Airframe Hours 38842
ELT Installed Yes
ELT Activated No
ELT Aided Location of Event Site No
ELT Type Unknown
Aircraft Owner Name DELTA AIR LINES INC
Aircraft Owner Street Address 1775 AVIATION BLVD DEPT 595
Aircraft Owner City ATLANTA
Aircraft Owner State GA
Aircraft Owner Country USA
Aircraft Owner Zipcode 30320
Operator is an individual? No
Operator Name DELTA AIR LINES INC
Operator Same as Owner? Yes
Operator Is Doing Business As --
Operator Address Same as Owner? Yes
Operator Street Address 1775 AVIATION BLVD DEPT 595
Operator City ATLANTA
Operator State GA
Operator Country USA
Operator Zip code 30320
Operator Code DALA
Owner has at least one certificate Yes - certificate holder
Other Operator of large aircraft? No
Certified for Part 133 or 137 Operation --
Operator Certificate Number --
Indicates whether an air carrier operation was scheduled or not Scheduled
Indicates Domestic or International Flight Domestic
Operator carrying Pax/Cargo/Mail Passenger Only
Type of Flying (Per_Bus / Primary) --
Second Pilot on Board Yes
Departure Point Same as Event No
Departure Airport Code PHX
Departure City Phoenix
Departure State AZ
Departure Country USA
Departure Time 841
Departure Time Zone MST
Destination Same as Local Flt --
Destination Airport Code SLC
Destination City Salt Lake City
Destination State UT
Destination Country USA
Specific Phase of Flight --
Report sent to ICAO? --
Evacuation occurred --
Date of most recent change to record Dec 11 2009 7:51PM
User who most recently changed record stam
Since inspection or accident Time of Accident
Event Location Runway Number and Location N/A
Runway Length --
Runway Width --
Sight Seeing flight No
Air Medical Flight No
Medical Flight --