- Date
- November 10, 2011, 11:45 local (17:45 UTC)
- Place
- Minneapolis, MN
- Injuries
- 150 uninjured
- Damage
- Substantial damage
- Phase of flight
- Initial climb
- Aircraft
- N331NWAirbus Industrie A320 211
- Defining event
- Initial climb: Birdstrike
- Weather
- Day
- Status
- Completed · report September 5, 2018
- Report
- Approved by Office Director
- NTSB office
- Major Investigations Division
- Case key
- 82961
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
In-flight collision with birds during initial climb, which resulted in substantial damage to the aircraft.
Findings · 1
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.
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
On November 10, 2011, at about 1157 central standard time, Delta flight 1691, an A320-211, N331NW, experienced a bird strike during initial climb after departure from Minneapolis-St. Paul International Airport (KMSP), Minneapolis, Minnesota. There were no injuries to the 150 passengers and crewmembers onboard and the airplane was substantially damaged. The flight was operating as a 14 Code of Federal Regulations Part 121 regularly scheduled passenger flight from KMSP to Reno–Tahoe International Airport (KRNO), Reno, Nevada. According to the flight crew, a flock of "50-100" large white birds, possibly geese, appeared in front of the airplane during initial climb. The first officer, who was the pilot flying, increased the rate of climb to attempt to avoid the flock, but at least one bird made impacted the aircraft. After striking the bird, the flight crew received an Electronic Centralized Aircraft Monitor message for loss of cabin pressure and the right side airspeed indication became erratic. The flight crew declared an emergency and made an uneventful landing back at KMSP. Examination of the aircraft after landing revealed substantial damage to the forward pressure bulkhead and minor damage to the right engine.
Factual narrative
On November 10, 2011, at about 1157 central standard time, Delta flight 1691, an A320-211, N331NW, experienced a bird strike during initial climb after departure from Minneapolis-St. Paul International Airport (KMSP), Minneapolis, Minnesota. There were no injuries to the 150 passengers and crewmembers onboard and the airplane was substantially damaged. The flight was operating as a 14 Code of Federal Regulations Part 121 regularly scheduled passenger flight from KMSP to Reno–Tahoe International Airport (KRNO), Reno, Nevada. According to the flight crew, a flock of "50-100" large white birds, possibly geese, appeared in front of the airplane during initial climb. The first officer, who was the pilot flying, increased the rate of climb to attempt to avoid the flock, but at least one bird made impacted the aircraft. After striking the bird, the flight crew received an Electronic Centralized Aircraft Monitor message for loss of cabin pressure and the right side airspeed indication became erratic. The flight crew declared an emergency and made an uneventful landing back at KMSP. Examination of the aircraft after landing revealed substantial damage to the forward pressure bulkhead and minor damage to the right engine. Photo of bird strike to radome Photo of Bird strike damage to right engine Photo of bird strike damage to E and E bay Photo of bird recovered from E and E bay
Aircraft
- Registration
- N331NW
- Reported as
- Airbus Industrie A320 211 (211)
- Category
- Airplane
- Serial number
- 318
- Built
- 1992
- Airframe hours
- 59,784
- Engines
- CFM Intl. CFM-56-5A1, 25,000 lbs thrust, turbo fanCFM Intl. CFM-56-5A1/F, 25,000 lbs thrust, 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
- AAIP · October 22, 2011
- Departed
- KMSP · Minneapolis, MN
- Destination
- RNO · Reno, NV
- Flight plan
- IFR
- Airport
- KMSP · Minneapolis-St Paul Intl/Wold-, runway 30R, 8,200 × 150 ft, concrete
- Equipment
- Unknown
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 · 5
As NTSB recorded them. NTSB leaves out names.
- Role
- Pilot
- Age
- 51
- Injuries
- None
- Certificate
- Airline transport
- Airplane ratings
- Multi-engine land
- Instrument ratings
- Airplane
- Medical
- Class 1, Unknown
- Last flight review
- June 29, 2011
- Seat
- Left
- Restraint
- 5-point
- Flight hours
- 13,191 total · 6,307 in this make and model · 154 in the last 90 days · 1 in the last 24 hours
- Role
- Co-pilot
- Age
- 49
- Injuries
- None
- Certificate
- Airline transport
- Airplane ratings
- Single-engine land, Multi-engine land
- Instrument ratings
- Airplane
- Medical
- Class 1, Unknown
- Last flight review
- April 28, 2011
- Seat
- Right
- Restraint
- 5-point
- Flight hours
- 8,154 total · 5,553 in this make and model · 128 in the last 90 days · 1 in the last 24 hours
- Role
- Cabin crew
- Injuries
- None
- Seat
- Rear
- Role
- Cabin crew
- Injuries
- None
- Seat
- Rear
- Role
- Cabin crew
- Injuries
- None
- Seat
- Rear
Weather
- Conditions
- Day
- Wind
- 300° at 11 knots, gusting 24
- Visibility
- 10 statute miles
- Lowest ceiling
- 5,000 ft overcast
- Temperature
- 37 °F, dew point 25 °F
- Altimeter
- 30.04 inHg
- Turbulence
- Unknown
- Observed at
- KMSP
Docket · 9
The files NTSB released with the investigation on August 14, 2018, on NTSB’s docket system: statements, records, photos and specialists’ reports. 3.8 MB in all.
Other investigations on N331NW · 3
Matched to the same aircraft by N-number and date.