# NTSB DCA10WA100: Boeing 737, Milan, Italy, July 23, 2010

- Type: NTSB incident investigation
- Classification: Incident · No injuries · Foreign investigation
- Date: July 23, 2010, 07:20 local (07:20 UTC)
- Place: Milan, Italy
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Defining event: [Enroute: Pressure/environ sys malf/fail](https://openairdocs.org/ntsb-events/331)
- Highest injury: No injuries
- Injuries: 6 uninjured
- Status: Led by another country's authority
- NTSB office: Major Investigations Division
- Lead agency: Other
- Parties: Boeing
- NTSB case key (mKey): 77436
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DCA10WA100
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/77436/pdf
- Page: https://openairdocs.org/ntsb/DCA10WA100

## Sequence of events

The events NTSB coded, in order, by phase of flight. The defining event best describes what happened.

- [Enroute: Pressure/environ sys malf/fail](https://openairdocs.org/ntsb-events/331) (defining event); cases with it: [All aircraft, 116 cases](https://openairdocs.org/ntsb-events/331/sequence.md)

## Factual narrative

On July 23, 2010, a Airone Boeing 737-400, registration EI-CWW, conducted an emergency descent after experiencing a decompression. The flight continued on to its destination at 10,000 feet. There were no injuries to the 6 crew members onboard and the airplane received no damaged. The repositioning flight was enroute from Pescara - Abruzzo International Airport (LIBP), Pescara, Italy, to Milan - Linate Airport (LIML), Milan, Italy.The investigation is being conducted by the Italian Agenzia nazionale per la sicurezza del volo (ANSV). The NTSB has appointed a U.S. Accredited Representative to assist the investigation under the provisions of ICAO Annex 13 as the State of Manufacture and Design of the airplane. Agenzia Nazionale per la Sicurezza del Volo (ANSV) Via Attilio Benigni, 53-00156 Roma, Italy Telephone +39 06 82078240 Fax +39 06 8273672 E-mail: safety.info@ansv.it

## Aircraft

- Registration: EI-CWW (not matched to a registry record)
- Reported make and model: BOEING 737 (400)
- Category: Airplane
- Damage: No damage
- Flight: Non-U.S., commercial
- Operator: AirOne
- Airworthiness certificate: Standard, Transport
- Departed: LIBP, Pescara
- Destination: LIML, Milan
- Flight plan: IFR
- Airport: LIML, Milan - Linate Airport

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

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