# NTSB DCA12WA127: Boeing 747-400, London, United Kingdom, August 17, 2012

- Type: NTSB incident investigation
- Classification: Incident · No injuries · Foreign investigation
- Date: August 17, 2012, 23:00 local (23:00 UTC)
- Place: London, United Kingdom
- Phase of flight: [Approach](https://openairdocs.org/ntsb-phases/500) (OpenAirDocs' grouping)
- Defining event: [Approach: Electrical system malf/failure](https://openairdocs.org/ntsb-events/332)
- Highest injury: No injuries
- Injuries: 362 uninjured
- Status: Led by another country's authority
- NTSB office: Major Investigations Division
- Lead agency: Other
- NTSB case key (mKey): 84719
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DCA12WA127
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/84719/pdf
- Page: https://openairdocs.org/ntsb/DCA12WA127

## Sequence of events

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

- [Approach: Electrical system malf/failure](https://openairdocs.org/ntsb-events/332) (defining event); cases with it: [All aircraft, 182 cases](https://openairdocs.org/ntsb-events/332/sequence.md)

## Factual narrative

The United Kingdom's Air Accidents Investigations Branch (AAIB), has notified the NTSB of an accident involving a Boeing 747-400 that occurred on August 17, 2012. The NTSB has appointed a U.S. Accredited Representative to assist the AAIB investigation under the provisions of ICAO Annex 13 as the State of Manufacturer and Design of the airplane. All investigative information will be released by the AAIB.

## Aircraft

- Registration: 9M-MPL (not matched to a registry record)
- Reported make and model: BOEING 747-400
- Category: Airplane
- Damage: No damage

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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