# NTSB DCA11WA105: Boeing 737, Hamamatsu City, Japan, September 6, 2011

- Type: NTSB incident investigation
- Classification: Incident · Minor injuries · Foreign investigation
- Date: September 6, 2011, 13:50 local (13:50 UTC)
- Place: Hamamatsu City, Japan
- Highest injury: Minor injuries
- Injuries: 2 minor, 115 uninjured
- Status: Led by another country's authority
- NTSB office: Major Investigations Division
- Lead agency: Other
- NTSB case key (mKey): 81927
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DCA11WA105
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/81927/pdf
- Page: https://openairdocs.org/ntsb/DCA11WA105

## Factual narrative

On September 6, 2011, at 22:50 local time (13:50 UTC), a Boeing 737-700, registration JA16AN, operated by Air Nippon Co., Ltd., entered an unusual attitude and lost altitude about 43km south of Hamamatsu City, Shizuoka Prefecture, Japan, as the aircraft was in cruise at an altitude of about 41,000 feet. The aircraft recovered and landed at Tokyo International Airport, Tokyo, Japan. There was no damage to the aircraft, and 2 of the 117 persons on board the aircraft sustained minor injuries. The incident is being investigated by the Japan Transport Safety Board (JTSB). The NTSB has designated a U.S. Accredited Representative as the state of manufacture of the aircraft under the provisions of ICAO Annex 13. All inquiries should be directed to the JTSB at the following: Japan Transport Safety Board Ministry of Land, Infrastructure, Transport and Tourism Kasumigaseki 2-1-2, Chiyoda-ku Tokyo 100-8918 Japan website: http://www.mlit.go.jp/jtsb/english.html

## Aircraft

- Registration: JA16AN (not matched to a registry record)
- Reported make and model: BOEING 737 (781)
- Damage: No damage
- Flight: Part 129

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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