Boeing 767 432ER N840MH
8 September 2009 · St. Johns, Canada · Unknown
Summary
On 8 September 2009 at about 01:00 local time, a Boeing 767 432ER registered N840MH, operated by Delta Air Lines Inc, was involved in an incident near St. Johns, Canada. The number of people on board was not recorded. The aircraft was slightly damaged. The NTSB has published a probable cause for this accident; it is quoted in full below.
The record
- Date
- at 01:00
- Classification
- Incident
- Location
- St. Johns, Canada
- Coordinates
- 47.5000, -52.6000
- Aircraft
- Boeing 767 432ER
- Registration
- N840MH
- Category
- Airplane
- Year built
- 2001
- Operator
- Delta Air Lines Inc
- Operating rule
- Part 121: Air Carrier
- Phase of flight
- Not recorded
- Route
- New York → Venice
- Aircraft damage
- Minor
- Weather
- Unk
- Light
- Not Reported
- NTSB number
- ENG09IA016
People
Injuries not recorded.
| On board | Died | Serious | Minor | Uninjured |
|---|---|---|---|---|
| Not recorded | 0 | 0 | 0 | 0 |
Probable cause
Incorrect installation of a wire bundle, which contained wires for oxygen system, passenger address system and lavatory power, led to chafing of the wires on structure. The chafing eventually exposed the wire conductors and resulted in electrical arcing, malfunction of the affected systems and a sulfur odor.
Quoted verbatim from the NTSB record. This site does not paraphrase or interpret it.
Read the full NTSB narrative
The Delta Airlines 767 was two hours enroute from John F. Kennedy International Airport (JFK) to Venice Marco Polo Airport (VCE), when the cabin lights flickered, the passenger address system was intermittent and then inop, the left side oxygen masks deployed and a sulphur smell was observed, but no smoke. The flight diverted to ATL and landed without incident. Examination of the area above the forward lavatory on the left side revealed fractured wires, sooted equipment, and chafed structure. Drawings showed the wire bundle was incorrectly routed. These findings indicated that the incorrect routing allowed the wires to chafe over time. This chafe eventually exposed the conductor(s) and either two wires or a wire to grounded structure resulted in a electrical short with arcing. A review of the wire functions within the bundle showed wires related to oxygen system, passenger address system, and lavatory power. This is consistent with the reported anomalies.
Quoted verbatim from the NTSB record.
Other Boeing 767 accidents
| Date | Aircraft | Location | Operator | Outcome | Died |
|---|---|---|---|---|---|
| 20 Apr 2009 | Boeing 767 | New York, New York, United States | Royal Air Maroc | No injuries | - |
| 20 Jul 2009 | Boeing 767 | Keflavik, Iceland | United Airlines | No injuries | - |
| 19 Oct 2009 | Boeing 767 | Atlanta Hartsfield Intl. Apt. (KATL), Georgia, United States | Delta Air Lines, Inc. | No injuries | - |
| 5 Oct 2009 | Boeing 767-3P6 | Unknown, Argentina | Delta Air Lines Inc | Serious injuries | - |
| 27 Oct 2009 | Boeing 767-432ER | Atlanta, Georgia, United States | Delta Air Lines Inc | Serious injuries | - |
| 5 Jun 2009 | Boeing 767 | Taipei, Taiwan, Taiwan | Japan Airlines International Co Ltd | No injuries | - |
Other accidents in this area
| Date | Aircraft | Location | Operator | Outcome | Died |
|---|---|---|---|---|---|
| 20 Jul 2009 | Piper PA-46-31P | Kamsack, Canada | - | Fatal | 2 |
| 12 Mar 2009 | Sikorsky S-92A | St. John's, Newfoundland, Canada | Cougar Helicopter Inc. | Fatal | 17 |
| 19 Jun 2009 | Boeing 767 | North Bay, Canada | LOT Polish Airline | No injuries | - |
| 3 Aug 2009 | Unknown aircraft | Torrance, Canada | - | Fatal | 2 |
| 5 Aug 2009 | Enstrom F28 | Mont Laurier, Canada | - | Fatal | 2 |
| 28 Aug 2009 | Eurocopter AS350 B2 | Némisko, Canada | Abitibi Helicopters Ltd. | No injuries | - |