ASN Wikibase Occurrence # 180285
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| Date: | Friday 2 October 2015 |
| Time: | |
| Type: |  Boeing 747-451 |
| Owner/operator: | Delta Air Lines |
| Registration: | N662US |
| MSN: | 23720/708 |
| Year of manufacture: | 1989 |
| Fatalities: | Fatalities: 0 / Occupants: |
| Aircraft damage: | Minor |
| Location: | Russian airspace -
 Russia
|
| Phase: | En route |
| Nature: | Passenger - Scheduled |
| Departure airport: | Seoul-Incheon International Airport (ICN/RKSI) |
| Detroit International Airport, MI (DTW) | |
| Confidence Rating: |  Information verified through data from accident investigation authorities |
Delta Air Lines flight DL158, a Boeing 747-451 airplane, N662US, enroute from Seoul, Korea to Detroit, Michigan while operating in Russian air space, had an inflight shutdown of the No. 3 engine, a Pratt & Whitney PW4056. The airplane diverted to Narita International Airport, Tokyo, Japan for landing. When maintenance personnel were removing the engine from the airplane, it was noted that there were several holes in the low pressure turbine case, however the failure was not classified as uncontained.
There were nicks to the right wing's flap and aileron and the leading edge of the right horizontal stabilizer downstream from the No. 3 engine's exhaust.
The aircraft was back in service on October 9.
The National Transportation Safety Board determines the probable cause(s) of this incident as follows:
The PW4056 engine experienced an in-flight loss of power because of damage to the low-pressure turbine (LPT) because of the inadequate overhaul inspection and repair instructions that existed at the time of the LPT module's last overhaul. A vane hook in the LPT case wore to the point to allow a 3rd stage turbine vane cluster to disengage and eventually fall into the path of the 3rd stage turbine blades causing extensive downstream damage to the LPT module.
Sources:
http://aerossurance.com/air-accidents-incidents/contained-failure-pw4056-delta/
https://ntsb.gov/_layouts/ntsb.aviation/brief.aspx?ev_id=20151005X35533&key=1
History of this aircraft
Other occurrences involving this aircraft
| 8 September 2015 | N662US | Delta Airlines | 0 | Over Norfolk, UK |  |
min |
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 10-Oct-2015 06:17 | harro | Added |
| 28-Oct-2017 15:57 | Aerossurance | Updated [Source] |
| 28-Oct-2017 15:59 | Aerossurance | Updated [Source, Narrative] |
Corrections or additions? ... Edit this accident description
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