Incident · 2015-10-02
What the record says
- Event date
- 2015-10-02
- Event type
- Incident
- Highest injury level
- No injuries
- Aircraft
- BOEING 747 (N662US)
- Operating rule
- Part 121
- Operator
- DELTA AIR LINES, INC. Operator named in NTSB report
- Operated by (per NTSB report)
- Delta Air Lines
Probable cause
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.
Source: NTSB case ENG16IA001Flight crew
Certification and experience as recorded in the NTSB accident database for this event. The NTSB records these facts about the crew's flying history; GroundCheck shows them as filed, without names or identities.
| Role | Certificate | Instrument rating | Age | Medical | Flight hours |
|---|---|---|---|---|---|
| Pilot pilot flying | Airline transport pilot / Commercial | Airplane | 59 | Class 1 (2015-09-02) | 10,617 total · 4,449 in this make/model |
| Co-pilot pilot flying | Airline transport pilot / Commercial | Airplane | 58 | Class 1 (2015-07-20) | 9,863 total · 5,628 in this make/model |
Facts as the NTSB records them — GroundCheck adds no judgement. Preliminary records may be revised as the investigation proceeds.